ADC reading fluctuates when updating characteristic value (notify)

[xproto]

Hi I developed a program in zephyr that reads ADC unfortunately I stumbled upon a bug which can not be solved currently.

https://github.com/zephyrproject-rtos/zephyr/issues/25917

So I created a new code with SES based on ble_app_template + saadc reading examples. Debug log values is stable but when updating the values over ble the adc values fluctuates like it has some kind of pattern. Btw I changed the saadc SAMPLES_IN_BUFFER from 5 to 50, then take its average.

Here is the debug log which shows it has small deviation

Here is the app view which has a large fluctuation and creates some pattern.

[JONATHAN LL]

Hi,

Can you provide a table of values directly form the SAADC and the vale that is received over BLE. If the values are stable before being transmitted then it is either e error wrong values that is sent or something is happening when send/receive is tacking place. 

Regards,
Jonathan