Binary data from BLE device's notification gets wrong encoding

[kopierschnitte]

I was struggeling about wrong binary values returned from one of my BLE endpoints. Somehow, they've been converted or encoded in a wrong way. This was an issue long time ago: #42

EspruinoHub/lib/connect.js

Line 425 in 9c9b817

connection.services[serviceUUID][characteristicUUID].notifyCallback(data.toString("binary"));

If I remove the "binary" argument of the conversion, the values are correct. At least for my use case.
Maybe someone is facing similar problems ;-)

[gfwilliams]

Thanks for the update! Please could you let us know what the values were that you were having trouble with, and maybe what you saw on MQTT?

[kopierschnitte]

That's a little bit complicated: The device (pool chemical sensor) sent back 12 bytes (as expected) and the values were simply wrong.
I saw nothing special in the logs, even with DEBUG enabled.
I guess that the data got somehow treatend as UTF8?