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Description
Using circuitpython 9.2.4 on an M5stack Atom S3 lite.
installed libs:
- neopixel
- adafruit_requests
- adafruit_connection_manager
- bluepad32
- adafruit_esp32spi
- adafruit_bus_device
- adafruit_ble
I'm trying to connect to Lego WEDO brick to send commands (haven't got there yet).
Also first version of code (with a more generalized approach: start_scan(Advertisement)) worked for scanning, but returned too little information - no device names (usually use it to find the device to connect).
Current (problematic) code is as follows:
import time
import board
from digitalio import DigitalInOut, Direction, Pull
import neopixel
from adafruit_ble import BLERadio
from adafruit_ble.advertising.standard import ProvideServicesAdvertisement
from adafruit_ble.uuid import UUID, VendorUUID
# Init button
btn = DigitalInOut(board.BTN)
btn.direction = Direction.INPUT
btn.pull = Pull.UP
# Init LED
led = neopixel.NeoPixel(board.NEOPIXEL, 1)
led.brightness = 0.1
values = (
(255, 0, 0),
(128, 128, 0),
(0, 255, 0), # Green
(0, 128, 128), # cyan
(0, 0, 255), # Blue
(128, 0, 128), # Purple
)
INDEX = 0
# Init BLE
# Adapter = Adapter()
#_bleio.start_scan(extended=True, timeout=10, interval=1.2)
found = set()
scan_responses = set()
ble = BLERadio()
connection = None
print("scanning")
led[0] = (0,128,128)
WEDO_SERVICE_ID = VendorUUID('00001523-1212-efde-1523-785feabcd123')
WEDO_SERVICE = None
for advertisement in ble.start_scan(ProvideServicesAdvertisement):
if advertisement.services:
if WEDO_SERVICE_ID in advertisement.services:
WEDO_SERVICE = list(advertisement.services)[0]
led[0] = (0, 255, 0)
ble.stop_scan()
connection = ble.connect(advertisement.address)
connection.connection_interval = 11.5
break
#t: UUID('00001523-1212-efde-1523-785feabcd123')> >
if connection:
print(dir(connection))
#connection.pair() ## <-- Wedo doesn't seem to pair (it just hangs here indefinetely)
print(connection.paired)
# print('Service:', connection[WEDO_SERVICE]) ## <-- Uncommenting this line causes crash
# print('Service:', connection[WEDO_SERVICE_ID]) ## <-- This one also crashes
print('Con:\t\t', connection)
print('List:\t\t', list(connection)) ## <-- This one returns AttributeError: 'int' object has no attribute 'bleio_uuid'
print('Con dict: \t', connection.__dict__)
#print('Con _dr: \t', connection._discover_remote(connection)) ## also crash
#print('Con drs: \t', connection._bleio_connection.discover_remote_services()) ## and here too.
while True:
if not btn.value:
INDEX = 0 if INDEX > 4 else INDEX+1
else:
pass
time.sleep(0.1) # sleep for debounce
led[0] = values[INDEX] # Red
time.sleep(0.5)The result in serial is:
Con: <BLEConnection object at 0x3fcdca20>
Con dict: {'_constructed_services': {}, '_bleio_connection': <Connection>, '_discovered_bleio_services': {}}
Traceback (most recent call last):
---- Closed serial port COM16 due to disconnection from the machine ----
---- Reopened serial port COM16 ----
Auto-reload is off.
Running in safe mode! Not running saved code.
You are in safe mode because:
CircuitPython core code crashed hard. Whoops!
Hard fault: memory access or instruction error.
Cant even figure out where traceback tried to point.
Started to rework BLE part to pure _bleio, but I start suspecting that won't help.