data from analog device ir sensor

[ps_anu]

Hi ...

how to get the data from analog sensor and pass via ble app

Thanks&Regards 

pspavi

[Ivan Herrera]

In the SDK there's an SAADC example that shows you how to read out a voltage on one of the analog pins. Depending on the application of the sensor you could use one of the existing services or create a custom BLE-service to read out and notify your data to the app. I personally used this tutorial to create a custom service.

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.0.0/nrf_dev_saadc_example.html

https://github.com/bjornspockeli/custom_ble_service_example

[ps_anu]

yes thank you ... i tried but  i am not getting the correct readings from sensor . i am getting like this ...

please check with this 

[Ivan Herrera]

What Nordic board and which IR sensor are you using? Are you sure you connected the sensor to the correct pin? If possible could you provide a picture of your setup? 

[Jagbir]

In the SAADC example your ADC output should be Vdd * 284.44 on putty terminal. For the nRF52840-DK, the Vdd is 3.0 V.You can measure the output of IR sensor in volts using a multi-meter and that value multiplied by 284.44 should be your output on the terminal.You need to connect the output of of your sensor to P.0.02 on the DK.

[ps_anu]

connections done between the analog ir sensor and nRF52840 ... BLUE (analog pin of sensor)

WHITE (Gnd)

GREY (Sensor supply)