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Heltec WiFi LoRa 32 V3
HeltecESP32-S3 + SX1262
Heltec's WiFi LoRa 32 V3 pairs an ESP32-S3 with a Semtech SX1262 LoRa radio and a 0.96" SSD1306 OLED. The fixed onboard connections (LoRa SPI, OLED I2C, Vext, LED, button) are below; remaining GPIOs are broken out to the side headers. 3.3V logic.
In stock
Specifications
0No specs listed.
Pinout
17Low source legibility.The original manufacturer datasheet for this part was difficult to read, so this pinout may be incomplete or imperfect. Always confirm against the specific manufacturer’s datasheet before wiring.
| Pin | Name | Functions | Notes |
|---|---|---|---|
| 3V3 | 3V3 | POWER | 3.3V |
| 5V | 5V | POWER | 5V (USB) |
| GND | GND | GND | Ground |
| 8 | LoRa NSS | SPI | SX1262 chip select (GPIO8) |
| 9 | LoRa SCK | SPI | SX1262 SCK (GPIO9) |
| 10 | LoRa MOSI | SPI | SX1262 MOSI (GPIO10) |
| 11 | LoRa MISO | SPI | SX1262 MISO (GPIO11) |
| 12 | LoRa RST | GPIO | SX1262 reset (GPIO12) |
| 13 | LoRa BUSY | GPIO | SX1262 busy (GPIO13) |
| 14 | LoRa DIO1 | GPIO | SX1262 interrupt (GPIO14) |
| 17 | OLED SDA | I2C | SSD1306 SDA (GPIO17) |
| 18 | OLED SCL | I2C | SSD1306 SCL (GPIO18) |
| 21 | OLED RST | GPIO | SSD1306 reset (GPIO21) |
| 36 | Vext | POWER | Controls OLED/sensor power rail (GPIO36, active LOW) |
| 35 | LED | GPIO | Onboard white LED (GPIO35) |
| 0 | PRG | GPIO | User/BOOT button (GPIO0) |
| 1 | VBAT_ADC | ADC | Battery voltage read (GPIO1; enable via ADC_Ctrl GPIO37) |
Interactive pinout
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ESP32-S3 + SX1262
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