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There are a number of ESP8266 and ESP32 devices in operation connecting to the MQTT network. This page is to keep track on where they are and what code is loaded on them.
|whitesp||IR temp||Room 29||JMDN/P/IR||2019-05-01|
|esp8266LOLIN||2C:3A:E8:0F:1D:C7||10.0.31.229||LED ticker||Room1 main window||JMDN/P/LED||2019-06-24|
|esp32co2||B4:E6:2D:8C:1F:B1||10.0.37.127||CO2 ppm||Room1 TV wall||JMDN/SK/Main||2019-06-22|
|esp8266B||EC:FA:BC:A7:A8:07||10.0.35.194||Temp strng||Room1-29 window||JMDN/SK/esp8266_Main||2019-06-28|
|esp32powflash||Electric use||Meter room||JMDN/SK/esp8266_Main||2019-06-24|
The all-in-one ESP32 based sensor identification and display code is at: "Sensor_Kennel/Main"
You can get the ip-numbers of all these devices with the command:
mosquitto_sub -v -h mqtt.local -t "+/ip". See all the data from a device with:
mosquitto_sub -v -h mqtt.local -t "esp32co2/#". Send a message to be displayed on a device with:
mosquitto_sub -h mqtt.local -t "esp32co2/message" -m "Hi there".
The all-in-one code that handles many I2C sensors wired onto an ESP32 is at: https://github.com/goatchurchprime/jupyter_micropython_developer_notebooks/blob/master/Sensor_Kennel/Main.ipynb This can run an OLED screen (if it exists), connect to the MQTT server. The code is based on an adaptation of the asynchronous MQTT library with mDNS implemented.
The ESP8266 has a WebREPL command line system that uses a socket by pasting in the ipnumber in place of 192.168.4.1, clicking on "Connect" and using the password "wpass". (The WebREPL system on the ESP32 only works when there is no program running, and so it is almost useless.)
The minimal mDNS implementation does not work, so the ipnumber of the mqttbroker have to be hard-coded.
The ipnumber of the mqttbroker is 10.0.30.194 (when on ethernet wire) or 10.0.30.130 when working from wifi.