bluetooth on data received

[Svein-Tore]

Hi

I see it is possible to send a value to themicrobit with the command

ubit.text

I just wonder, if I add a bluetooth on data reeceived command in makecode, will it be possible to get that value on the microbit as variable?

[ukBaz]

The short answer is no. ubit.text command is writing to the LED SERVICE - LED Text characteristic where as the on data reeceived command in makecode is working on the UART SERVICE - TX Characteristic. More details in:

https://lancaster-university.github.io/microbit-docs/resources/bluetooth/bluetooth_profile.html

The ubit.uart command is probably what you are looking for. There is an example of its use in: https://github.com/ukBaz/python-bluezero/blob/main/examples/microbit_uart.py

If you don't want to receive messages from the UART then you do not need to do the ubit.run_async() functionality. So the https://github.com/ukBaz/python-bluezero/blob/main/examples/microbit_poll.py might be the better example with ubit.text replaced with ubit.uart.

Let me know if I've not explained that very well.

[Svein-Tore]

Hi Barry!

I've been on your workshop (https://ukbaz.github.io/howto/ubit_workshop.html) and there I found this program:

rom bluezero import microbit ubit = microbit.Microbit(adapter_addr='xx:xx:xx:xx:xx:xx', device_addr='yy:yy:yy:yy:yy:yy') my_text = 'Hello, world' ubit.connect() while my_text is not '': ubit.text = my_text my_text = input('Enter message: ')

ubit.disconnect()

You wrote in your email that

So the https://github.com/ukBaz/python-bluezero/blob/main/examples/microbit_poll.py might be the better example with ubit.text replaced with ubit.uart. So I wonder, If I change the line

ubit.text=my_text

in the program above with ubit.uart

Will it work (be able to get my_text in bluetooth on data received)?

Best wishes, Svein-Tore

fre. 4. mar. 2022 kl. 13:00 skrev Barry Byford @.***>:

The short answer is no. ubit.text command is writing to the LED SERVICE - LED Text characteristic where as the on data reeceived command in makecode is working on the UART SERVICE - TX Characteristic. More details in:

https://lancaster-university.github.io/microbit-docs/resources/bluetooth/bluetooth_profile.html

The ubit.uart command is probably what you are looking for. There is an example of its use in:

https://github.com/ukBaz/python-bluezero/blob/main/examples/microbit_uart.py

If you don't want to receive messages from the UART then you do not need to do the ubit.run_async() functionality. So the https://github.com/ukBaz/python-bluezero/blob/main/examples/microbit_poll.py might be the better example with ubit.text replaced with ubit.uart.

Let me know if I've not explained that very well.

— Reply to this email directly, view it on GitHub https://github.com/ukBaz/python-bluezero/issues/363#issuecomment-1059101072, or unsubscribe https://github.com/notifications/unsubscribe-auth/AD563NQQWW6PRS5TFJTGNBLU6H3OBANCNFSM5P5BKO4A . Triage notifications on the go with GitHub Mobile for iOS https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675 or Android https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub.

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[Svein-Tore]

Hi Barry!

After doing some testing I got it work!

Best wishes, Sve\in-Tore

lør. 5. mar. 2022 kl. 13:32 skrev Svein-Tore Narvestad @.***>:

Hi Barry!

I've been on your workshop ( https://ukbaz.github.io/howto/ubit_workshop.html) and there I found this program:

rom bluezero import microbit ubit = microbit.Microbit(adapter_addr='xx:xx:xx:xx:xx:xx', device_addr='yy:yy:yy:yy:yy:yy') my_text = 'Hello, world' ubit.connect() while my_text is not '': ubit.text = my_text my_text = input('Enter message: ')

ubit.disconnect()

You wrote in your email that

So the https://github.com/ukBaz/python-bluezero/blob/main/examples/microbit_poll.py might be the better example with ubit.text replaced with ubit.uart. So I wonder, If I change the line

ubit.text=my_text

in the program above with ubit.uart

Will it work (be able to get my_text in bluetooth on data received)?

Best wishes, Svein-Tore

fre. 4. mar. 2022 kl. 13:00 skrev Barry Byford @.***>:

The short answer is no. ubit.text command is writing to the LED SERVICE

• LED Text characteristic where as the on data reeceived command in makecode is working on the UART SERVICE - TX Characteristic. More details in:

https://lancaster-university.github.io/microbit-docs/resources/bluetooth/bluetooth_profile.html

The ubit.uart command is probably what you are looking for. There is an example of its use in:

https://github.com/ukBaz/python-bluezero/blob/main/examples/microbit_uart.py

If you don't want to receive messages from the UART then you do not need to do the ubit.run_async() functionality. So the https://github.com/ukBaz/python-bluezero/blob/main/examples/microbit_poll.py might be the better example with ubit.text replaced with ubit.uart.

