My app with ble don't send data

MIT App Inventor Help
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#1

I'm trying to make a app to connect with Bluetooth Low Energy to a esp32, but, when he should send a data to esp32 the app close. I'm using the extension BluetoothLE

led
led823×421 63.9 KB

#2

Can you please post aia

#3

Posted
led.aia (427.2 KB)

#4

Are you sending data to an Arduino? What kind?(uno, mega, micro)

#5

Try this code:

In your block BluetoothLE2.Connected, delete StartScanning.

Change UUID char with https://www.uuidgenerator.net/

Here more examples:

#6

I'm sending to an Esp32

#7

The StartScanning should be a StopScanning. I has change it, the UUIDs and use your exemples but the app yet is closing when I try to send some data to the ESP32

#8

Try this example: 2.- App send text to ESP32. Show on the Serial Monitor.

#9

It is work. I was using a rxuuid and a tx uuid, but a just need one. But now he just send the first value and dont send nothing more.

#10

He is working. The final code is here.

blocks
blocks1722×774 99.1 KB

#11

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