Connect and Publish Data to Google Cloud IOT Core using SIM800 MQTT TCP


Hello Sir!
I have followed your tutorial “MQTT Protocol tutorial using SIM900/SIM800 modules - MQTT over TCP” and it is working perfectly fine with my STM32L47RG board and SIM800. Can you please guide me about procedure to connect to google cloud iot core. What changes are to be done with my existing code of CloudMQTT.
Thanks in advance:)