Tricks for determining different esp32 board types

[gcjr]

working with TTGO esp32, EzSBC esp32 , esp8266 NodeMCU Lolin v3, ... and wondering if there's any way to determine the board type either from compiler defines or querying something on the board (GPIO pin pullups)?

[gfvalvo]

Look in boards.txt and find the board of interest. Then look for the "build.board" entry. For example Adafruit ESP32 Feather:

featheresp32.build.board=FEATHER_ESP32

Prepend "ARDUINO_" to the name and use it in a preprocessor conditional statement:

#ifdef ARDUINO_FEATHER_ESP32
// Adafruit ESP32 Feather - specific code here.
#endif

void setup() {
}

void loop() {
}