MQTT is a publish and subscribe messaging protocol based on TCP/IP . It is lightweight, simple, open and easy to implement. It is actually a message broker. The device publishes a topic and subscribes
[i=s]This post was last edited by roc2 on 2019-10-6 17:10[/i]The first line of JAVA code is
System.out.println("Hello, World!");PHP is
echo "Hello world";And Python is
print ("Hello, World")1. Tool ma
[size=4] By setting three baud rate related registers, namely the baud rate integer UxBR1, UxBR0, and the baud rate trim register UxMCTL, the baud rate control parameters are calculated using the foll
Analysis of the principle of power switching circuit:
1 input power is 12V power adapter
2-way input power supply is 12V lithium battery
Requirements: The power adapter is the main power source, and t