link to tutorial

01 Professional Development.md

@@ -69,7 +69,7 @@ You will need to ensure your skills are up to date before we begin preparation i
 
 ### 7.2 API Team
 
-1. Subscribe to an MQTT data feed on [Adafruit](https://io.adafruit.com/) using NodeJS and print data to terminal
+1. Subscribe to an MQTT data feed on [Adafruit](https://io.adafruit.com/) using NodeJS and print data to terminal. There is a good [online tutorial](https://learn.adafruit.com/adafruit-io/mqtt-api) to get you started.
 2. Build an MQTT server
 
 ### 7.3 Front End