This lab builds an off-grid, decentralized LoRa mesh communicator and environmental telemetry radio node running the open-source Meshtastic firmware stack. The design is architected around Sub-GHz LoRa spread-spectrum transceivers paired with a low-power 32-bit microcontroller. While the firmware supports Espressif ESP32, Nordic Semiconductor nRF52/nRF54, Raspberry Pi RP2040/RP2350, and native Linux hosts, the default hardware environment defined in the build configuration is the Heltec WiFi LoRa 32 V3 platform. The node operates with a core 3.3 V DC logic rail powered by an onboard low-dropout voltage regulator fed from either a nominal 5.0 V USB VBUS supply (via USB Type-C) or a 3.7 V nominal single-cell Lithium-Polymer (LiPo) / Lithium-Ion battery (operating between 3.0 V cut-off and 4.2 V full charge). All I2C, SPI, and UART digital buses operate strictly at 3.3 V logic levels; connecting 5 V logic peripherals without level shifters will damage the core transceiver and MCU.

Bill of Materials

Primary Host Platform / Commercial Off-The-Shelf (COTS) Board

• Identity: Heltec WiFi LoRa 32 (V3) Development Board. Integrates an Espressif ESP32-S3FN8 dual-core Xtensa LX7 MCU (Wi-Fi 2.4 GHz, BLE 5.0), a Semtech SX1262 LoRa transceiver, a 0.96-inch 128x64 monochrome OLED display, an onboard TP4054 LiPo charge management IC, a CP2102 or CH9102 USB-to-UART bridge, an IPEX/U.FL RF connector, and user/reset tactile switches.
• Quantity: 1
• Footprint/package: Dual-row 18-pin breadboard-compatible DIP module (25.4 mm row spacing, 2.54 mm pin pitch), dimensions approximately 50.8 mm x 22.8 mm.
• Electrical constraints: Supply voltage 5.0 V DC via USB-C or 3.7 V nominal (3.0 V to 4.2 V max) via onboard 2-pin battery header. Logic rail is 3.3 V DC regulated. RF output power up to +22 dBm (160 mW). Peak transmit current up to 150 mA on RF bursts, up to 350 mA with Wi-Fi active.
• Substitution latitude: Must match Heltec WiFi LoRa 32 V3 pin mapping and architecture to compile with default environment heltec-v3. Any other ESP32, nRF52840, or RP2040 Meshtastic board (e.g., LilyGO T-Beam, Seeed Studio Wio-E5, RAKwireless WisBlock 4631) can be substituted only if switching to its respective variant build target.
• Control operated by student: Yes; onboard PRG/User momentary button is operated during node use for screen switching and channel beaconing, and RST button for manual resets.
• Sourcing plan: retail shopping search: Heltec WiFi LoRa 32 V3 915MHz or 868MHz

Modular Core Components (for Custom / DIY Builds Referenced in extra_configs)

• Identity: Semtech SX1262 LoRa Transceiver IC or integrated module (e.g., Ai-Thinker Ra-08, Ebyte E22-900M22S).

• Quantity: 1

• Footprint/package: QFN-24 (4 mm x 4 mm) for bare IC, or surface-mount castellated PCB module (e.g., 16 mm x 20 mm).

• Electrical constraints: Supply voltage 1.8 V to 3.7 V DC (runs at 3.3 V rail). Frequency coverage 150 MHz to 960 MHz (typically tuned for 868 MHz or 915 MHz ISM band). TX power up to +22 dBm. Controlled via SPI bus (MOSI, MISO, SCK, NSS) plus DIO1, BUSY, and RESET lines.

• Substitution latitude: Firmware explicitly excludes legacy transceivers (CC1101, NRF24, RF69, SX1231, SX1233, SI443X, RFM2X). Supported replacements are limited to Semtech SX126x (SX1262, SX1268), SX127x (SX1276, SX1278), SX128x (SX1280 2.4 GHz), or LR11x0 (LR1110, LR1120) transceivers supported by RadioLib.

• Control operated by student: No.

• Sourcing plan: distributor lookup: SX1262IMLTRT

• Identity: Sub-GHz Tuned Dipole or Whip Antenna (frequency matched to regional ISM regulation: 915 MHz US/Americas, 868 MHz EU, or 433 MHz Asia/EU).

• Quantity: 1

• Footprint/package: IPEX MHF/U.FL connector or external SMA-Male whip antenna.

• Electrical constraints: 50 Ω nominal impedance, VSWR ≤ 1.5:1 at center frequency.

• Substitution latitude: Any 50 Ω antenna tuned to the operating LoRa frequency band. Operating the transceiver without a matched antenna will damage the RF power amplifier.

• Control operated by student: No.

• Sourcing plan: retail shopping search: 915MHz LoRa antenna SMA U.FL

• Identity: RF Coaxial Adapter Cable (Pigtail). U.FL (IPEX MHF1) to SMA Female bulkhead.

• Quantity: 1

• Footprint/package: 1.13 mm micro-coaxial cable, length 100 mm to 150 mm; chassis bulkhead mount SMA female jack.

• Electrical constraints: 50 Ω characteristic impedance, insertion loss ≤ 0.5 dB up to 1 GHz.

• Substitution latitude: Any 50 Ω low-loss micro-coax with matching U.FL and SMA connectors.

• Control operated by student: No.

• Sourcing plan: retail shopping search: IPEX U.FL to SMA female pigtail cable 15cm

• Identity: Single-cell Lithium-Polymer / Lithium-Ion Rechargeable Battery.

• Quantity: 1

• Footprint/package: Pouch cell or 18650 cylindrical cell terminated with 1.25 mm pitch 2-pin Molex/JST connector.

• Electrical constraints: Nominal voltage 3.7 V DC, charge cutoff 4.2 V, discharge cutoff 3.0 V. Capacity 1000 mAh to 3500 mAh with integrated PCM (protection circuit module against short circuit, over-charge, and over-discharge).

• Substitution latitude: Any 1S LiPo/Li-ion battery. Attention to pin polarity is mandatory as 1.25 mm battery connectors lack standardized +/- pin assignment across manufacturers.

• Control operated by student: No.

• Sourcing plan: retail shopping search: 3.7V 2000mAh LiPo battery 1.25mm connector

• Identity: USB 2.0 Type-A to Type-C Cable.

• Quantity: 1

• Footprint/package: Standard USB Type-A male to Type-C male, length 1 meter.

