Cannot use PMS5003 with Airlift Featherwing for Adafruit IO

[wildestpixel]

On M4 feather Express, I get a REPL output of

code.py output:
Traceback (most recent call last):
File "code.py", line 34, in <module>
ValueError: D11 in use

My Circuitpython Code is :

# Example of using the Adafruit IO CircuitPython MQTT client
# to subscribe to an Adafruit IO feed and publish random data
# to be received by the feed.
#
# Example by Tony DiCola for Adafruit Industries
# Modified by Brent Rubell for Adafruit Industries, 2019
import time
from random import randint

from pimoroni_pms5003 import PMS5003

import board
import busio
from digitalio import DigitalInOut
from adafruit_esp32spi import adafruit_esp32spi
from adafruit_esp32spi import adafruit_esp32spi_wifimanager
import adafruit_esp32spi.adafruit_esp32spi_socket as socket
import neopixel
from adafruit_io.adafruit_io import IO_MQTT
import adafruit_minimqtt as MQTT

pms5003 = PMS5003()
### WiFi ###

# Get wifi details and more from a secrets.py file
try:
    from secrets import secrets
except ImportError:
    print("WiFi secrets are kept in secrets.py, please add them there!")
    raise

# If you are using a board with pre-defined ESP32 Pins:
esp32_cs = DigitalInOut(board.D13)
esp32_ready = DigitalInOut(board.D11)
esp32_reset = DigitalInOut(board.D12)

# If you have an externally connected ESP32:
# esp32_cs = DigitalInOut(board.D9)
# esp32_ready = DigitalInOut(board.D10)
# esp32_reset = DigitalInOut(board.D5)

spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)
"""Use below for Most Boards"""
status_light = neopixel.NeoPixel(
    board.NEOPIXEL, 1, brightness=0.2
)  # Uncomment for Most Boards
"""Uncomment below for ItsyBitsy M4"""
# status_light = dotstar.DotStar(board.APA102_SCK, board.APA102_MOSI, 1, brightness=0.2)
# Uncomment below for an externally defined RGB LED
# import adafruit_rgbled
# from adafruit_esp32spi import PWMOut
# RED_LED = PWMOut.PWMOut(esp, 26)
# GREEN_LED = PWMOut.PWMOut(esp, 27)
# BLUE_LED = PWMOut.PWMOut(esp, 25)
# status_light = adafruit_rgbled.RGBLED(RED_LED, BLUE_LED, GREEN_LED)
wifi = adafruit_esp32spi_wifimanager.ESPSPI_WiFiManager(esp, secrets, status_light)

# Define callback functions which will be called when certain events happen.
# pylint: disable=unused-argument
def connected(client):
    # Connected function will be called when the client is connected to Adafruit IO.
    # This is a good place to subscribe to feed changes.  The client parameter
    # passed to this function is the Adafruit IO MQTT client so you can make
    # calls against it easily.
    print("Connected to Adafruit IO!  Listening for DemoFeed changes...")
    # Subscribe to changes on a feed named DemoFeed.
    client.subscribe("DemoFeed")

def subscribe(client, userdata, topic, granted_qos):
    # This method is called when the client subscribes to a new feed.
    print("Subscribed to {0} with QOS level {1}".format(topic, granted_qos))

def unsubscribe(client, userdata, topic, pid):
    # This method is called when the client unsubscribes from a feed.
    print("Unsubscribed from {0} with PID {1}".format(topic, pid))

# pylint: disable=unused-argument
def disconnected(client):
    # Disconnected function will be called when the client disconnects.
    print("Disconnected from Adafruit IO!")

# pylint: disable=unused-argument
def message(client, feed_id, payload):
    # Message function will be called when a subscribed feed has a new value.
    # The feed_id parameter identifies the feed, and the payload parameter has
    # the new value.
    print("Feed {0} received new value: {1}".format(feed_id, payload))

# Connect to WiFi
print("Connecting to WiFi...")
wifi.connect()
print("Connected!")

# Initialize MQTT interface with the esp interface
MQTT.set_socket(socket, esp)

# Initialize a new MQTT Client object
mqtt_client = MQTT.MQTT(
    broker="https://io.adafruit.com",
    username=secrets["aio_user"],
    password=secrets["aio_key"],
)

# Initialize an Adafruit IO MQTT Client
io = IO_MQTT(mqtt_client)

# Connect the callback methods defined above to Adafruit IO
io.on_connect = connected
io.on_disconnect = disconnected
io.on_subscribe = subscribe
io.on_unsubscribe = unsubscribe
io.on_message = message

# Connect to Adafruit IO
print("Connecting to Adafruit IO...")
io.connect()

# Below is an example of manually publishing a new  value to Adafruit IO.
last = 0
print("Publishing a new message every 10 seconds...")
while True:
    reading = pms5003.read()
    pm2 = reading.data[1]
    # Explicitly pump the message loop.
    io.loop()
    # Send a new message every 10 seconds.
    if (time.monotonic() - last) >= 10:
#        value = randint(0, 100)
        print("Publishing {0} to DemoFeed.".format(pm2))
        io.publish("DemoFeed", pm2)
        last = time.monotonic()

Code to read the PMS 2.5 data alone is fine, as is my script uploading to AdafruitIO, but the complaint is about pin D11, which is ESPBUSY or esp32_ready on the airlift.

[kevinjwalters]

I went through the code and documentation and made a list of the pins. D11 (pin23 in Pimoroni talk) is wired up to PMS5003 reset. That's physical so I don't think there's any way to change this other than to do something creative with the wiring. For a non-bus based approach there's always going to pin conflicts like this especially on boards like the Enviro+ which need a lot of connections.

[kevinjwalters]

I suspect this falls into the useful-to-know-but-can't-fix category.

I'll eventually test out something like the Unexpected Maker FeatherS2 which with ESP32-S2 can do Wi-Fi.

[kevinjwalters]

BTW, I've just discovered in the Raspberry Pi world there's this useful tool https://pinout.xyz/phatstack to show compatibility between devices based on pin use.