Heltec WiFi Kit 32(V3) is a development board based on the ESP32S3 microcontroller using XTENSA architecture.
This board features a maximum CPU frequency of 240 MHz and 8MB flash memory.
About Heltec WiFi Kit 32(V3)
An ESP32-S3 board with integrated OLED display and LoRa capabilities, designed for wireless communication projects.
📋 Technical Specifications
Complete technical specification details for Heltec WiFi Kit 32(V3)
🖥️ Display
🛰️ Connectivity
🧠 Microcontroller
✨ Features & Pins
Heltec WiFi Kit 32(V3) Pinout Diagram
Complete pin reference for Heltec WiFi Kit 32(V3)
Useful Links
Datasheets and resources for Heltec WiFi Kit 32(V3)
Pin Mappings
Complete pinout and GPIO mapping for Heltec WiFi Kit 32(V3)
| Pin | Analog | Touch | PWM | Other |
|---|---|---|---|---|
| 0 | KEY_BUILTIN | |||
| 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 | SDA RST_OLED | ||
| 22 | PWM | SCL | ||
| 35 | LED_BUILTIN LED | |||
| 36 | Vext | |||
| 43 | TX | |||
| 44 | RX |
Default Tools & Configuration
Build and upload settings for Heltec WiFi Kit 32(V3)
| Setting | Value |
|---|---|
| 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 bytes) |
| Maximum data size | 320 KB (327680 bytes) |
The Heltec WiFi Kit 32(V3) uses esptool_py for uploads , esp_ota for OTA updates, and esptool_py bootloader at 0x0.
Flash mode: dio | Boot mode: qio | PSRAM: qspi
Max sketch size: 3264 KB | Max data size: 320 KB
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