• Electrical constraints: 5.0 V VBUS, minimum 500 mA rated current, fully wired 4-wire shielded cable (VBUS, GND, D+, D-) to support 115200 baud serial programming and debugging. Power-only charge cables will fail flashing and CLI operations.

• Substitution latitude: Any USB data cable with Type-C termination.

• Control operated by student: Yes; repeatedly connected and disconnected by student during programming and field charging.

• Sourcing plan: retail shopping search: USB-A to USB-C data cable 1m

Displays, Indicators, and User Controls

• Identity: 0.96-inch Monochrome I2C OLED Display Module (integrated on Heltec V3 or standalone module).

• Quantity: 1

• Footprint/package: 4-pin 2.54 mm header (GND, VCC, SCL, SDA), module footprint 27 mm x 27 mm.

• Electrical constraints: Supply voltage 3.3 V to 5.0 V DC (integrated charge pump). I2C communication at address 0x3C or 0x3D. Logic levels 3.3 V.

• Substitution latitude: SSD1306, SH1106, or SH1107 controller based on driver libraries. Alternatively, E-ink panels supported by the niche graphics layer (e.g. UC8151D, SSD1680) via SPI bus when compiled with -D MESHTASTIC_INCLUDE_NICHE_GRAPHICS.

• Control operated by student: No (visual indicator).

• Sourcing plan: retail shopping search: 0.96 inch I2C OLED display 128x64 SSD1306

• Identity: Tactile Pushbuttons (User Function and Reset).

• Quantity: 2

• Footprint/package: Surface-mount 3 mm x 4 mm or 6 mm x 6 mm through-hole tactile momentary switch.

• Electrical constraints: SPST normally open, rated 12 V DC, 50 mA. Pulled up to 3.3 V via onboard resistors, pulling GPIO to GND when depressed.

• Substitution latitude: Any momentary normally-open switch. Actuator style must be finger-accessible tactile switch.

• Control operated by student: Yes; active control operated by the user to navigate device UI, send manual node beacons, or enter bootloader mode.

• Sourcing plan: distributor lookup (representative example — sources give spec only): PTS645SM43SMTR92 LFS

• Identity: Addressable RGB Status Indicator (NeoPixel).

• Quantity: 1

• Footprint/package: 5050 SMD or 3535 SMD (WS2812B or SK6812).

• Electrical constraints: Supply voltage 3.3 V to 5.0 V DC, single-wire NRZ serial data input at 800 kHz. Logic threshold compatible with 3.3 V.

• Substitution latitude: Any WS2812B, SK6812, or compatible single-wire RGB LED supported by Adafruit NeoPixel library.

• Control operated by student: No (visual indicator).

• Sourcing plan: distributor lookup (representative example — sources give spec only): WS2812B-B

GNSS / Location Peripherals

• Identity: Serial GNSS / GPS Receiver Module (supported via TinyGPSPlus driver).
• Quantity: 1
• Footprint/package: External breakout module (e.g., u-blox NEO-6M, NEO-8M, or MAX-M10S) with ceramic patch antenna; 4-pin to 6-pin 2.54 mm connector (VCC, GND, TX, RX, PPS).
• Electrical constraints: Supply voltage 3.3 V DC (or 5 V with onboard LDO). 3.3 V UART logic level at 9600 baud (or configurable up to 115200 baud).
• Substitution latitude: Any NMEA-0183 standard UART GPS/GNSS receiver module.
• Control operated by student: No.
• Sourcing plan: retail shopping search: u-blox NEO-8M GPS module 3.3V UART

Environmental Telemetry Sensors (Driver Libraries in environmental_base and environmental_extra)

• Identity: Bosch Sensortec BME280 Combined Pressure, Humidity, and Temperature Sensor.

• Quantity: 1 (optional telemetry module)

• Footprint/package: LGA-8 (2.5 mm x 2.5 mm x 0.93 mm) or 4-pin/6-pin I2C/SPI breakout module.

• Electrical constraints: Supply voltage 1.71 V to 3.6 V DC (runs at 3.3 V rail). I2C interface (address 0x76 or 0x77).

• Substitution latitude: Bosch BMP280 (temperature and pressure only) or Bosch BMP085 / BMP180 / BMP388 / BMP390 supported by corresponding Adafruit libraries.

• Control operated by student: No.

• Sourcing plan: distributor lookup: BME280

• Identity: Infineon DPS310 High-Precision Barometric Pressure Sensor.

• Quantity: 1 (optional telemetry module)

• Footprint/package: 8-pin LGA (2.0 mm x 2.5 mm) or breakout board.

• Electrical constraints: Supply voltage 1.7 V to 3.6 V DC. I2C interface (address 0x77 or 0x76).

• Substitution latitude: Supported via Adafruit DPS310 library; substitutes include BMP280, LPS22HB.

• Control operated by student: No.

• Sourcing plan: distributor lookup: DPS310XTSA1

• Identity: STMicroelectronics LPS22HB / LPS25HB Barometric Pressure and Temperature Sensor.

• Quantity: 1 (optional telemetry module)

• Footprint/package: HLGA-10 (2.0 mm x 2.0 mm) or breakout board.

• Electrical constraints: Supply voltage 1.7 V to 3.6 V DC. I2C interface.

• Substitution latitude: Supported via Adafruit LPS2X library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: LPS22HBTR

• Identity: Microchip MCP9808 Precision I2C Temperature Sensor.

• Quantity: 1 (optional telemetry module)

• Footprint/package: MSOP-8 or DFN-8 (or breakout board).

• Electrical constraints: Supply voltage 2.7 V to 5.5 V DC. Accuracy ±0.25°C typ. I2C address 0x18–0x1F.

• Substitution latitude: Supported via Adafruit MCP9808 library. Compatible alternatives include NXP PCT2075 supported by Adafruit PCT2075 library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: MCP9808-E/MS

• Identity: NXP PCT2075 Temperature Sensor and Thermal Watchdog.

• Quantity: 1 (optional telemetry module)

• Footprint/package: SO8, TSSOP8, or HVSON8 (or breakout board).

• Electrical constraints: Supply voltage 2.7 V to 5.5 V DC. I2C addressable.

• Substitution latitude: Supported via Adafruit PCT2075 library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: PCT2075DP,118

• Identity: Aosong AHT10 / AHT20 Temperature and Humidity Sensor.

• Quantity: 1 (optional telemetry module)

• Footprint/package: SMD-6 or breakout board.

• Electrical constraints: Supply voltage 2.0 V to 5.5 V DC. I2C address 0x38.

