micro:bit UART bluetooth extension

[Laurent T]

i all,

I have trouble trying to use the app inventor microbit extension.

In fact I can send data through UART on BLE but I have never managed to receive data on the smartphone. 

Here are the codes

And the microbit program:

On that example, I choose to trigger the UART data sending "on shake" but I got the same result with other wayas of triggering (on button pressed, ....)

Thanks a lot for your help

[Evan Patton]

Hi Laurent,

It looks like you are not calling the Microbit_Uart1.RequestTXCharacteristic. You will want to call it in your BluetoothLE1.Connected event handler, otherwise the device won't know to listen for messages sent from the micro:bit.

Cheers,

Evan

[Laurent T]

Right you are.

Thanks for your input !

I updated my program (see below ) with the call you suggested. 

But it still does not work.

Here is the new code.

Have a nice week end

[Evan Patton]

Interesting. Everything looks like it should be working based on the blocks. I will test this out and get back to you.

Evan

[Laurent T]

Hi Evan,

I am going to turn into a pessimistic guy.

The micro:bit gets all information from the smartphone (app inventor) but the smartphone gets nothing from the device. 

Whether I  try to send strings, values, or bytes, nothing is received by the smartphone

Are you sure that the (app inventor)  functions related to the micro:bit extension work fine ? 

I am stuck . I have just bought a new microbits in case but I cannot believe that it will make some difference

Please find attached the last "blocks"

Laurent

[Evan Patton]

Hi Laurent,

We'll have a look at this and try to understand what is going on. We are in the process of writing some new tutorials for BBC micro:bit, including the UART, and I hope that we can get this figured out for you soon.

Regards,

Evan

[Farzeen Harunani]

Hey Laurent, 

We're doing some testing right now, so any information you can pass along about what does/doesn't work in your experience is appreciated. Also, you're definitely using the latest versions of the extensions? Do other micro:bit functions work? 

Thanks,

Farzeen

[Laurent T]

Hi Farzeen and Mark,

In reply to your messages, it still does not work  properly. The micro:bit gets all information from the smartphone (app inventor) but the smartphone gets nothing from the device. 

Whether I  try to send strings, values, bytes, nothing is received by the smartphone

Are you sure that the (app inventor) reception related  functions work properly ? Please find attached the last "blocks" I built (use of microbits UART service) 

I have also tested the temperature service that works wonders. These are only services I have implemented

fyi, I have just bought a new microbits in case but I cannot believe that it will make some difference

Thanks again for your effort. I really do appreciate

Laurent

[Evan Patton]

Hi Laurent,

We think we have a working demo that we will need to test further tomorrow. If that works as expected, we will share that with you. Longer term we are going to work on a redesign of the I/O pin component so that it is an abstraction beyond exposing the raw BLE characteristics.

Regards,

Evan