How to create a fake local sensor on Ethernet Gateway



  • Hi,

    I need some help in understanding the basics of MySensors library.

    To make the long story short I'm a beginner in both programming and Arduino. In most cases I'm able to understand how things work by looking at a working example and then modyfing it to do what I want it to. However after a lot of searching and reading I still can't get what goes where in MySensors.

    I want to make a thermostate based on Domoticz + Ethernet Gateway with locally attached sensors and one relay. For now I installed an example of 2.0 Ethernet Gateway that connects to Domoticz but obviously has nothing to present.

    Is it possible to present a simple static value as a fake reading of a temp sensor so I can see how the message is formatted, what goes into presentation() etc. ?

    I know it's all written in API section but I just don't get it.

    Thanks in advance


  • Mod

    @darkdude hi and welcome to the MySensors community.

    Funny thing, @martim asked a similar question yesterday, which got me thinking.

    Here is a simple example that will report the running time in seconds, once per second. So basically it will be a counter. Feedback is welcome.

    /**
       The MySensors Arduino library handles the wireless radio link and protocol
       between your home built sensors/actuators and HA controller of choice.
       The sensors forms a self healing radio network with optional repeaters. Each
       repeater and gateway builds a routing tables in EEPROM which keeps track of the
       network topology allowing messages to be routed to nodes.
    
       Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
       Copyright (C) 2013-2015 Sensnology AB
       Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
    
       Documentation: http://www.mysensors.org
       Support Forum: http://forum.mysensors.org
    
       This program is free software; you can redistribute it and/or
       modify it under the terms of the GNU General Public License
       version 2 as published by the Free Software Foundation.
    
     *******************************
    
       REVISION HISTORY
       Version 1.0 - Henrik EKblad
    
       DESCRIPTION
       This sketch provides an example how to implement a distance sensor using HC-SR04
       http://www.mysensors.org/build/distance
    */
    
    // Enable debug prints
    #define MY_DEBUG
    
    // Enable and select radio type attached
    #define MY_RADIO_NRF24
    //#define MY_RADIO_RFM69
    
    #include <MySensors.h>
    
    #define CHILD_ID 1
    unsigned long SLEEP_TIME = 1000; // Sleep time between sends (in milliseconds)
    
    MyMessage msg(CHILD_ID, V_TEXT);
    
    void setup()
    {
    
    }
    
    void presentation() {
      // Send the sketch version information to the gateway and Controller
      sendSketchInfo("Dummy sensor", "1.0");
    
      // Register all sensors to gw (they will be created as child devices)
      present(CHILD_ID, S_INFO);
    }
    
    void loop()
    {
      unsigned int seconds = millis() / 1000;
      Serial.print("Seconds since start: ");
      Serial.println(seconds);
    
      send(msg.set(seconds));
      sleep(SLEEP_TIME);
    }
    


  • Hi,

    Thanks for your answer!

    I combined your code with my gateway setup:

    /**
     * The MySensors Arduino library handles the wireless radio link and protocol
     * between your home built sensors/actuators and HA controller of choice.
     * The sensors forms a self healing radio network with optional repeaters. Each
     * repeater and gateway builds a routing tables in EEPROM which keeps track of the
     * network topology allowing messages to be routed to nodes.
     *
     * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
     * Copyright (C) 2013-2015 Sensnology AB
     * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
     *
     * Documentation: http://www.mysensors.org
     * Support Forum: http://forum.mysensors.org
     *
     * This program is free software; you can redistribute it and/or
     * modify it under the terms of the GNU General Public License
     * version 2 as published by the Free Software Foundation.
     *
     *******************************
     *
     * REVISION HISTORY
     * Version 1.0 - Henrik EKblad
     * Contribution by a-lurker and Anticimex,
     * Contribution by Norbert Truchsess <norbert.truchsess@t-online.de>
     * Contribution by Tomas Hozza <thozza@gmail.com>
     *
     *
     * DESCRIPTION
     * The EthernetGateway sends data received from sensors to the ethernet link.
     * The gateway also accepts input on ethernet interface, which is then sent out to the radio network.
     *
     * The GW code is designed for Arduino 328p / 16MHz.  ATmega168 does not have enough memory to run this program.
     *
     * LED purposes:
     * - To use the feature, uncomment WITH_LEDS_BLINKING in MyConfig.h
     * - RX (green) - blink fast on radio message recieved. In inclusion mode will blink fast only on presentation recieved
     * - TX (yellow) - blink fast on radio message transmitted. In inclusion mode will blink slowly
     * - ERR (red) - fast blink on error during transmission error or recieve crc error
     *
     * See http://www.mysensors.org/build/ethernet_gateway for wiring instructions.
     *
     */
    
