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Add .md to README and clarify what example does #712

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9 changes: 7 additions & 2 deletions pico_w/wifi/mqtt/README → pico_w/wifi/mqtt/README.md
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Expand Up @@ -34,8 +34,8 @@ When building the code set the host name of the MQTT server, e.g.
export MQTT_SERVER=myhost
cmake ..
```

The example should publish its core temperature to the /temperature topic. You can subscribe to this topic from another machine.
The example checks its core temperature every ten seconds and if it has changed, publishes it to the
/temperature topic. You can subscribe to this topic from another machine.

```
mosquitto_sub -h $MQTT_SERVER -t '/temperature'
Expand All @@ -47,6 +47,11 @@ You can turn the led on and off by publishing messages.
mosquitto_pub -h $MQTT_SERVER -t '/led' -m on
mosquitto_pub -h $MQTT_SERVER -t '/led' -m off
```
You can check the current the state of the led by subscribing to the /led/state topic on another machine.
```
mosquitto_sub -h $MQTT_SERVER -t '/led_state'
```


# Security

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