Evothings

Certainly seems like an electrical problem. You would want to shield the nrf51 chip from the noise somehow, but how do to that is out of my area of expertise. You might try asking on the Nordic forum.

I'm afraid the documentation mentions no such capability in the screen's default firmware. To add new features, you would have to modify the firmware, presumably by using their "BLE-STACK V2.1".

The docs say Display Data size is 1-16 bytes. "Hello World Test!" is 17 bytes. Try a shorter string.

Looks like the SensorTag doesn't have the characteristic "f000ad02-0451-4000-b000-000000000000", as I thought it would. The documentation only says "ad02", so we'd have to guess at the rest of the UUID... except you can use the BLE Discovery example to get a complete list. So do ...

I suspect "cordova-plugin-bluetoothle" and "com.evothings.ble" will conflict with each other. Suggest you pick only one of them.

When using our tisensortag library, it's as easy as saying "On" or "Off" for the sensor of interest. See an example.

They do not. Classic Bluetooth uses a number of Profiles on top of the "RFCOMM" serial protocol.

No, it is quite different. You scan for devices in a similar manner, but with BLE you can get extra advertising data. (It is this advertising data that is used to create the Beacon protocols.) You can pair and connect to devices in a similar manner, but once connected things become different. Classi...

I would change the line "console.log(e);" to "console.log(JSON.stringify(e));" for more detail on the error.

Like I said, I would hope they're running the standard Running Speed and Cadence service. They might also provide the Heart Rate and Pulse Oximeter services.