how to reading from NTC thermistor in NCS1.9.1?

[yoyou]

Hello,

NCS1.9.1, nRF52840DK,  Windows10 X64, VS Code,

1.

i want to read voltage from RT_ADC pin (P0.04),

and than converting NTC thermistor value to Temperature.

2.

read battery Voltage;

  

is there any sample code?

          

thanks

Best Regards

[Jørgen Holmefjord]

Hi,

You can find general ADC sample and battery voltage sample in Zephyr:

• Analog-to-Digital Converter (ADC)
• Battery Voltage Measurement

There is also an un-official example in this GitHub repository. This is written for the nRF9160, but it should work for the SAADC in nRF52 devices as well.

Best regards,
Jørgen

[yoyou]

Hi,Jørgen

thanks for reply,

the project v1.9.1\zephyr\samples\boards\nrf\battery,

the project v1.9.1\samples/drivers/adc

how to write overlay file for nRF52840DK (NTC pin P0.04)?

   

github.com/.../main.c

the voltage for what pin?

what is the raw value ?  for which pin?

         

Best regards,