ESP8266 PID controller for Gaggia Classic espresso machine
Query target temp, uptime, and actual temp:
curl -v xxx.xxx.xxx.xxx/json
Set the new target temp:
curl -d "setpoint=200" -X POST xxx.xxx.xxx.xxx/set
Set PID parameters:
curl -d "kp=1.0&ki=0.5&kd=0.1" -X POST xxx.xxx.xxx.xxx/set
Save config to EEPROM:
curl -X POST xxx.xxx.xxx.xxx/save