Tasmota/boards/esp32_4M.json

{
  "build": {
    "arduino":{
      "ldscript": "esp32_out.ld"
    },
    "core": "esp32",
    "extra_flags": "-DARDUINO_ESP32_DEV -DESP32_4M",
    "f_cpu": "80000000L",
    "f_flash": "40000000L",
    "flash_mode": "dout",
    "mcu": "esp32",
    "variant": "esp32",
    "partitions": "esp32_partition_app1856k_spiffs320k.csv"
  },
  "connectivity": [
    "wifi",
    "bluetooth",
    "ethernet",
    "can"
  ],
  "debug": {
    "openocd_board": "esp-wroom-32.cfg"
  },
  "frameworks": [
    "arduino",
    "espidf"
  ],
  "name": "Espressif Generic ESP32 4M Flash, Tasmota 1856k Code/OTA, 320k SPIFFS",
  "upload": {
    "flash_size": "4MB",
    "maximum_ram_size": 327680,
    "maximum_size": 4194304,
    "require_upload_port": true,
    "speed": 460800
  },
  "url": "https://en.wikipedia.org/wiki/ESP32",
  "vendor": "Espressif"
}