• Substitution latitude: Supported via Adafruit AHTX0 library. Alternatives include Sensirion SHT3x series.

• Control operated by student: No.

• Sourcing plan: distributor lookup: AHT20

• Identity: Sensirion SHT30 / SHT31 / SHT35 Digital Humidity and Temperature Sensor.

• Quantity: 1 (optional telemetry module)

• Footprint/package: DFN-8 (2.5 mm x 2.5 mm) or breakout board.

• Electrical constraints: Supply voltage 2.15 V to 5.5 V DC. I2C address 0x44 or 0x45.

• Substitution latitude: Supported via arduino-sht library (compatible with SHT3x, SHT7x, SHT85).

• Control operated by student: No.

• Sourcing plan: distributor lookup: SHT31-DIS-B

• Identity: Sensirion SCD40 / SCD41 Photoacoustic NDIR CO2, Temperature, and Humidity Sensor.

• Quantity: 1 (optional telemetry module)

• Footprint/package: SMD-20 (10.1 mm x 10.1 mm x 6.5 mm) or breakout board.

• Electrical constraints: Supply voltage 2.4 V to 5.5 V DC. Peak current ~205 mA during measurement. I2C interface.

• Substitution latitude: Supported via Sensirion I2C SCD4x library. Alternative is Sensirion SCD30 (NDIR) supported via Sensirion I2C SCD30 library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: SCD41-2090

• Identity: Sensirion SCD30 NDIR CO2, Temperature, and Humidity Sensor Module.

• Quantity: 1 (optional telemetry module)

• Footprint/package: Integrated PCB module with pin header (35 mm x 23 mm x 7 mm).

• Electrical constraints: Supply voltage 3.3 V to 5.5 V DC. Average current 19 mA at 2 s sample rate, peak 75 mA. I2C interface.

• Substitution latitude: Supported via Sensirion I2C SCD30 library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: SCD30

• Identity: Sensirion SFA30 Formaldehyde (HCHO), Temperature, and Humidity Sensor Module.

• Quantity: 1 (optional telemetry module)

• Footprint/package: Pre-calibrated integrated module with 4-pin header connector.

• Electrical constraints: Supply voltage 3.15 V to 5.5 V DC. I2C interface.

• Substitution latitude: Supported via Sensirion I2C SFA3x library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: SFA30

• Identity: Bosch Sensortec BME680 Environmental Gas, Temperature, Humidity, and Barometric Pressure Sensor.

• Quantity: 1 (optional telemetry module)

• Footprint/package: LGA-8 (3.0 mm x 3.0 mm x 0.93 mm) or breakout board.

• Electrical constraints: Supply voltage 1.71 V to 3.6 V DC. I2C/SPI interface. Gas sensor heater requires up to 18 mA pulse current.

• Substitution latitude: Supported via Adafruit_BME680 library. Note that firmware uses an in-tree open IAQ estimator (BME680IaqEstimator) rather than Bosch proprietary BSEC binary blobs.

• Control operated by student: No.

• Sourcing plan: distributor lookup: BME680

• Identity: Seeed Studio / Plantower HM3301 Laser Dust / PM2.5 Particulate Matter Sensor.

• Quantity: 1 (optional telemetry module)

• Footprint/package: Module with 8-pin connector interface.

• Electrical constraints: Supply voltage 3.3 V to 5.0 V DC. Fan and laser consume up to 120 mA active. I2C interface.

• Substitution latitude: Supported via Seeed_PM2_5_sensor_HM3301 library.

• Control operated by student: No.

• Sourcing plan: retail shopping search: Seeed Studio HM3301 laser PM2.5 dust sensor

• Identity: Melexis MLX90614 Non-Contact Infrared Thermometer.

• Quantity: 1 (optional telemetry module)

• Footprint/package: TO-39 metal can package or 4-pin breakout board.

• Electrical constraints: Supply voltage 3.3 V DC (3V version MLX90614BAA/BCC) or 5.0 V DC (MLX90614AAA). SMBus / I2C compatible interface. Must use 3.3 V model for direct 3.3 V bus connection.

• Substitution latitude: Supported via Adafruit MLX90614 library. Miniature alternative is MLX90632 supported via EmotiBit MLX90632 library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: MLX90614ESF-BAA-000-TU

• Identity: Melexis MLX90632 Miniature Far-Infrared Temperature Sensor.

• Quantity: 1 (optional telemetry module)

• Footprint/package: 4-pin QFN (3.0 mm x 3.0 mm x 1.0 mm).

• Electrical constraints: Supply voltage 3.0 V to 3.6 V DC. I2C interface.

• Substitution latitude: Supported via EmotiBit MLX90632 library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: MLX90632SLD-DCB-000-RE

• Identity: TDK InvenSense MPU-6050 6-DoF Accelerometer and Gyroscope.

• Quantity: 1 (optional telemetry module)

• Footprint/package: QFN-24 (4 mm x 4 mm) or GY-521 breakout board.

• Electrical constraints: Supply voltage 2.375 V to 3.46 V DC (3.3 V rail). I2C address 0x68 or 0x69.

• Substitution latitude: Supported via Adafruit MPU6050 library. Supported alternatives include ST LSM6DS series or TDK ICM-20948 / ICM-42670-P.

• Control operated by student: No.

• Sourcing plan: distributor lookup (representative example — sources give spec only): MPU-6050

• Identity: TDK InvenSense ICM-20948 9-DoF Motion Tracking Device (3-axis Gyro, 3-axis Accel, 3-axis Compass).

• Quantity: 1 (optional telemetry module)

• Footprint/package: QFN-24 (3.0 mm x 3.0 mm) or SparkFun breakout board.

• Electrical constraints: Logic supply voltage 1.71 V to 1.95 V (breakout provides 3.3 V regulation and level shifting). I2C/SPI interface.

• Substitution latitude: Supported via SparkFun 9DoF IMU Breakout ICM 20948 library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: ICM-20948

• Identity: TDK InvenSense ICM-42670-P High-Performance 6-Axis MotionTracking IMU.

• Quantity: 1 (optional telemetry module)

• Footprint/package: 14-pin LGA (2.5 mm x 3.0 mm).

• Electrical constraints: VDD supply 1.71 V to 3.6 V DC. I2C/SPI interface.

• Substitution latitude: Supported via TDK InvenSense ICM42670P library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: ICM-42670-P

• Identity: STMicroelectronics LIS3DH 3-Axis Ultra-Low Power Accelerometer.

