Trace to S_OUT were cut and stripped to make pads for resistor taken from R8. Wire is 0.14mm²
I tweaked the resistor value to 1.04kOhm for more accurate results.
- platform: adc
id: adc_sensor
pin: A0
update_interval: never
- name: resistance
platform: resistance
entity_category: diagnostic
id: resistance_sensor
sensor: adc_sensor
resistor: 1.04kOhm
configuration: UPSTREAM
- platform: ntc
name: 'Temperature'
id: temperature
sensor: resistance_sensor
calibration:
b_constant: 3380
reference_temperature: 25°C
reference_resistance: 10kOhm
Note, sensor terminals are not galvanic isolated from the mains power!