Evothings

Hi there.

I used the LightBlue app on my Mac to get the details from my heart rate tracker device.



So in my logging code, I can see that I'm getting the right service, characteristic and descriptor info.



Is there some example code that will help me get the ASCII details for the characteristic?

You want the function "readCharacteristic".

We have no example that reads all characteristics on a device, but our example mbed-custom-gatt reads one characteristic in a fairly straightforward way.

"readCharacteristic" returns not a string, but an ArrayBuffer. You can use evothings.ble.fromUtf8() to try to convert the buffer to a string. Be warned, however: it will throw an exception if the buffer contains unreadable(binary) data. You can surround the call to fromUtf8() with try/catch statements to be on the safe side.

Is there a working example of readCharacteristic() anywhere? I too am trying to read the value of a characteristic and I can not seem to get it to work.

Like I said, mbed-custom-gatt. Here's the interesting file: https://github.com/evothings/evothings-examples/blob/master/examples/mbed-custom-gatt/app.js