| GENERAL |
| Type: | LoRa RF development board |
| Frequency range: | 863-928 MHz |
| Frequency stability: | ? ppm |
| Mode: | Chirp Spread Spectrum |
| Power supply: | 3.3-5 VDC (Via header, battery interface or USB) |
| Current drain / power consumption: | Less than 500 mA |
| Antenna impedance / connector: | 50 ohm / IPEX (U.FL) |
| Dimensions (W*H*D): | 50*26*10 mm (1.97*1.02*0.39") |
| Weight: | ? g (? oz) |
| Other features: |
0.96"128*64 dot matrix OLED display. BMS for 3.7 V lithium battery.
Arduino development environment is supported.
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| LoRa RF SECTION |
| LoRa chipset: | SX1262 |
| Receiver sensitivity: |
| Sensitivity | @Bandwidth | @Spreading factor |
| -137 dBm / 0.03 uV | 125 KHz | 12 |
| -130 dBm / 0.071 uV | 125 KHz | 10 |
| -124 dBm / 0.14 uV | 125 KHz | 7 |
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| Max RF output power: | 21±1 dBm / 100-158 mW |
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| DIGITAL SECTION |
| Master chipset: | ESP32-S3FN8 (32-bit LX7 dual core) |
| Memory: |
ROM: 384 KB
SRAM: 512 KB
RTC SRAM: 16 KB
SiP flash: 8 MB
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| USB: | Type C connector. CP2102 chip |
| Wireless: |
WiFi: 802.11 b/g/n up to 150 Mbps
Bluetooth: BLE, BT5 and BT mesh
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| Pinout: | A total of 36 pins on two headers
GPIO, ADC, UART, I2C, SPI and more |
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| MISCELLANEOUS |
| Manufactured: | China, 2022-202x |
| Additional info: |
Version 3 hardware revisions
v3 (2022-09-15)
Initial version 3 release.
v3.1
Removed the ideal diode part.
Increased the 2.4 GHz RF and crystal distance.
Changed the USB type-C port to support C-C.
v3.2
Vext changed to LDO.
Modified the layout according to espressif's suggestions.
Modified the problem of easy adhesion of some parts.
The charging chip is changed to LGS4056H.
Modified voltage detection circuit, now need to pull up the ADC-Ctrl (GPIO 37).
This is a popular board among Meshtastic users.
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| Related documents: |
User manual (1.2 MB)
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| Modifications and fixes: | |
| Reviews: | |
| Options / Accessories: |
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