Heltec WiFi LoRa 32(V3) / Wireless shell(V3) / Wireless stick lite (V3) Development Board Pinout and Technical Specifications
Code name: heltec_wifi_32_lora_V3
Heltec WiFi LoRa 32(V3) / Wireless shell(V3) / Wireless stick lite (V3) development board is based on esp32s3 microcontroller and uses xtensa architecture. This development board has a maximum CPU frequency of 240 MHz and a flash size of 8MB.
Features
- 48 digital IO pins
- 46 external interrupt pins
- 20 analog input pins
- 27 PWM pins
Connectivity
- WiFi: 802.11 b/g/n (2.4 GHz)
- Bluetooth: 5.0
- WiFi: 5.0
Technical specs
| Clock Speed | 240 MHz |
| Flash size | 8MB |
| Microcontroller | esp32s3 |
| Architecture | xtensa |
Heltec WiFi LoRa 32(V3) / Wireless shell(V3) / Wireless stick lite (V3) Pinout
Heltec WiFi LoRa 32(V3) / Wireless shell(V3) / Wireless stick lite (V3) Pins Mapping Arduino IDE
Below you can find the Heltec WiFi LoRa 32(V3) / Wireless shell(V3) / Wireless stick lite (V3) pinout. This development board provides 48 digital IO pins, out of which 46 can be used as an external interrupt pins , 20 as analog input pins and 27 pins have Pulse-Width Modulation (PWM) .
| Pin | Analog | Touch | PWM | Other |
|---|---|---|---|---|
| 1 | A0 | T1 | PWM | |
| 2 | A1 | T2 | PWM | |
| 3 | A2 | T3 | PWM | |
| 4 | A3 | T4 | PWM | |
| 5 | A4 | T5 | PWM | |
| 6 | A5 | T6 | PWM | |
| 7 | A6 | T7 | PWM | |
| 8 | A7 | T8 | PWM | SS |
| 9 | A8 | T9 | PWM | SCK |
| 10 | A9 | T10 | PWM | MOSI |
| 11 | A10 | T11 | PWM | MISO |
| 12 | A11 | T12 | PWM | |
| 13 | A12 | T13 | PWM | |
| 14 | A13 | T14 | PWM | |
| 15 | A14 | PWM | ||
| 16 | A15 | PWM | ||
| 17 | A16 | PWM | SDA_OLED | |
| 18 | A17 | PWM | SCL_OLED | |
| 19 | A18 | PWM | ||
| 20 | A19 | PWM | ||
| 21 | PWM | RST_OLED | ||
| 35 | PWM | LED | ||
| 36 | PWM | Vext | ||
| 41 | PWM | SDA | ||
| 42 | PWM | SCL | ||
| 43 | PWM | TX | ||
| 44 | PWM | RX | ||
| 48 | LED_BUILTIN |
Default Tools
| Bootloader tool | esptool_py |
| Uploader tool | esptool_py |
| Network uploader tool | esp_ota |
| Bootloader address | 0x0 |
| Flash mode | dio |
| Boot mode | qio |
| PSRAM type | qspi |
| Maximum upload size | 3264 Kb (3342336 B) |
| Maximum data size | 320 Kb (327680 B) |
The Heltec WiFi LoRa 32(V3) / Wireless shell(V3) / Wireless stick lite (V3) development board by default uses esptool_py uploader tool, esp_ota network uploader tool for Over-the-air (OTA) uploads and esptool_py bootloader tool. The bootloader starts at address "0x0". Flash mode and boot mode for Heltec WiFi LoRa 32(V3) / Wireless shell(V3) / Wireless stick lite (V3) development board by default is dio and qio respectively. The board uses qspi PSRAM type. When using Arduino IDE, the maximum sketch upload size is 3264 Kb (3342336 B) and maximum data size for variables is 320 Kb (327680 B).