• Quantity: 1 (optional telemetry module)

• Footprint/package: LGA-16 (3.0 mm x 3.0 mm) or breakout board.

• Electrical constraints: Supply voltage 1.71 V to 3.6 V DC. I2C/SPI interface.

• Substitution latitude: Supported via Adafruit LIS3DH library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: LIS3DHTR

• Identity: STMicroelectronics LSM6DSOX / LSM6DS33 6-DoF IMU.

• Quantity: 1 (optional telemetry module)

• Footprint/package: LGA-14 (2.5 mm x 3.0 mm) or Adafruit breakout board.

• Electrical constraints: Supply voltage 1.71 V to 3.6 V DC. I2C/SPI interface.

• Substitution latitude: Supported via Adafruit LSM6DS library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: LSM6DSOXTR

• Identity: QST QMC5883L 3-Axis Digital Magnetometer / Compass.

• Quantity: 1 (optional telemetry module)

• Footprint/package: LCC-16 (3.0 mm x 3.0 mm) or breakout board.

• Electrical constraints: Supply voltage 2.16 V to 3.6 V DC. I2C address 0x0D.

• Substitution latitude: Supported via QMC5883L Compass library. Must not be confused with Honeywell HMC5883L (different I2C register map). Alternatives include Bosch BMM150 or MEMSIC MMC5983MA.

• Control operated by student: No.

• Sourcing plan: distributor lookup (representative example — sources give spec only): QMC5883L

• Identity: Bosch Sensortec BMM150 3-Axis Geomagnetic Sensor.

• Quantity: 1 (optional telemetry module)

• Footprint/package: WLCSP-12 (1.56 mm x 1.56 mm) or DFRobot breakout board.

• Electrical constraints: Supply voltage 1.62 V to 3.6 V DC. I2C/SPI interface.

• Substitution latitude: Supported via DFRobot_BMM150 library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: BMM150

• Identity: MEMSIC MMC5983MA Tri-Axis Magnetometer.

• Quantity: 1 (optional telemetry module)

• Footprint/package: LGA-16 (3.0 mm x 3.0 mm x 1.0 mm) or SparkFun breakout board.

• Electrical constraints: Supply voltage 2.8 V to 3.6 V DC. I2C/SPI interface.

• Substitution latitude: Supported via SparkFun MMC5983MA library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: MMC5983MA

• Identity: AMS / TAOS TSL2591 High Dynamic Range Digital Light Sensor.

• Quantity: 1 (optional telemetry module)

• Footprint/package: ODFN-6 (2.0 mm x 2.4 mm) or Adafruit breakout board.

• Electrical constraints: Supply voltage 3.0 V to 3.6 V DC. I2C address 0x29.

• Substitution latitude: Supported via Adafruit TSL2591 library. Alternatives include TSL2561, BH1750, VEML7700, or OPT3001.

• Control operated by student: No.

• Sourcing plan: distributor lookup: TSL25911FN

• Identity: AMS / TAOS TSL2561 Ambient Light Sensor.

• Quantity: 1 (optional telemetry module)

• Footprint/package: 6-pin TMB or breakout board.

• Electrical constraints: Supply voltage 2.7 V to 3.6 V DC. I2C interface.

• Substitution latitude: Supported via Adafruit_TSL2561 library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: TSL2561FN

• Identity: ROHM BH1750FVI Digital Ambient Light Sensor.

• Quantity: 1 (optional telemetry module)

• Footprint/package: WSOF-6 or GY-30 / BH1750 breakout board.

• Electrical constraints: Supply voltage 2.4 V to 3.6 V DC. I2C interface.

• Substitution latitude: Supported via BH1750_WE library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: BH1750FVI-TR

• Identity: Vishay VEML7700 High-Accuracy Ambient Light Sensor.

• Quantity: 1 (optional telemetry module)

• Footprint/package: SMD-4 (6.8 mm x 2.35 mm x 3.0 mm) or Adafruit breakout board.

• Electrical constraints: Supply voltage 2.5 V to 3.6 V DC. I2C interface.

• Substitution latitude: Supported via Adafruit VEML7700 library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: VEML7700-TR

• Identity: Texas Instruments OPT3001 Ambient Light Sensor.

• Quantity: 1 (optional telemetry module)

• Footprint/package: USON-6 (2.0 mm x 2.0 mm) or ClosedCube breakout board.

• Electrical constraints: Supply voltage 1.6 V to 3.6 V DC. I2C interface.

• Substitution latitude: Supported via ClosedCube OPT3001 library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: OPT3001DNPR

• Identity: Lite-On LTR-390UV Ambient Light and UV Sensor.

• Quantity: 1 (optional telemetry module)

• Footprint/package: ODLGA-6 (2.0 mm x 2.0 mm) or Adafruit breakout board.

• Electrical constraints: Supply voltage 1.7 V to 3.6 V DC. I2C address 0x53.

• Substitution latitude: Supported via Adafruit LTR390 Library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: LTR-390UV-01

• Identity: ScioSense / ams AS3935 Franklin Lightning Sensor IC.

• Quantity: 1 (optional telemetry module)

• Footprint/package: MLPQ-16 (4 mm x 4 mm) or SparkFun / CJMCU breakout board with integrated tuned inductor.

• Electrical constraints: Supply voltage 2.4 V to 5.5 V DC (runs at 3.3 V rail). SPI or I2C interface.

• Substitution latitude: Must be AS3935 due to proprietary RF lightning front-end algorithm.

• Control operated by student: No.

• Sourcing plan: distributor lookup: AS3935-BQFT

• Identity: Maxim Integrated MAX30102 Optical Pulse Oximeter and Heart-Rate Sensor.

• Quantity: 1 (optional telemetry module)

• Footprint/package: 14-pin OESIP (5.6 mm x 3.3 mm x 1.55 mm) or SparkFun breakout board.

• Electrical constraints: VDD power 1.8 V with 3.3 V LED power rails; 3.3 V I2C interface.

• Substitution latitude: Supported via SparkFun MAX3010x library (MAX30100/MAX30102).

• Control operated by student: No.

• Sourcing plan: distributor lookup: MAX30102EFD+T

Power and Telemetry Monitor Hardware

• Identity: Texas Instruments INA219 Zero-Drift Bi-directional Current/Power Monitor.

• Quantity: 1 (optional telemetry module)

• Footprint/package: SOT-23-8 or breakout board with onboard 0.1 Ω shunt resistor.