    // Enable debug prints to serial monitor
    #define MY_DEBUG 
    
    // Enable and select radio type attached
    //#define MY_RADIO_NRF24
    //#define MY_RADIO_RFM69
    
    // Enable gateway ethernet module type 
    #define MY_GATEWAY_W5100
    
    // W5100 Ethernet module SPI enable (optional if using a shield/module that manages SPI_EN signal)
    //#define MY_W5100_SPI_EN 4  
    
    // Enable Soft SPI for NRF radio (note different radio wiring is required)
    // The W5100 ethernet module seems to have a hard time co-operate with 
    // radio on the same spi bus.
    #if !defined(MY_W5100_SPI_EN) && !defined(ARDUINO_ARCH_SAMD)
      #define MY_SOFTSPI
      #define MY_SOFT_SPI_SCK_PIN 14
      #define MY_SOFT_SPI_MISO_PIN 16
      #define MY_SOFT_SPI_MOSI_PIN 15
    #endif  
    
    // When W5100 is connected we have to move CE/CSN pins for NRF radio
    #ifndef MY_RF24_CE_PIN 
      #define MY_RF24_CE_PIN 5
    #endif
    #ifndef MY_RF24_CS_PIN 
      #define MY_RF24_CS_PIN 6
    #endif
    
    // Enable to UDP          
    //#define MY_USE_UDP
    
    #define MY_IP_ADDRESS 192,168,1,122   // If this is disabled, DHCP is used to retrieve address
    // Renewal period if using DHCP
    //#define MY_IP_RENEWAL_INTERVAL 60000
    // The port to keep open on node server mode / or port to contact in client mode
    #define MY_PORT 5003      
    
    // Controller ip address. Enables client mode (default is "server" mode). 
    // Also enable this if MY_USE_UDP is used and you want sensor data sent somewhere. 
    #define MY_CONTROLLER_IP_ADDRESS 192, 168, 1, 105  
     
    // The MAC address can be anything you want but should be unique on your network.
    // Newer boards have a MAC address printed on the underside of the PCB, which you can (optionally) use.
    // Note that most of the Ardunio examples use  "DEAD BEEF FEED" for the MAC address.
    #define MY_MAC_ADDRESS 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
    
    // Flash leds on rx/tx/err
    #define MY_LEDS_BLINKING_FEATURE
    // Set blinking period
    #define MY_DEFAULT_LED_BLINK_PERIOD 300
    
    // Enable inclusion mode
    //#define MY_INCLUSION_MODE_FEATURE
    // Enable Inclusion mode button on gateway
    //#define MY_INCLUSION_BUTTON_FEATURE
    // Set inclusion mode duration (in seconds)
    //#define MY_INCLUSION_MODE_DURATION 60 
    // Digital pin used for inclusion mode button
    //#define MY_INCLUSION_MODE_BUTTON_PIN  3 
    
    // Uncomment to override default HW configurations
    //#define MY_DEFAULT_ERR_LED_PIN 7  // Error led pin
    //#define MY_DEFAULT_RX_LED_PIN  8  // Receive led pin
    //#define MY_DEFAULT_TX_LED_PIN  9  // the PCB, on board LED
    
    #include <SPI.h>
    
    #if defined(MY_USE_UDP)
      #include <EthernetUdp.h>
    #endif
    #include <Ethernet.h>
    #include <MySensors.h>
    
    #define CHILD_ID 1
    unsigned long SLEEP_TIME = 1000; // Sleep time between sends (in milliseconds)
    
    MyMessage msg(CHILD_ID, V_TEXT);
    
    
    void setup()
    {
    }
    
    void presentation() {
      // Send the sketch version information to the gateway and Controller
      sendSketchInfo("Dummy sensor", "1.0");
    
      // Register all sensors to gw (they will be created as child devices)
      present(CHILD_ID, S_INFO);
    }
    
    void loop()
    {
      unsigned int seconds = millis() / 1000;
      Serial.print("Seconds since start: ");
      Serial.println(seconds);
    
      send(msg.set(seconds));
      sleep(SLEEP_TIME);
    }
    

    I had to enable client mode (it just restarted after every loop without it). However it still does nor register as a sensor in Domoticz.
    In Domoticz log there is:

    2016-10-18 13:10:17.041 MySensors: connected to: 192.168.1.122:5003
    

    In Devices i have

    MySensors Gateway with LAN interface
    Version: ? 
    

