Tasmota/boards/esp8266_4M3M.json

{
  "build": {
    "arduino": {
      "ldscript": "eagle.flash.4m3m.ld"
    },
    "core": "esp8266",
    "extra_flags": "-DARDUINO_TASMOTA -DESP8266 -DARDUINO_ARCH_ESP8266 -DARDUINO_ESP8266_ESP01 -DESP8266_4M -DESP8266_4M3M",
    "f_cpu": "80000000L",
    "f_flash": "40000000L",
    "flash_mode": "dout",
    "mcu": "esp8266",
    "variant": "generic"
  },
  "connectivity": [
    "wifi"
  ],
  "frameworks": [
    "arduino"
  ],
  "name": "Espressif Generic ESP8266 Tasmota 1M sketch 3M FS",
  "upload": {
    "maximum_ram_size": 81920,
    "maximum_size": 995326,
    "require_upload_port": true,
    "resetmethod": "ck",
    "speed": 115200
  },
  "url": "http://www.esp8266.com/wiki/doku.php?id=esp8266-module-family",
  "vendor": "Espressif"
}