• Electrical constraints: Bus voltage 0 V to 26 V DC. Operating supply 3.0 V to 5.5 V DC. I2C interface.

• Substitution latitude: Supported via Adafruit INA219 library. Alternatives include INA226 (up to 36 V bus) or INA260 (integrated 2 mΩ precision shunt).

• Control operated by student: No.

• Sourcing plan: distributor lookup: INA219AIDR

• Identity: Texas Instruments INA226 High-Side / Low-Side Bi-directional Current/Power Monitor.

• Quantity: 1 (optional telemetry module)

• Footprint/package: VSSOP-10 or breakout board.

• Electrical constraints: Bus voltage 0 V to 36 V DC. Operating supply 2.7 V to 5.5 V DC. I2C interface.

• Substitution latitude: Supported via RobTillaart INA226 library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: INA226AIDGSR

• Identity: Texas Instruments INA260 Precision Current and Power Monitor with Integrated Shunt.

• Quantity: 1 (optional telemetry module)

• Footprint/package: TSSOP-16 or Adafruit breakout board.

• Electrical constraints: Bus voltage 0 V to 36 V DC, integrated 2 mΩ shunt resistor (up to 15 A continuous). Operating supply 2.7 V to 5.5 V DC. I2C interface.

• Substitution latitude: Supported via Adafruit INA260 library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: INA260AIPWR

• Identity: Texas Instruments INA3221 3-Channel High-Side Current and Bus Voltage Monitor.

• Quantity: 1 (optional telemetry module)

• Footprint/package: QFN-16 (4 mm x 4 mm) or breakout board.

• Electrical constraints: Bus voltage 0 V to 26 V DC across 3 independent channels. Supply voltage 2.7 V to 5.5 V DC. I2C interface.

• Substitution latitude: Supported via RobTillaart INA3221_RT library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: INA3221AIRGVR

• Identity: Maxim Integrated MAX17043 / MAX17048 I2C LiPo Fuel Gauge.

• Quantity: 1 (optional telemetry module)

• Footprint/package: TDFN-8 (2 mm x 3 mm) or Adafruit breakout board.

• Electrical constraints: Operates from single-cell LiPo battery voltage (2.5 V to 4.5 V). ModelGauge algorithm tracks state of charge over I2C (address 0x36).

• Substitution latitude: Supported via Adafruit MAX1704X library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: MAX17048G+T10

• Identity: Nuvoton NAU7802 24-Bit Dual-Channel Precision ADC for Wheatstone Bridges and Load Cells.

• Quantity: 1 (optional telemetry module)

• Footprint/package: SOP-16, DIP-16, or SparkFun Qwiic Scale breakout board.

• Electrical constraints: Analog supply 2.7 V to 5.5 V DC. I2C interface.

• Substitution latitude: Supported via SparkFun Qwiic Scale NAU7802 library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: NAU7802SGI

• Identity: Texas Instruments ADS1015 / ADS1115 Precision ADC (12-bit / 16-bit 4-Channel).

• Quantity: 1 (optional telemetry module)

• Footprint/package: VSSOP-10, QFN-10, or Adafruit breakout board.

• Electrical constraints: Supply voltage 2.0 V to 5.5 V DC. I2C interface.

• Substitution latitude: Supported via Adafruit ADS1X15 library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: ADS1115IDGSR

• Identity: Maxim Integrated DS2482-100 / DS2484 Single-Channel I2C to 1-Wire Bus Master.

• Quantity: 1 (optional telemetry module)

• Footprint/package: SOIC-8, SOT-23-6, or Adafruit breakout board.

• Electrical constraints: Operating voltage 1.71 V to 5.5 V DC. Connects standard 1-Wire Dallas DS18B20 temperature probes over I2C.

• Substitution latitude: Supported via Adafruit DS248x library.

• Control operated by student: No.

• Sourcing plan: distributor lookup: DS2482S-100+T&R

• Identity: DFRobot Rainfall Sensor (Tipping Bucket Counter).

• Quantity: 1 (optional telemetry module)

• Footprint/package: Rain gauge mechanical bucket enclosure with pulse reed switch or I2C counter interface board.

• Electrical constraints: 3.3 V to 5.0 V DC. Digital pulse or I2C bus.

• Substitution latitude: Supported via DFRobot_RainfallSensor library.

• Control operated by student: No.

• Sourcing plan: retail shopping search: DFRobot Gravity rainfall sensor

• Identity: DFRobot Lark Weather Station Module.

• Quantity: 1 (optional telemetry module)

• Footprint/package: Integrated 5-in-1 wind speed, direction, temperature, humidity, pressure module with serial/I2C output.

• Electrical constraints: Supply voltage 3.3 V to 5.0 V DC.

• Substitution latitude: Supported via meshtastic-DFRobot_LarkWeatherStation library.

• Control operated by student: No.

• Sourcing plan: retail shopping search: DFRobot Lark weather station

Software and network dependencies

• PlatformIO Core / Build Toolchain

  • Source: PlatformIO ecosystem (pip / standalone installer at docs.platformio.org)
  • Version: not stated in the sources (configuration specifies check_tool = cppcheck and -Os -std=gnu++17)
  • Pinning: unpinned (global build system tool)
  • Manifest location: firmware_platformio.ini
  • Check plan: support-status lookup: platformio not stated

• Espressif Arduino Core Framework (Arduino Target Base)

  • Source: Arduino framework for ESP32 / PlatformIO platform integration
  • Version: not stated in root configuration (sub-variant configurations omitted)
  • Pinning: unpinned in root configuration
  • Manifest location: firmware_platformio.ini line 80 (framework = arduino)
  • Check plan: not checkable: version not stated

• Cppcheck Static Analysis Tool

  • Source: Cppcheck project
  • Version: not stated (firmware_platformio.ini sets compile flag -DAPP_VERSION=1.0.0)
  • Pinning: unpinned
  • Manifest location: firmware_platformio.ini line 71
  • Check plan: not checkable: version not stated

• meshtastic-esp8266-oled-ssd1306

  • Source: https://github.com/meshtastic/esp8266-oled-ssd1306/archive/bb93fd40685f22e850330ea162f1dd154a4e0685.zip
  • Version: git commit bb93fd40685f22e850330ea162f1dd154a4e0685
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 58
  • Check plan: not checkable: commit-pinned GitHub archive without upstream package registry

