Hi,All! I wrote a small application on the basis of the library https://www.b4x.com/android/forum/threads/jg-mqtt-library.51842/#post-325524 It is made in the ESP8266 chip. The application can: -Transfer temperature DS18b20 chip -40 + 120C -On/Off relay 220V/5A -Read Sensor Alarm -Send and...
www.b4x.com
Hope for any help to build this project.
Best regards
Hi, you need to build 2 kinds of applications.
a. For the front-end application, use B4A.
b. build the hardware using esp8266/esp32.
There are examples available in the forum. You can try to look into this link.
In my case, I started exploring MQTT with the MQT chat tutorial.