BLE communication

Python
1

I have micropython code on my DIGI radio that accepts a bluetooth connection and can receive data from the connected device. My issue is that I do not know how to reply to the connected device. I would like to just echo the incoming message but I cannot find anything in the docs to accomplish this. I have the following:

try:
                        relay.send(INTERFACES[1], payload)
                    except Exception as ex:
                        util.debug_print('[SENDING MESSAGE BACK ON BT RELAY EXCEPTION] - '.format(ex))

Where interfaces [1] is bluetooth and the payload is a string representation of byte array. It hits the exception but it is empty which is also confusing. If anyone has any examples or can point to a resource it would be much appreciated

2

All available samples can be found at xbee-micropython/samples/bluetooth at master · digidotcom/xbee-micropython · GitHub
and

as well as in the PyCharm plugin.

3

Here is some additional data.

  • Import the digi.ble Module: First, ensure that you import the digi.ble module in your MicroPython script.
from digi import ble
  • Enable BLE: Make sure that the BLE functionality is active.
ble.active(True)

Create a BLE Advertisement: You can create custom BLE advertisements using the gap_advertise() method.

ble.gap_advertise(interval=100, adv_data=b'Your Data Here')
    • interval specifies the advertising interval in milliseconds.
  • adv_data is the data you want to send.
  • Connect and Send Data: If you need to establish a connection and send data, you can use the gap_connect() method to connect to a BLE device and then use GATT services to send data.
connection = ble.gap_connect(address='XX:XX:XX:XX:XX:XX')
connection.gatt_write_handle(handle, data)
    • Replace 'XX:XX:XX:XX:XX:XX' with the address of the BLE device you want to connect to.
  • Use gatt_write_handle() to write data to a specific GATT handle.
  • Disconnect: After sending the data, you can disconnect if needed.
connection.disconnect()

For more advanced use cases, such as creating custom advertisements or handling specific GATT services, refer to the Digi MicroPython Programming Guide and explore the digi.ble module’s capabilities.

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4

BLE (Bluetooth Low Energy) communication enables short-range wireless data exchange with low power consumption. It is commonly used in IoT devices, wearables, and health monitors.
BLE