data from analog device ir sensor

Question

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

Thanks&Regards 
 pspavi

Ivan Herrera · Answer

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

Jagbir · Answer

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.

data from analog device ir sensor

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