Let me know if I've not explained that very well.

— Reply to this email directly, view it on GitHub https://github.com/ukBaz/python-bluezero/issues/363#issuecomment-1059101072, or unsubscribe https://github.com/notifications/unsubscribe-auth/AD563NQQWW6PRS5TFJTGNBLU6H3OBANCNFSM5P5BKO4A . Triage notifications on the go with GitHub Mobile for iOS https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675 or Android https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub.

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[ukBaz]

Well done on getting it working. Sounds like this issue is resolved so I'll go ahead and close it. Please re-open if it is not resolved.

[Svein-Tore]

Thanks!

søn. 6. mar. 2022, 07:27 skrev Barry Byford @.***>:

Well done on getting it working. Sounds like this issue is resolved so I'll go ahead and close it. Please re-open if it is not resolved.

— Reply to this email directly, view it on GitHub https://github.com/ukBaz/python-bluezero/issues/363#issuecomment-1059904232, or unsubscribe https://github.com/notifications/unsubscribe-auth/AD563NXWOCR4OESTWGBU6M3U6RF6LANCNFSM5P5BKO4A . Triage notifications on the go with GitHub Mobile for iOS https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675 or Android https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub.

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[Svein-Tore]

HI Barry!

Si I went into trouble. I now get the following error:

@.***:~/.local/bin $ python3 testing_Micorbit.py Traceback (most recent call last): File "/home/pi/.local/bin/testing_Micorbit.py", line 5, in ubit.connect() File "/usr/local/lib/python3.9/dist-packages/bluezero/microbit.py", line 192, in connect self.ubit.connect() File "/usr/local/lib/python3.9/dist-packages/bluezero/central.py", line 89, in connect self.rmt_device.connect(timeout=timeout) File "/usr/local/lib/python3.9/dist-packages/bluezero/device.py", line 306, in connect raise dbus_exception File "/usr/local/lib/python3.9/dist-packages/bluezero/device.py", line 290, in connect self.bus.call_blocking(constants.BLUEZ_SERVICE_NAME, File "/usr/lib/python3/dist-packages/dbus/connection.py", line 652, in call_blocking reply_message = self.send_message_with_reply_and_block( dbus.exceptions.DBusException: org.bluez.Error.Failed: Software caused connection abort

Any suggestion?

søn. 6. mar. 2022 kl. 09:03 skrev Svein-Tore Narvestad @.***>:

Thanks!

søn. 6. mar. 2022, 07:27 skrev Barry Byford @.***>:

Well done on getting it working. Sounds like this issue is resolved so I'll go ahead and close it. Please re-open if it is not resolved.

— Reply to this email directly, view it on GitHub https://github.com/ukBaz/python-bluezero/issues/363#issuecomment-1059904232, or unsubscribe https://github.com/notifications/unsubscribe-auth/AD563NXWOCR4OESTWGBU6M3U6RF6LANCNFSM5P5BKO4A . Triage notifications on the go with GitHub Mobile for iOS https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675 or Android https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub.

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[ukBaz]

There are not too many clues in that error message. It appears to be having an issue connecting. What did you change before it stopped working? Did you change the code on the micro:bit? Do you need to delete the pairing information and re-pair the two devices? Have you tried restarting the BlueZ daemon on the Linux machine (sudo service bluetooth restart)?

To get Bluetooth debug information on Linux:

• Are you able to connect to the device using bluetoothctl?
• Does service bluetooth status show errors?

When running your script have separate terminals open with the following running to get more debug information:

• bluetoothctl
• journalctl -f -u bluetooth
• sudo busctl monitor org.bluez
• sudo btmon

[Svein-Tore]

Hi Barry!

Something went wrong with the pairing I guess!

Worked after pairing the microbit with the Rpi!

Svein-Tore

ons. 9. mar. 2022 kl. 09:00 skrev Barry Byford @.***>:

There are not too many clues in that error message. It appears to be having an issue connecting. What did you change before it stopped working? Did you change the code on the micro:bit? Do you need to delete the pairing information and re-pair the two devices? Have you tried restarting the BlueZ daemon on the Linux machine (sudo service bluetooth restart)?

To get Bluetooth debug information on Linux:

• Are you able to connect to the device using bluetoothctl?
• Does service bluetooth status show errors?

When running your script have separate terminals open with the following running to get more debug information:

• bluetoothctl
• journalctl -f -u bluetooth
• sudo busctl monitor org.bluez
• sudo btmon

— Reply to this email directly, view it on GitHub https://github.com/ukBaz/python-bluezero/issues/363#issuecomment-1062649381, or unsubscribe https://github.com/notifications/unsubscribe-auth/AD563NWYRZKQAA5ZRPNIBH3U7BLB5ANCNFSM5P5BKO4A . Triage notifications on the go with GitHub Mobile for iOS https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675 or Android https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub.

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