Data formatting for write

I’m trying to write, and getting this error: BleError: Characteristic * write failed for device * and service *

I believe it’s an issue with the formatting of the write data. The bluetooth device is expecting a data array, specifically something like this:
[ 0, 0, 173, 0, 129, 164, 116, 121, 112, 101, 170, 100, 105, 97, 103, 110, 111, 115, 116, 105 ]

It seems the lib wants the above to converted to a string. When I convert it to a base64 string, the bluetooth device fails to write. Anyone know how to write a data array?

[mazenchami]

@heatherSnepenger my hardware is also initially expecting a byte array, and I haven’t had any issues with my example below. Here is how i’m doing mine (keep in mind this could be specific to my device):

import { Buffer } from 'buffer';
...
const readSingleWifiShortHex = [parseInt('0xAB', 16), parseInt('0x01', 16), parseInt('0x01', 16)];
const readSingleWifiShortBase64 = new Buffer(readSingleWifiShortHex).toString('base64');
return await device.writeCharacteristicWithResponseForService(serviceUUID, characteristicUUID, readSingleWifiShortBase64, singleWifiShortTransactionId)
            .then(async characteristic => await console.log('characteristic', characteristic))
...

for readSingleWifiShortHex, index 0 = the command, 1 = length, 2 = payload.

does that help?

[mazenchami]

@ayberkgerey I am creating my own transactionId that way I can use it to read later on in my code/file.