Project was designed for XIAO ESP32C3.
When multiplexer:
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multiplexer select to D4, D5, D6; COM OUT/IN to A0
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when A1 is disconnected:
- max 4 thermistors: reading from A0 and connect them to multiplexer to channels 0, 1, 2, 3
- max 4 potentiomters: reading from A0 and connect them to multiplexer to channels 4, 5, 6, 7
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when A1 is grounded:
- no thermistors
- max 4 potentiomters: reading from A0 and connect them to multiplexer to channels 0, 1, 2, 3
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when A1 is connected to high:
- max 4 thermistors: reading from A0 and connect them to multiplexer to channels 0, 1, 2, 3
- no potentiomters
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fan connected to D2 (A2)
When no multiplexer:
- connect together pins D4, D5, D6
- max 3 potentiomters connected to A0, A1, A2
- fan connected to D4