Hello, I'm a high school student and I need to create app to message to node32-s by blt.
Code is all right but I don't know how should I do in mit app
Tutorials for ESP32 bluetooth.
Good advice for handling bluetooth transmission (from ABG):
Be sure to use println() at the end of each message to send from the sending device, to signal end of message.
Only use print() in the middle of a message.
Be sure not to println() in the middle of a message, or you will break it into two short messages and mess up the item count after you split the message in AI2.
Do not rely on timing for this, which is unreliable.
In the AI2 Designer, set the Delimiter attribute of the BlueTooth Client component to 10 to recognize the End of Line character.
Also, return data is not immediately available after sending a request,
you have to start a Clock Timer repeating and watch for its arrival in the Clock Timer event. The repeat rate of the Clock Timer should be faster than the transmission rate in the sending device, to not flood the AI2 buffers.
In your Clock Timer, you should check
Is the BlueTooth Client still Connected?
Is Bytes Available > 0?
IF Bytes Available > 0 THEN
set message var to BT.ReceiveText(-1)
This takes advantage of a special case in the ReceiveText block:
ReceiveText(numberOfBytes)
Receive text from the connected Bluetooth device. If numberOfBytes is less than 0, read until a delimiter byte value is received.
sorry I guess I don't make myself clear
this is my code in arduino IDE
i also can connect node32-s with mit app by blt
but i don't know how to message
Check the link in the original post, that has some good examples that should help you achieve communication between your app and the blt module.
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