Evothings

device.uuid is just an alphanumeric string. The format is different from platform to platform. You should be able to enter any string of your choosing.

However, you will probably also need to enter the same string on the MQTT server, so that it will recognize your client.

You don't connect to services, only to devices. Once connected to a device, you may write to (or read from) characteristics and descriptors.

I assume you mean that your function app.receivedData() is never called.

You'll then need to add this line to the end of the app.js file:

Our BLE plugin is named "cordova-plugin-ble". That's the one you'll need.

OK, so if you have the javascript string "0b5ac7b1206a15531553038715530187", then that's too long for BLE writing, because there's a limit of 20 bytes per characteristic.

Perhaps you should treat it as hex bytes, like so:

data = new Uint8Array([0x0b, 0x5a, 0xc7, ...])

Our arduino-ble example uses a form of BLE UART. Check out its app.js file. The functions "on", "off", "write", "startReading" and "getServices" will be of interest.

Yes, it is!

For example, we have a TI SensorTag Demo you might like.

I'll try to help, but I'm a bit confused. The value you want to write seems to be identical to the characteristic's UUID. Is that correct? The function you've written takes the parameter "resultCode", assumes it is a string, then writes the ASCII representation of that string to the charac...

Does wC() return asynchronously, and register the callback to be called when the value actually gets written? Yes. It also depends a bit on the remote device. There are two types of characteristic write settings: with and without response. The remote decides which one must be used. In the first cas...

The cordova-ble plugin queues up all writes. The next pending write is executed when the remote device's response arrives. Queing more writes over time than the system can process will cause increasingly old data to be written to the remote, and eventually cause an out-of-memory crash. I suggest you...