Using AMPL with Node red

[Colin]

By the way, others here have solved the irrigation problem by using PID control of the water injection to control soil moisture content.

Also I think the DHT22 is considered a poor sensor, by some at least. See

DHTT22 zero values

Have been using node-red-contrib-dht-sensor with DHT22 sensor showing zero values in temperature and humidity : (object _msgid: "2bea0790.4d4168" topic: "rpi-dht22" payload: "0.00" humidity: "0.00" isValid: false errors: 4 sensorid: "dht22" }. Anyone has any idea what went wrong? I'm using the Physical Pin Rev.2 with pin 15. All other grounded + power(3.3) are placed correctly. Much Appreciated