• meshtastic-OneButton

  • Source: https://github.com/meshtastic/OneButton/archive/fa352d668c53f290cfa480a5f79ad422cd828c70.zip
  • Version: git commit fa352d668c53f290cfa480a5f79ad422cd828c70
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 60
  • Check plan: not checkable: commit-pinned GitHub archive without upstream package registry

• meshtastic-arduino-fsm

  • Source: https://github.com/meshtastic/arduino-fsm/archive/7db3702bf0cfe97b783d6c72595e3f38e0b19159.zip
  • Version: git commit 7db3702bf0cfe97b783d6c72595e3f38e0b19159
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 62
  • Check plan: not checkable: commit-pinned GitHub archive without upstream package registry

• meshtastic-TinyGPSPlus

  • Source: https://github.com/meshtastic/TinyGPSPlus/archive/71a82db35f3b973440044c476d4bcdc673b104f4.zip
  • Version: git commit 71a82db35f3b973440044c476d4bcdc673b104f4
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 64
  • Check plan: not checkable: commit-pinned GitHub archive without upstream package registry

• meshtastic-ArduinoThread

  • Source: https://github.com/meshtastic/ArduinoThread/archive/b841b0415721f1341ea41cccfb4adccfaf951567.zip
  • Version: git commit b841b0415721f1341ea41cccfb4adccfaf951567
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 66
  • Check plan: not checkable: commit-pinned GitHub archive without upstream package registry

• Nanopb

  • Source: https://github.com/nanopb/nanopb/archive/0.4.92.zip
  • Version: 0.4.92
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 68
  • Check plan: vulnerability lookup: Nanopb / github / 0.4.92

• ErriezCRC32

  • Source: https://github.com/Erriez/ErriezCRC32/archive/refs/tags/1.0.1.zip
  • Version: 1.0.1
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 70
  • Check plan: not checkable: Arduino library without advisory database

• NonBlockingRTTTL

  • Source: https://github.com/end2endzone/NonBlockingRTTTL/archive/refs/tags/1.4.0.zip
  • Version: 1.4.0
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 84
  • Check plan: not checkable: Arduino library without advisory database

• TBPubSubClient

  • Source: https://github.com/thingsboard/pubsubclient/archive/refs/tags/v2.12.1.zip
  • Version: v2.12.1
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 94
  • Check plan: not checkable: Arduino library without advisory database

• NTPClient

  • Source: https://github.com/arduino-libraries/NTPClient/archive/refs/tags/3.2.1.zip
  • Version: 3.2.1
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 96
  • Check plan: not checkable: Arduino library without advisory database

• Syslog

  • Source: https://github.com/arcao/Syslog/archive/refs/tags/v2.0.zip
  • Version: v2.0
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 101
  • Check plan: not checkable: Arduino library without advisory database

• RadioLib

  • Source: https://github.com/jgromes/RadioLib/archive/510e00cfb05bbc3c2b7b524262785454944adb6e.zip
  • Version: git commit 510e00cfb05bbc3c2b7b524262785454944adb6e
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 105
  • Check plan: not checkable: commit-pinned GitHub archive without upstream package registry

• meshtastic/device-ui

  • Source: https://github.com/meshtastic/device-ui/archive/5870d3a55254aa46bbcab13a5a700d533ab304e3.zip
  • Version: git commit 5870d3a55254aa46bbcab13a5a700d533ab304e3
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 109
  • Check plan: not checkable: commit-pinned GitHub archive without upstream package registry

• Adafruit BusIO

  • Source: https://github.com/adafruit/Adafruit_BusIO/archive/refs/tags/1.17.4.zip
  • Version: 1.17.4
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 117
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit Unified Sensor

  • Source: https://github.com/adafruit/Adafruit_Sensor/archive/refs/tags/1.1.15.zip
  • Version: 1.1.15
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 119
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit GFX Library

  • Source: https://github.com/adafruit/Adafruit-GFX-Library/archive/refs/tags/1.12.6.zip
  • Version: 1.12.6
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 121
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit NeoPixel

  • Source: https://github.com/adafruit/Adafruit_NeoPixel/archive/1.15.5.zip
  • Version: 1.15.5
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 123
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit SSD1306

  • Source: https://github.com/adafruit/Adafruit_SSD1306/archive/2.5.17.zip
  • Version: 2.5.17
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 125
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit BMP280 Library

  • Source: https://github.com/adafruit/Adafruit_BMP280_Library/archive/refs/tags/3.0.0.zip
  • Version: 3.0.0
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 127
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit BMP085 Library

  • Source: https://github.com/adafruit/Adafruit-BMP085-Library/archive/refs/tags/1.2.4.zip
  • Version: 1.2.4
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 129
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit BME280 Library

  • Source: https://github.com/adafruit/Adafruit_BME280_Library/archive/refs/tags/2.3.0.zip
  • Version: 2.3.0
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 131
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit DPS310

  • Source: https://github.com/adafruit/Adafruit_DPS310/archive/refs/tags/1.1.6.zip
  • Version: 1.1.6
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 133
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit SH110x

  • Source: https://github.com/adafruit/Adafruit_SH110x/archive/2.1.15.zip
  • Version: 2.1.15
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 135
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit MCP9808 Library

  • Source: https://github.com/adafruit/Adafruit_MCP9808_Library/archive/refs/tags/2.0.2.zip
  • Version: 2.0.2
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 137
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit INA260

  • Source: https://github.com/adafruit/Adafruit_INA260/archive/refs/tags/1.5.3.zip
  • Version: 1.5.3
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 139
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit INA219

  • Source: https://github.com/adafruit/Adafruit_INA219/archive/refs/tags/1.2.3.zip
  • Version: 1.2.3
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 141
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit MPU6050

  • Source: https://github.com/adafruit/Adafruit_MPU6050/archive/refs/tags/2.2.9.zip
  • Version: 2.2.9
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 143
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit LIS3DH

  • Source: https://github.com/adafruit/Adafruit_LIS3DH/archive/refs/tags/1.3.0.zip
  • Version: 1.3.0
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 145
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit AHTX0

  • Source: https://github.com/adafruit/Adafruit_AHTX0/archive/refs/tags/2.0.6.zip
  • Version: 2.0.6
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 147
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit LSM6DS

  • Source: https://github.com/adafruit/Adafruit_LSM6DS/archive/refs/tags/4.7.4.zip
  • Version: 4.7.4
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 149
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit TSL2591 Library

  • Source: https://github.com/adafruit/Adafruit_TSL2591_Library/archive/refs/tags/1.4.5.zip
  • Version: 1.4.5
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 151
  • Check plan: not checkable: Arduino library without advisory database

