1. Download
Official website download: free download and try EMQ products (emqx.com)
Select Windows as the system, and choose the latest version for the version
2. Create and subscribe to the server
Run MQTTX to create a server
Click the + button marked below to create a routine. In the new workspace, set the name of the MQTT subscriber and it will be ok. Everything else will be defaulted.
3. Complete server port subscription and information sending and receiving
Create two server routines as above (the names I created are esp8266 and esp32, which are called No. 1 and No. 2 below)
port subscription
Add the subscription port to the subscriber terminal 1 (I added a port named esp8266/message here, referred to as port 1 below)
send information
Specify port 1 in the subscriber terminal 2 to send the corresponding command (here I send JSON data of lon to port 1)
4. Inspection
sender:
Receiving end:
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