RE: how to C program to send data by GATT service characteristic value

Martin Lesund — Wed, 21 Mar 2018 12:46:25 GMT

Hello Jun,

If you are a beginner I would advise you to check out the links on this thread for guidance.

I assume that you will be using SDK v12.3? If not I would recommend you to use that SDK version since it's the latest for the nRF51 series. and you should also use Softdevice s130. (compatibility matrix)

Your application seems simple enough and should be possible for you to achieve by checking out this Tutorial made by Bjorn. It shows you in step 5 how you can read out the Temperature data from a sensor via TWI and you could use the "ble_app_uart" example as reference on how to send the sensor data to a central (phone etc..)

To acquire more knowledge on how BLE works, you should check out these tutorials:

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