Can't use MQTT on Raspberry Pico W

[utdrmac]

The problem

$ esphome run garage.yaml --device /dev/tty.usbmodem144101
INFO Reading configuration garage.yaml...
Failed config

mqtt: [source garage.yaml:12]

  This feature is only available on ['esp32', 'esp8266'].
  broker: 10.10.10.10
  port: 1883

Which version of ESPHome has the issue?

2022.11.5

What type of installation are you using?

pip

Which version of Home Assistant has the issue?

N/A

What platform are you using?

RP2040

Board

Raspberry Pi Pico W

Component causing the issue

mqtt

Example YAML snippet

---
esphome:
  name: garage-pico

rp2040:
  board: rpipicow

  framework:
    platform_version: https://github.com/maxgerhardt/platform-raspberrypi.git

mqtt:
  broker: 10.10.10.203
  port: 1883

output:
  - platform: gpio
    pin:
      number: 32  # 25 for Pico (non-W)
      mode: output
    id: LED

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
  fast_connect: true

### Anything in the logs that might be useful for us?

_No response_

### Additional information

_No response_

[mirobiro]

I've asked around about this. Seemingly it's simply unsupported and won't be until somebody with the requisite skills decides to implement this. I can't fathom why it was considered worth doing for ESP8266 and ESP32 but not the Pico W, seems bizarre.

[skilau]

I have added support for it, and have issued a pull request for it here:
esphome/esphome#5305