MagicMirror² v2.13.0 is available! For more information about this release, check out this topic.

MagicMirror and adruino over ethernet



  • Hello, everyone!
    I’m new here and to java programming. So I’ll have a lot of questions…

    I’m in process of buinding MagicMirror as a door for my electrical cabinet in my house.

    Anyway, I have build my own solar system using store bought solar panels and charge controller. Batteries are pulled from electrical forklift (460 kg) and as inverter, I’m using pure sine wave UPS used for powering servers in company I work at.

    To manage the system I’m using arduino nano wich is measuring panel voltage and current, battery voltage, battery current and current direction, inverter current, inverter temperature, and charge controller temperature.
    Data is transfered to arduino mega via rs485 located at my electrical cabinet. There arduino mega measures power usage and switches devices between solar and mains acording to load so battery doesent fall under 90% and maximum posible power produced by solar panels is used.

    Arduino mega, located at electrical cabinet, is running HTTP server to wich I can connect from my PC or mobile to view current status, statistics and errors.

    Now I want to make module for MagicMirror to display that data.

    Allso, I’m upgrading my natural gas heating system. I’m adding wood furnace and solar collectors. System will use similar management based on arduino and will probably be connected to MagicMirror.

    My problem is that I have no idea how to make javascript connection to arduino, nor how to send requests. But I can make responses from arduino in any format.

    P.S.
    Incidently, my surname is Magic. 😎



  • @Kereknjek I would see this module… MMM-ArduPort and how to send data from the arduino to the pi via serial

    I also had added an http server to my arduino ESP8266 NodeMCU and provided apis for data access as another route, which keeps the devices from having to be physically wired together



  • @Kereknjek said in MagicMirror and adruino over ethernet:

    Arduino mega, located at electrical cabinet, is running HTTP server to wich I can connect from my PC or mobile to view current status, statistics and errors.
    Now I want to make module for MagicMirror to display that data.

    how do you ‘view’ that



  • @sdetweil if u want to send requests (in code) to the arudino web server, its just a the nodejs request library

    see https://www.npmjs.com/package/request

    you could use my sample module. https://github.com/sdetweil/SampleModule
    there are also modules that will show ae existing page, MMM-IFrame



  • Arduino sends data formated as simple HTML page. Pure text.



  • Thank you!
    I’ll need some time to digest all the info you have provided. 😅



  • @Kereknjek no problem… come on back, there is all kinds of help around



  • @sdetweil said in MagicMirror and adruino over ethernet:

    @Kereknjek I would see this module… MMM-ArduPort and how to send data from the arduino to the pi via serial

    I also had added an http server to my arduino ESP8266 NodeMCU and provided apis for data access as another route, which keeps the devices from having to be physically wired together

    Your MMM-ArduPort module looks EXACTLY like what I had in mind!
    I’ll give it a detailed examination. 😃



  • I think that this is way to extensive for my knowledge. I can’t make heads or tails out of it…



  • @Kereknjek basically the arduino sends text strings with Serial.println("[COMMAND:NAME:DATA]")

    To transmit a sensor data to the module: `[sensor:SENSOR_NAME:SENSOR_VALUE]**

    Example:

    Serial.println("[sensor:MQ2:19]");
    Serial.println("[sensor:LM35:11]");
    Serial.println("[sensor:HCSR04:64]");

    but anyhow, lots of work in the arduino code to make this work


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