Heltec WiFi LoRa 32 V3 SPI, I2C, OLED I2C, and Serial Pins.
Heltec WiFi LoRa 32 V3 pin assignments are defined in the pins_arduino.h deep within the local file store for the board manager support package that corresponds with that board. Let's take a closer look.
If you download Arduino 1.8x and install it on a PC, the file you are looking for is here
C:\Users\user_name\AppData\Local\Arduino15\packages\Heltec-esp32\hardware\esp32\0.0.7\variants\WIFI_LoRa_32_V3
Heltec Lora ESP32 Playlist
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