Android Question Adafruit Feather M0

[fishwolf]

I have a Adafruit Feather M0 with a simple chat application, send and receive text with UART.

with test app of Adafruit work fine.

I'm trying to connect to device with b4a and this example, but not work.

find the devide, but not connect.

java.io.IOException: read failed, socket might closed or timeout, read ret: -1

it's the correct way/example?

thanks

 

[Erel]

No. You shouldn't use prefix mode unless both sides of the connection implement the protocol.

Why isn't your code based on the latest example: https://www.b4x.com/android/forum/threads/android-bluetooth-bluetoothadmin-tutorial.14768/#content

 

[fishwolf]

No. You shouldn't use prefix mode unless both sides of the connection implement the protocol.

Why isn't your code based on the latest example: https://www.b4x.com/android/forum/threads/android-bluetooth-bluetoothadmin-tutorial.14768/#content

with the lastest example i have the same error on connection

java.io.IOException: read failed, socket might closed or timeout, read ret: -1

 

[Erel]

It probably listens on a non-standard address. Serial.Connect tries to connect to "00001101-0000-1000-8000-00805F9B34FB"

 

[fishwolf]

i see the same address with app that work fine and with B4X app

 

[Erel]

Please edit the your posts and upload small images.

 

[fishwolf]

Please edit the your posts and upload small images.

done

 

[Erel]

This is a BLE device. Not classic Bluetooth. Try the BLE example.

 

[fishwolf]

Ok, with this example i can connect to adafruit and read data.

but how can i read the uart data?

i have a Adafruit that send "123" each a seconds

https://learn.adafruit.com/introducing-adafruit-ble-bluetooth-low-energy-friend/uart-service

DataAvailable
Service=6e400001-b5a3-f393-e0a9-e50e24dcca9e
Characteristics=(MyMap) {6e400003-b5a3-f393-e0a9-e50e24dcca9e=[B@1f63311, 6e400002-b5a3-f393-e0a9-e50e24dcca9e=[B@9891c76}
Service UART
char: 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value = 
char: 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value = [B@1f63311
char: 6e400002-b5a3-f393-e0a9-e50e24dcca9e, value = 
char: 6e400002-b5a3-f393-e0a9-e50e24dcca9e, value = [B@9891c76

 

[Erel]

You should start a new thread for a new question. Make sure to go over the BLE tutorial.