Description
Hi everyone,
This issue was originally posted on the Adafruit Forums: https://forums.adafruit.com/viewtopic.php?p=970491#p970491
I've been trying to use BLE with CircuitPython, and I've hit a snag with the PyPortal Titano. I have:
- Updated CircuitPython to version 8.0.5
- Upgraded the libraries on the device to those from the 8.x bundle
- Updated the Airlift firmware to NINA_W102-1.7.4 using Adafruit's guide
# SPDX-FileCopyrightText: 2020 Dan Halbert, written for Adafruit Industries
#
# SPDX-License-Identifier: Unlicense
# pylint: disable=unused-import
import board
import busio
from digitalio import DigitalInOut
from adafruit_ble import BLERadio
from adafruit_ble.advertising.standard import ProvideServicesAdvertisement
from adafruit_ble.services.nordic import UARTService
from adafruit_esp32spi import adafruit_esp32spi
from adafruit_airlift.esp32 import ESP32
# If you are using a Metro M4 Airlift Lite, PyPortal,
# or MatrixPortal, you can use the default pin settings.
# Leave this DEFAULT line uncommented.
# If you are using a board with pre-defined ESP32 Pins:
esp32 = ESP32()
# If you are using a Metro M7 **OR**
# if you are using CircuitPython 6.0.0 or earlier,
# on PyPortal and PyPortal Titano only, use the pin settings
# below. Comment out the DEFAULT line above and uncomment
# the line below. For CircuitPython 6.1.0, the pin names
# have changed for these boards, and the DEFAULT line
# above is correct.
# esp32 = ESP32(tx=board.TX, rx=board.RX)
# If you are using an AirLift FeatherWing or AirLift Bitsy Add-On,
# use the pin settings below. Comment out the DEFAULT line above
# and uncomment the lines below.
# If you are using an AirLift Breakout, check that these
# choices match the wiring to your microcontroller board,
# or change them as appropriate.
# esp32 = ESP32(
# reset=board.D12,
# gpio0=board.D10,
# busy=board.D11,
# chip_select=board.D13,
# tx=board.TX,
# rx=board.RX,
# )
# If you are using an AirLift Shield,
# use the pin settings below. Comment out the DEFAULT line above
# and uncomment the lines below.
# esp32 = ESP32(
# reset=board.D5,
# gpio0=board.D6,
# busy=board.D7,
# chip_select=board.D10,
# tx=board.TX,
# rx=board.RX,
# )
adapter = esp32.start_bluetooth()
ble = BLERadio(adapter)
uart = UARTService()
advertisement = ProvideServicesAdvertisement(uart)
while True:
ble.start_advertising(advertisement)
print("waiting to connect")
while not ble.connected:
pass
print("connected: trying to read input")
while ble.connected:
# Returns b'' if nothing was read.
one_byte = uart.read(1)
if one_byte:
print(one_byte)
uart.write(one_byte)
When I try to use this code
I get this error from Mu:
0;🐍main.py | 8.0.5\]0;🐍main.py | 8.0.5\Traceback (most recent call last):
File "main.py", line 64, in <module>
File "adafruit_ble/__init__.py", line 215, in start_advertising
ValueError: Data too large for advertisement packet
]0;🐍215@adafruit_ble/__init__.py ValueError | 8.0.5\
Code done running.I've also done all of this using a Feather M4 Express with the standalone Airlift breakout (ADA4201) and it works just fine, so this seems to be something specific to the Titano or built-in airlifts. The code also works fine when run on a Feather nRF52840 and a Seeed Xiao nRF52840.
Mikeysklar on the forum asked me to print advertisement after the code runs:
uart = UARTService()
advertisement = ProvideServicesAdvertisement(uart)On the Titano this gives:
<ProvideServicesAdvertisement flags=<AdvertisingFlags general_discovery le_only > services=<BoundServiceList: UUID('6e400001-b5a3-f393-e0a9-e50e24dcca9e')> >
On the Feather M4 Expre
4FAF
ss with Airlift breakout this gives:
<ProvideServicesAdvertisement services=<BoundServiceList: UUID('6e400001-b5a3-f393-e0a9-e50e24dcca9e')> flags=<AdvertisingFlags general_discovery le_only > >
The BLE code is a little beyond me, so I can't quite see what's going wrong here. Any help would be very much appreciated.