This project is modified from https://github.com/tuanpmt/esp_mqtt Made just few modification to fit DESN (test version) requirements.

The MQTT broker is user.jdaiot.com

Topic MUST be in this form /DESN/886/00/#

Global format /DESN/(country code)/(state code)/(city code)/(device id)/(application name)

For example, /DESN/886/00/06/g500001/pm2.5 /DESN/886/00/p000001/pm2.5