Table of Contents
Components
Most of my component recommendations are in Buyer's Guide.
Microcontroller Development Boards
Espressif ESP32
Nordic nRF52840
STMicro STM32WL
STM32WLEx product page; note that this MCU has an integrated Semtech SX1262.
Meshtastic firmware support is still WIP (booting and functional, but no writeable configuration storage); see [Board]: STM32WL (Seeed Studio Wio-E5) #2539
LoRa Modules
Note: Meshtastic only supports modules with SPI connectivity; UART modules are not supported.
Semtech SX1262
EBYTE E22-900M30S
- Product page: EBYTE E22-900M30S
- Features
- Tx PA: +10 dBm (maximum output power: 30 dBm)
- Rx LNA: +2 dBm (-150 dBm Rx sens. versus stock -148 dBm)
Note: Transmit power of SX1262 must be configured per the table below to achieve the desired transmit power (data provided by EBYTE by email):
| SX1262 Tx Power (dBm) | Actual Tx Power at 868 MHz (dBm) | VIN Current (mA) |
|---|---|---|
| 20 | 30.54 | 618.12 |
| 17 | 27.98 | 518.43 |
| 14 | 24.75 | 440.35 |
| 11 | 21.73 | 398.87 |
| 8 | 18.81 | 377.56 |
| 5 | 15.67 | 366.21 |
| 2 | 12.88 | 352.61 |
| -1 | 9.92 | 344.76 |
EBYTE E22-900M33S
- Product page: EBYTE E22-900M33S
- Features
- Tx PA: +25 dBm (maximum output power: 33 dBm)
- Rx LNA: ? dBm (typical receive sensitivity: -135 dBm
Note: Transmit power of SX1262 must be configured per the table below to achieve the desired transmit power (from datasheet page 5):
| SX1262 Tx Power (dBm) | Actual Tx Power at 850 MHz (dBm) |
|---|---|
| 8 | 33.0 |
| 5 | 31.6 |
| 3 | 30.0 |
| 0 | 27.2 |
| -3 | 23.6 |
| -6 | 20.4 |
| -9 | 17.2 |