    Serial monitor gives:

    0;255;3;0;9;Starting gateway (1
    Seconds since start: 1
    Seconds since start: 1
    Seconds since start: 1
    0;255;3;0;9;Starting gateway (R-NGA-, 2.0.0)
    IP: 192.168.1.122
    0;255;3;0;9;No registration required
    0;255;3;0;9;Init complete, id=0, parent=0, distance=0, registration=1
    Seconds since start: 1
    Seconds since start: 1
    Seconds since start: 1
    Seconds since start: 1
    Seconds since start: 1
    Seconds since start: 1
    Seconds since start: 1
    Seconds since start: 1
    

    I added

    seconds ++
    

    to your code and it now counts correctly but still does not register as a sensor.

    Regarding a need for a "Dummy" example.

    In my case here the problem is in using libraries or understanding how they work. For now it's like:

    MyMessage msg(CHILD_ID, V_TEXT);
    

    CHILD_ID - OK, it's defined allright
    V_TEXT - it's not edfined in this sketch and I don't know where it comes from

    It's the same with

    present(CHILD_ID, S_INFO);
    

    After finishing some basic projects I would try to define S_INFO and send sensor data there...

    However after seeing a dummy sensor actually register and "work" in Domoticz I should be able to play with it for a bit, change its value and then connect a real sensor. And that should give me enough knowledge to try other sensor types.

    I asked especially for a dummy temp sensor because temp sensors are easy to use, they are a basic example in many Arduino courses.

    Regards


  • Mod

    @darkdude V_TEXT and S_INFO are described in the API documentation, https://www.mysensors.org/download/serial_api_20#presentation

    Switch from

    MyMessage msg(CHILD_ID, V_TEXT);
    present(CHILD_ID, S_INFO);
    
    

    to

    MyMessage msg(CHILD_ID, V_TEMP);
    present(CHILD_ID, S_TEMP);
    

    to simulate a temperature sensor instead. This is shown in the temperature example.

    I don't know why the sensor doesn't show up in Domoticz. I have no experience with ethernet gateway and I have never used V_TEXT/S_INFO, it could be that Domoticz handles them in a special way.

    Having to add seconds++ is seriously strange. I don't have a clue why the millis function doesn't work on your device, and adding seconds++ should not work since the variable is re-initilaized each time the loop is run.



  • Hi,
    I tried to create an ethernet gateway + one dummy sensor , like in above exemple. My controller is domoticz for windows.
    I tried this code :

    /**
     * The MySensors Arduino library handles the wireless radio link and protocol
     * between your home built sensors/actuators and HA controller of choice.
     * The sensors forms a self healing radio network with optional repeaters. Each
     * repeater and gateway builds a routing tables in EEPROM which keeps track of the
     * network topology allowing messages to be routed to nodes.
     *
     * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
     * Copyright (C) 2013-2015 Sensnology AB
     * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
     *
     * Documentation: http://www.mysensors.org
     * Support Forum: http://forum.mysensors.org
     *
     * This program is free software; you can redistribute it and/or
     * modify it under the terms of the GNU General Public License
     * version 2 as published by the Free Software Foundation.
     *
     *******************************
     *
     * REVISION HISTORY
     * Version 1.0 - Henrik EKblad
     * Contribution by a-lurker and Anticimex,
     * Contribution by Norbert Truchsess <norbert.truchsess@t-online.de>
     * Contribution by Tomas Hozza <thozza@gmail.com>
     *
     *
     * DESCRIPTION
     * The EthernetGateway sends data received from sensors to the ethernet link.
     * The gateway also accepts input on ethernet interface, which is then sent out to the radio network.
     *
     * The GW code is designed for Arduino 328p / 16MHz.  ATmega168 does not have enough memory to run this program.
     *
     * LED purposes:
     * - To use the feature, uncomment WITH_LEDS_BLINKING in MyConfig.h
     * - RX (green) - blink fast on radio message recieved. In inclusion mode will blink fast only on presentation recieved
     * - TX (yellow) - blink fast on radio message transmitted. In inclusion mode will blink slowly
     * - ERR (red) - fast blink on error during transmission error or recieve crc error
     *
     * See http://www.mysensors.org/build/ethernet_gateway for wiring instructions.
     *
     */
    
