Several issues with BLE services

[MarkusPiotrowski]

Hi,
I'm actually testing some bluetooth services and am experiencing several problems. Some of them are already known.

1. Accelerometer data over BLE does not work
   As reported by @smartyw in accelerometer data over Bluetooth does not work #7.

2. Callibration of compass not possible if Bluetooth-IO-Pin-Dienst is working.
   I'm not sure if this is related to Draw a circle to calibrate the compass is impossible #4. However, calibration fails with the last dot of the cirlce and shows several times 'sad face'-020. When not using the Bluetooth-IO-Pin-Dienst compass calibration works nicely.

3. The 'compass calibration' service is missing
   This bluetooth characteristic (E95DB358-251D-470A-A062-FA1922DFA9A8) is available on the micro:bit. It can be used to invoke the compass calibration.
   The 'problem' is that some libraries, eg. python-bluezero (https://github.com/ukBaz/python-bluezero), are expecting this service, so you cannot use this libraries without manually patching them.

I'm using a 'new' Calliope (name on left side below A button, '1.3' on the back-side right to the USB port).

Regarding topic 1 I think that @smartyw has already gave you some hints where the problem may be located.

Do you think that you will address this issues in the near future? E.g. #7 is from June 2018.

Some response here on GitHub would be nice!

Set-up to reproduce
Generate a program with the makecode editor using bluetooth blocks:

Use "no pairing required" in the project setup:

You need to remove the Bluetooth-IO-Pin-Dienst to make the other things working.

Now, use some software (e.g. Linux blueZ over bluetoothctl or an app like Nordic Semiconductor's nRF Connect to analyze the Calliope's bluetooth services.

[joernalraun]

Hi Markus,
if you have MakeCode (or Open Roberta) running on your own system you can use the updated Version of the DAL: https://github.com/calliope-mini/microbit-dal/tree/merge-upstream
I think that those issues should be fixed.
This one will be the new master in a short while and than it should be distributed via the editors directly.
Best
Joern

[MarkusPiotrowski]

@joernalraun Thank you! I'll try to set-up a local version of MakeCode and test the updated version of the DAL Sorry, without having a step-by-step description, setting up a local version seems rather complicated. So I'll wait for in a short while ...

[MarkusPiotrowski]

I have recognized that merge-upstream was merged into the main branch approx. 1 month ago. What are the next steps to make this part of the firmware and/or include the changes to the editors?

[woernerth]

Any news regarding the ble-accelerometer issue?

[joernalraun]

Any news regarding the ble-accelerometer issue?

Yes, indeed! If you try the new Open-Roberta or the current MakeCode beta (MakeCode.calliope.cc/beta) you will have the latest version!

[woernerth]

Almost everything is working fine. Thank you for the ...beta link.

I think there is a problem running the temperature and accelerometer service at the same time. I can't recieve temperature events in my application if the accelerometer service is running in parallel.