Noob question: how to send data through bluetooth
Hi everyone, I would like to transmit light intensity measurement through bluetooth but I cannot understand how to do this since I'm a pycom noob and it is not very clear to me the mechanism, I think I lack some basics concepts.
After some attemps I was able to connect to my phone and discover my Fipy using BLE Scanner app but I don't know how to continue.
This is my code at the moment
from network import Bluetooth import ubinascii import time import pycom from pycoproc_2 import Pycoproc import machine from LTR329ALS01 import LTR329ALS01 pycom.heartbeat(False) pycom.rgbled(0x0A0A08) # white py = Pycoproc() pybytes_enabled = False if 'pybytes' in globals(): if(pybytes.isconnected()): print('Pybytes is connected, sending signals to Pybytes') pybytes_enabled = True lt = LTR329ALS01(py) bt = Bluetooth() bt.set_advertisement(name='FraccaPy', service_uuid=b'1234567890123456') bt.advertise(True) if not bt.isscanning(): bt.start_scan(-1) # start scanning with no timeout print('Trying to establish connection with Nord') connection = bt.connect('ac5fea133f19') if (connection.isconnected()): print ('Successfully connected to Nord') # while True: # time.sleep(1) # # print read data on screen # print("Light [channel Blue lux, channel Red lux]: " + str(lt.light())) # # switch on led graduated in relation to external light # red = lt.light()*0.5 # blue = lt.light()*0.5 # led = round (red + blue) # pycom.rgbled(led << 8) # # transmit data via Wi-Fi # if(pybytes_enabled): # pybytes.send_signal(1, lt.light())
Any help would be greatly appreciated, thanks in advance.
@Gijs actually I solved my problem before seeing this , anyway it is very interesting.
In particular, my problem was solved by removing
if not bt.isscanning(): bt.start_scan(-1) # start scanning with no timeout print('Trying to establish connection with Nord') connection = bt.connect('ac5fea133f19')
I found out these commands were not needed and they broke my code.
We recently provided an example for this here: https://docs.pycom.io/tutorials/networks/ble/callback/
Let me know if that works for you