ArduinoJSON Library has breaking changes.

[cpyarger]

since update 5.13.3 There have been breaking changes in the ArduinoJSON Library.

Also, MILLION is not defined.

[newbee112]

any idea what version that work? i have tried plenty but still get the million not defined error...

[nkleven]

+1

[nkleven]

@newbee112 just download 5.12.0 version of ArduinoJSON, change the 'MILLION' in the mentioned h file line and character position. Recompile and you should be good to go!

[h0jeZvgoxFepBQ2C]

See also this PR regarding MILLION: https://github.com/bruhautomation/ESP-MQTT-JSON-Digital-LEDs/pull/71/files