Bridging Mosquitto MQTT to io.adafruit.com MQTT

Adafruit have recently enabled MQTT as a transport for feeds on io.adafruit.com.

If you already have a MQTT broker configured and working you probably don't want to reconfigure your clients to publish to io.adafruit. Additionally the feeds only permit one topic level, so your carefully crafted hierarchy of topics would have to be reworked as well.

Another option is to bridge your local MQTT broker to adafruit.io and select which topics you want to publish there.

Here's an example dashboard that uses data from my bridged MQTT broker to display the temperatures in and around my beer fermenting fridge.

See the gist below for all the details.