Ok so heres a weird one! Hopefully someone can help as I'm loosing my will lol.
I'm using rpi3b+ with latest venus 260-34. I've made a circuit using mcp3208 and resistors and lm335 sensor.
I have my temperature reading no problem but...... as the temp goes up the reading goes down and if I cool the sensor the reading goes up??? If i swap the terminals around I get either the disconnected or reverse polarity or unknown message.
The tank sendors/reading is correct and stable using the same vref and mcp3208.
Any help ideas greatly appreciated
Thanks