Send data Lopy to LoPy via BLE



  • Re: Send data WiPy to LoPy via BLE

    I try found out how to send data between the devices...
    this is the code I have now:

    #from network import LoRa
    from network import Bluetooth
    
    import machine
    import socket
    import pycom
    import binascii
    import network
    from network import WLAN
    from machine import RTC
    
    bluetooth = Bluetooth()
    bluetooth.set_advertisement(name="stefan", manufacturer_data="lopy_v1")
    bluetooth.start_scan(-1) #Change to 10 to have it searching for 10 sec instead if forever
    
    adv = None
    
    while True:
        adv = bluetooth.get_adv()
        if adv and bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_NAME_CMPL) == 'LoPy':
    
            try:
                bluetooth.connect(adv.mac)
    
                print(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_APPEARANCE))
                print("Connected to device with addr = {}".format(binascii.hexlify(adv.mac)))
    
                #bluetooth.connect(adv.mac)
                pycom.heartbeat(False)
                for cycles in range(1): # stop after 1 cycles
                    pycom.rgbled(0x000080) # blue
                    time.sleep(0.5)
                    pycom.rgbled(0x000000) # blue
                    time.sleep(0.5)
                    pycom.rgbled(0x000080) # blue
                    time.sleep(0.5)
                    pycom.rgbled(0x000000) # blue
    
                print(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_APPEARANCE))
    
            except:
                #start scanning again
                bluetooth.start_scan(5)
    
                continue
            break
        else:
            if adv != None:
                print('Hej')
    
    def conn_cb (bt_o):
            events = bt_o.events()
            if  events & Bluetooth.CLIENT_CONNECTED:
                print("Client connected")
            elif events & Bluetooth.CLIENT_DISCONNECTED:
                print("Client disconnected")
    
            bluetooth.callback(trigger=Bluetooth.CLIENT_CONNECTED | Bluetooth.CLIENT_DISCONNECTED, handler=conn_cb)
    
            bluetooth.advertise(True)
    
            srv1 = bluetooth.service(uuid=b'1234567890123456', isprimary=True)
    
            chr1 = srv1.characteristic(uuid=b'ab34567890123456', value=5)
    
            char1_read_counter = 0
            def char1_cb_handler(chr):
                global char1_read_counter
                char1_read_counter += 1
                events = chr.events()
                if  events & Bluetooth.CHAR_WRITE_EVENT:
                    print("Write request with value = {}".format(chr.value()))
                    print('1')
                else:
                    if char1_read_counter < 3:
                        print('Read request on char 1')
                        print('2')
                    else:
                        return 'ABC DEF'
                        print('3')
    
            char1_cb = chr1.callback(trigger=Bluetooth.CHAR_WRITE_EVENT | Bluetooth.CHAR_READ_EVENT, handler=char1_cb_handler)
    
            srv2 = bluetooth.service(uuid=1234, isprimary=True)
    
            chr2 = srv2.characteristic(uuid=4567, value=0x1234)
            char2_read_counter = 0xF0
            def char2_cb_handler(chr):
                global char2_read_counter
                char2_read_counter += 1
                if char2_read_counter > 0xF1:
                    return char2_read_counter
    
            char2_cb = chr2.callback(trigger=Bluetooth.CHAR_READ_EVENT, handler=char2_cb_handler)
            print('4')
    

    I was thinking if it had do to with this one:

    characteristic.read()
    characteristic.write(value)

    https://docs.pycom.io/chapter/firmwareapi/pycom/network/bluetooth/gattccharacteristic.html



  • @stefan85e Looks like @seb made the edit for you in the meantime.



  • @jcaron what do you mean!?



  • @stefan85e Please edit your post and add ``` on separate lines before and after your code so it is properly formatted.

    Thanks!



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