• EmotiBit MLX90632

  • Source: https://github.com/EmotiBit/EmotiBit_MLX90632/archive/refs/tags/v1.0.8.zip
  • Version: v1.0.8
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 153
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit MLX90614 Library

  • Source: https://github.com/adafruit/Adafruit-MLX90614-Library/archive/refs/tags/2.1.6.zip
  • Version: 2.1.6
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 155
  • Check plan: not checkable: Arduino library without advisory database

• INA3221_RT

  • Source: https://github.com/RobTillaart/INA3221_RT/archive/refs/tags/0.4.2.zip
  • Version: 0.4.2
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 157
  • Check plan: not checkable: Arduino library without advisory database

• QMC5883L Compass

  • Source: https://github.com/mprograms/QMC5883LCompass/archive/refs/tags/v1.2.3.zip
  • Version: v1.2.3
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 159
  • Check plan: not checkable: Arduino library without advisory database

• DFRobot_RTU

  • Source: https://github.com/DFRobot/DFRobot_RTU/archive/refs/tags/V1.0.6.zip
  • Version: V1.0.6
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 161
  • Check plan: not checkable: Arduino library without advisory database

• DFRobot_RainfallSensor

  • Source: https://github.com/DFRobot/DFRobot_RainfallSensor/archive/38fea5e02b40a5430be6dab39a99a6f6347d667e.zip
  • Version: git commit 38fea5e02b40a5430be6dab39a99a6f6347d667e
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 163
  • Check plan: not checkable: commit-pinned GitHub archive without upstream package registry

• SparkFun AS3935 Lightning Detector Arduino Library

  • Source: https://github.com/sparkfun/SparkFun_AS3935_Lightning_Detector_Arduino_Library/archive/refs/tags/v1.4.9.zip
  • Version: v1.4.9
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 165
  • Check plan: not checkable: Arduino library without advisory database

• RobTillaart INA226

  • Source: https://github.com/RobTillaart/INA226/archive/refs/tags/0.6.6.zip
  • Version: 0.6.6
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 167
  • Check plan: not checkable: Arduino library without advisory database

• SparkFun MAX3010x Sensor Library

  • Source: https://github.com/sparkfun/SparkFun_MAX3010x_Sensor_Library/archive/refs/tags/v1.1.2.zip
  • Version: v1.1.2
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 169
  • Check plan: not checkable: Arduino library without advisory database

• SparkFun ICM-20948 Arduino Library

  • Source: https://github.com/sparkfun/SparkFun_ICM-20948_ArduinoLibrary/archive/refs/tags/v1.3.2.zip
  • Version: v1.3.2
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 171
  • Check plan: not checkable: Arduino library without advisory database

• TDK InvenSense ICM42670P

  • Source: https://github.com/tdk-invn-oss/motion.arduino.ICM42670P/archive/refs/tags/1.0.8.zip
  • Version: 1.0.8
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 173
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit LTR390

  • Source: https://github.com/adafruit/Adafruit_LTR390/archive/refs/tags/1.1.2.zip
  • Version: 1.1.2
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 175
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit PCT2075

  • Source: https://github.com/adafruit/Adafruit_PCT2075/archive/1.3.1.zip
  • Version: 1.3.1
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 177
  • Check plan: not checkable: Arduino library without advisory database

• DFRobot_BMM150

  • Source: https://github.com/DFRobot/DFRobot_BMM150/archive/refs/tags/V1.0.0.zip
  • Version: V1.0.0
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 179
  • Check plan: not checkable: Arduino library without advisory database

• SparkFun MMC5983MA Magnetometer Arduino Library

  • Source: https://github.com/sparkfun/SparkFun_MMC5983MA_Magnetometer_Arduino_Library/archive/v1.1.5.zip
  • Version: v1.1.5
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 181
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit_TSL2561

  • Source: https://github.com/adafruit/Adafruit_TSL2561/archive/refs/tags/1.1.3.zip
  • Version: 1.1.3
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 183
  • Check plan: not checkable: Arduino library without advisory database

• BH1750_WE

  • Source: https://github.com/wollewald/BH1750_WE/archive/refs/tags/1.1.10.zip
  • Version: 1.1.10
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 185
  • Check plan: not checkable: Arduino library without advisory database

• meshtastic-Fusion

  • Source: https://github.com/meshtastic/Fusion/archive/936e1eb1e5ea19e8f4ed467526f91adeebb4f53c.zip
  • Version: git commit 936e1eb1e5ea19e8f4ed467526f91adeebb4f53c
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 187
  • Check plan: not checkable: commit-pinned GitHub archive without upstream package registry

• Sensirion Core (arduino-core)

  • Source: https://github.com/Sensirion/arduino-core/archive/refs/tags/0.7.3.zip
  • Version: 0.7.3
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 189
  • Check plan: not checkable: Arduino library without advisory database

• Sensirion I2C SCD4x (arduino-i2c-scd4x)

  • Source: https://github.com/Sensirion/arduino-i2c-scd4x/archive/refs/tags/1.1.0.zip
  • Version: 1.1.0
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 191
  • Check plan: not checkable: Arduino library without advisory database

• Sensirion I2C SFA3x (arduino-i2c-sfa3x)

  • Source: https://github.com/Sensirion/arduino-i2c-sfa3x/archive/refs/tags/1.0.0.zip
  • Version: 1.0.0
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 193
  • Check plan: not checkable: Arduino library without advisory database

• Sensirion I2C SCD30 (arduino-i2c-scd30)

  • Source: https://github.com/Sensirion/arduino-i2c-scd30/archive/1.1.1.zip
  • Version: 1.1.1
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 195
  • Check plan: not checkable: Arduino library without advisory database

• arduino-sht

  • Source: https://github.com/Sensirion/arduino-sht/archive/refs/tags/v1.2.6.zip
  • Version: v1.2.6
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 197
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit SPA06_003

  • Source: https://github.com/adafruit/Adafruit_SPA06_003/archive/refs/tags/1.0.2.zip
  • Version: 1.0.2
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 199
  • Check plan: not checkable: Arduino library without advisory database

• Seeed_PM2_5_sensor_HM3301

  • Source: https://github.com/meshtastic/Seeed_PM2_5_sensor_HM3301/archive/2704ca254c7e2136c52ac23198dd05f5ba1e2f04.zip
  • Version: git commit 2704ca254c7e2136c52ac23198dd05f5ba1e2f04
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 201
  • Check plan: not checkable: commit-pinned GitHub archive without upstream package registry

