mqttsub

Documentation

Overview

This is a sensor station that uses a RTL8720DN running on the device UART2. It creates an MQTT connection that publishes a message every second to an MQTT broker.

In other words: Your computer <--> USB-CDC <--> MCU <--> UART2 <--> RTL8720DN <--> Internet <--> MQTT broker.

You must also install the Paho MQTT package to build this program:

go get -u github.com/eclipse/paho.mqtt.golang

You can check that mqttpub/mqttsub is running successfully with the following command.

mosquitto_sub -h test.mosquitto.org -t tinygo/tx
mosquitto_pub -h test.mosquitto.org -t tinygo/rx -m "hello world"