Water pressure sensor for central heating

[wolfred]

ok, @BartButenaers, done. Thank your for your image

Reading analog gauge values in NodeRED

I need to get the numeric value every 5 minutes from an analog gauge. The gauge looks like this: [image] I looked in this topic some years ago and asked a question on Stack Exchange: image recognition - Reading a value of a real gauge - Artificial Intelligence Stack Exchange My assumption was, that reading a simple value of a gauge should be feasible with a Raspberry Pi or cheaper hardware, some software and little configuration. But it seems we are deep in AI here. Training various needle …