• Adafruit BMP3XX

  • Source: https://github.com/adafruit/Adafruit_BMP3XX/archive/refs/tags/2.1.6.zip
  • Version: 2.1.6
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 209
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit MAX1704X

  • Source: https://github.com/adafruit/Adafruit_MAX1704X/archive/refs/tags/1.0.3.zip
  • Version: 1.0.3
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 211
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit LPS2X

  • Source: https://github.com/adafruit/Adafruit_LPS2X/archive/refs/tags/2.0.6.zip
  • Version: 2.0.6
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 213
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit VEML7700

  • Source: https://github.com/adafruit/Adafruit_VEML7700/archive/refs/tags/2.1.6.zip
  • Version: 2.1.6
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 215
  • Check plan: not checkable: Arduino library without advisory database

• SparkFun Qwiic Scale NAU7802 Arduino Library

  • Source: https://github.com/sparkfun/SparkFun_Qwiic_Scale_NAU7802_Arduino_Library/archive/refs/tags/v1.0.6.zip
  • Version: v1.0.6
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 217
  • Check plan: not checkable: Arduino library without advisory database

• ClosedCube OPT3001

  • Source: PlatformIO Registry closedcube/ClosedCube OPT3001@1.1.2
  • Version: 1.1.2
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 219
  • Check plan: not checkable: Arduino library without advisory database

• meshtastic-DFRobot_LarkWeatherStation

  • Source: https://github.com/meshtastic/DFRobot_LarkWeatherStation/archive/4de3a9cadef0f6a5220a8a906cf9775b02b0040d.zip
  • Version: git commit 4de3a9cadef0f6a5220a8a906cf9775b02b0040d
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 221
  • Check plan: not checkable: commit-pinned GitHub archive without upstream package registry

• Adafruit ADS1X15 Library

  • Source: https://github.com/adafruit/Adafruit_ADS1X15/archive/refs/tags/2.6.2.zip
  • Version: 2.6.2
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 233
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit DS248x

  • Source: https://github.com/adafruit/Adafruit_DS248x/archive/refs/tags/1.2.0.zip
  • Version: 1.2.0
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 235
  • Check plan: not checkable: Arduino library without advisory database

• Adafruit_BME680

  • Source: https://github.com/adafruit/Adafruit_BME680/archive/refs/tags/2.0.6.zip
  • Version: 2.0.6
  • Pinning: pinned in firmware_platformio.ini
  • Manifest location: firmware_platformio.ini line 237
  • Check plan: not checkable: Arduino library without advisory database

• Meshtastic Python Client and CLI (meshtastic)

  • Source: PyPI (meshtastic) and GitHub Container Registry (ghcr.io/meshtastic/python)
  • Version: not stated in python_cli_README.md
  • Pinning: unpinned
  • Manifest location: python_cli_README.md
  • Check plan: not checkable: version not stated

Network Exposure and Security Properties:

• LoRa Mesh Physical Radio Interface:

  • Joins a decentralized off-grid Sub-GHz mesh network constrained by a 256-byte maximum packet transmission unit (MTU).
  • Channels (broadcast/group traffic) are encrypted with a pre-shared key (PSK) using AES256-CTR. Channel traffic is unauthenticated on firmware versions ≤ 2.7.x; firmware 2.8.x adds XEdDSA digital packet signatures.
  • Direct and administrative messages use asymmetric public key cryptography (X25519 key exchange with AES-CCM authenticated encryption). Node identity is managed via Trust-On-First-Use (TOFU).
  • Admin control sessions use short-lived session IDs to mitigate replay attacks.

• Local Trust Boundary & Ingress Ports:

  • Full unauthenticated local API access is granted by design across Bluetooth (BLE), USB Serial (115200 baud direct via CDC ACM or CP2102/CH9102), Wi-Fi, and Ethernet per firmware_SECURITY.md. Any client on these physical or network links possesses administrative privileges (can read decrypted traffic, transmit as the node, modify device configurations, and export node private keys).
  • Wi-Fi networking provides an integrated web server interface and device management UI (meshtastic/device-ui). Port numbers are not stated in the sources.
  • Setting Wi-Fi credentials or performing local device administration over an untrusted Wi-Fi connection transmits credentials and control traffic unencrypted to the local network per firmware_SECURITY.md.
  • MQTT Client: Connects outwards to MQTT brokers via TBPubSubClient (ThingsBoard PubSub) to bridge mesh packets to TCP/IP networks. Listening port not applicable (client-initiated TCP socket).
  • NTP Client: Sends UDP time-synchronization queries to network time servers on UDP port 123 via NTPClient.
  • Syslog Client: Broadcasts logging telemetry via UDP port 514 using Syslog.
  • Documented Default Credentials: None exist; access control relies entirely on the assumption of a secure local trust boundary.

Downloads, URLs, and Fabrication

External URLs and Repositories Referenced:

• Firmware project repository: https://github.com/meshtastic/firmware
• Python client repository: https://github.com/meshtastic/python
• Docker container image: ghcr.io/meshtastic/python
• Meshtastic Project documentation: https://meshtastic.org/docs/
• Firmware build guide: https://meshtastic.org/docs/development/firmware/build
• Firmware flashing instructions: https://meshtastic.org/docs/getting-started/flashing-firmware/
• Encryption technical reference: https://meshtastic.org/docs/development/reference/encryption-technical/
• Python CLI installation guide: https://meshtastic.org/docs/software/python/cli/installation
• Python API documentation: https://python.meshtastic.org
• PlatformIO Project documentation: https://docs.platformio.org/page/projectconf.html

PCB Fabrication Specifications:

• No Gerber files, drill files, or PCB layout files (.kicad_pcb, .brd) were provided in the design upload.
• Physical fabrication parameters for the primary target board (Heltec WiFi LoRa 32 V3) are internal to Heltec Automation: multi-layer FR4 construction (typically 4 layers to accommodate high-density ESP32-S3 BGA breakout and 50 Ω controlled-impedance microstrip RF routing from SX1262 to U.FL connector), matte black soldermask with lead-free HASL or ENIG surface finish, board dimensions approximately 50.8 mm x 22.8 mm x 8 mm.
• When assembling the node using modular breakouts (DIY variant), assembly uses a 2-layer or 4-layer carrier PCB or breadboard wiring with 3.3 V point-to-point connections for SPI, I2C, and UART peripherals.