Write commands from react native application

Thank you all for the help! I tried uploading the example code to the puck, but when I connect to it from the react native app and printing out all characteristics, I can't seem to find the one I supposedly created using NRF.setServices().
Am I doing something completely wrong that you can see? When using the same RN library reading from a MDBT42Q it works well.

Espruino Code:

console.log(NRF.getAddress());
console.log(NRF.getBattery());

NRF.setServices({
  0xBCDE : {
    0xABCD : {
      value: 'hi',
      writable : true,   // optional, default is false
      notify : true,   // optional, default is false
      indicate : true,   // optional, default is false
      description: "My Characteristic",  // optional, default is null,
      onWrite : function(evt) {
        console.log(evt.data);
      }
    }
  }
});

RN code:

componentDidMount() {
        const bleManager = new BleManager();

        bleManager.startDeviceScan(null, null, async (err, device) => {
            if (err) console.log(err)
            else {
                if (device.localName === DEVICE_NAME) {
                    bleManager.stopDeviceScan()

                    const deviceId = device.id;
                    console.log(`Trying to connect to device with MAC: ${deviceId}`);

                    try {
                        const device = await bleManager.connectToDevice(deviceId).the­n(d => d.discoverAllServicesAndCharacteristics(­));
                        const svcs = await device.services();
                        console.log('try')
                        for (let ii = 0; ii < svcs.length; ++ii) {
                            const currentService = svcs[ii];
                            let characteristics = await currentService.characteristics();
                            for (let jj = 0; jj < characteristics.length; ++jj) {
                                const currentCharacteristic = characteristics[jj];
                                console.table(currentCharacteristic);
                                if (currentCharacteristic.uuid === CHARACTERISTIC_UUID {


                              
                                    console.table(currentCharacteristic);
                                    const cc = await currentCharacteristic.writeWithoutRespon­se(
                                        btoa('1111111')
                                    )
                                    
                                    console.table(currentCharacteristic);

                                }


                            }
                        }
                    }
                    catch (e) {
                        console.log(e)
                    }
                }
            }
        })
    }