    // Enable debug prints to serial monitor
    #define MY_DEBUG 
    
    // Enable and select radio type attached
    //#define MY_RADIO_NRF24
    //#define MY_RADIO_RFM69
    
    // Enable gateway ethernet module type 
    #define MY_GATEWAY_W5100
    
    // W5100 Ethernet module SPI enable (optional if using a shield/module that manages SPI_EN signal)
    //#define MY_W5100_SPI_EN 4  
    
    // Enable Soft SPI for NRF radio (note different radio wiring is required)
    // The W5100 ethernet module seems to have a hard time co-operate with 
    // radio on the same spi bus.
    #if !defined(MY_W5100_SPI_EN) && !defined(ARDUINO_ARCH_SAMD)
      #define MY_SOFTSPI
      #define MY_SOFT_SPI_SCK_PIN 14
      #define MY_SOFT_SPI_MISO_PIN 16
      #define MY_SOFT_SPI_MOSI_PIN 15
    #endif  
    
    // When W5100 is connected we have to move CE/CSN pins for NRF radio
    #ifndef MY_RF24_CE_PIN 
      #define MY_RF24_CE_PIN 5
    #endif
    #ifndef MY_RF24_CS_PIN 
      #define MY_RF24_CS_PIN 6
    #endif
    
    // Enable to UDP          
    //#define MY_USE_UDP
    
    #define MY_IP_ADDRESS 192,168,0,125  // If this is disabled, DHCP is used to retrieve address
    // Renewal period if using DHCP
    //#define MY_IP_RENEWAL_INTERVAL 60000
    // The port to keep open on node server mode / or port to contact in client mode
    #define MY_PORT 5003      
    
    // Controller ip address. Enables client mode (default is "server" mode). 
    // Also enable this if MY_USE_UDP is used and you want sensor data sent somewhere. 
    #define MY_CONTROLLER_IP_ADDRESS 192, 168, 0, 100  
     
    // The MAC address can be anything you want but should be unique on your network.
    // Newer boards have a MAC address printed on the underside of the PCB, which you can (optionally) use.
    // Note that most of the Ardunio examples use  "DEAD BEEF FEED" for the MAC address.
    #define MY_MAC_ADDRESS 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
    
    // Flash leds on rx/tx/err
    #define MY_LEDS_BLINKING_FEATURE
    // Set blinking period
    #define MY_DEFAULT_LED_BLINK_PERIOD 300
    
    // Enable inclusion mode
    //#define MY_INCLUSION_MODE_FEATURE
    // Enable Inclusion mode button on gateway
    //#define MY_INCLUSION_BUTTON_FEATURE
    // Set inclusion mode duration (in seconds)
    //#define MY_INCLUSION_MODE_DURATION 60 
    // Digital pin used for inclusion mode button
    //#define MY_INCLUSION_MODE_BUTTON_PIN  3 
    
    // Uncomment to override default HW configurations
    //#define MY_DEFAULT_ERR_LED_PIN 7  // Error led pin
    //#define MY_DEFAULT_RX_LED_PIN  8  // Receive led pin
    //#define MY_DEFAULT_TX_LED_PIN  9  // the PCB, on board LED
    
    #include <SPI.h>
    
    #if defined(MY_USE_UDP)
      #include <EthernetUdp.h>
    #endif
    #include <Ethernet.h>
    #include <MySensors.h>
    
    #define CHILD_ID 1
    unsigned long SLEEP_TIME = 1000; // Sleep time between sends (in milliseconds)
    
    MyMessage msg(CHILD_ID, V_TEMP);
    unsigned int seconds = 0;
    
    void setup()
    {
    }
    
    void presentation() {
      // Send the sketch version information to the gateway and Controller
      sendSketchInfo("Dummy sensor", "1.0");
    
      // Register all sensors to gw (they will be created as child devices)
      present(CHILD_ID, S_TEMP);
    }
    
    void loop()
    {
      seconds = seconds + 1;
      Serial.print("Seconds since start: ");
      Serial.println(seconds);
    
      send(msg.set(seconds, 1));
      sleep(SLEEP_TIME);
    }
    

    Controller seems to connect to gateway but no devices were found:

    alt text

    Also, serial monitor gives:

    alt text

    Any ideas why my dummy sensor is not recognized ?

    UPDATE: I managed to make above code run by removing

    #define MY_CONTROLLER_IP_ADDRESS 192, 168, 0, 100  
    

    Regards


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