connect() fails with esp32spi (pyportal): TypeError: unsupported types for __add__: 'int', 'NoneType'

[baldengineer]

Using the example minimqtt_adafruitio_esp32spi.py on a PyPortal.

Other ESP / Wi-Fi operations work fine. This issue isn't limited to just this example. However, it is the easiest method to demonstrate the error.

settings.toml contains entries for:

CIRCUITPY_WIFI_SSID
CIRCUITPY_WIFI_PASSWORD
aio_username
aio_key

Version specifics:

Adafruit CircuitPython 9.2.1 on 2024-11-20; Adafruit PyPortal with samd51j20
nina/esp Firmware vers. 1.7.7

adafruit_connection_manager==3.1.2
adafruit_requests==4.1.8
adafruit_ticks==1.1.1
adafruit_esp32spi==8.4.2
adafruit_io==5.10.1
adafruit_portalbase==2.1.2
adafruit_pyportal==6.3.6
adafruit_register==1.10.1
adafruit_minimqtt==7.11.0

When attempting to connect to an MQTT broker, this error occurs:

Traceback (most recent call last):
  File "code.py", line 103, in <module>
  File "adafruit_minimqtt/adafruit_minimqtt.py", line 430, in connect
  File "adafruit_minimqtt/adafruit_minimqtt.py", line 554, in _connect
  File "adafruit_minimqtt/adafruit_minimqtt.py", line 476, in _send_bytes
TypeError: unsupported types for __add__: 'int', 'NoneType'

Line 103 of minimqtt_adafruitio_esp32spi.py is mqtt_client.connect()

[dhalbert]

#231 assumed that Socket.send() returns an integer. Seems like the ESP32SPI code is not doing that.