ESP8266 Gateway with AP mode instead of hardcoded ssid etc

  • Hi
    I want to change the ESP8266 gateway exampel in a way that i can use AP mode to configure the gateway on the fly instead of hardcoding SSID and PW in teh code.

    But: How can i stop the gateway starting when no WIFI SSID is set to start AP mode?

    I haven't understood the start phase completely.


  • @uwek
    It seems as the library only supports the defined DEFINE Variable
    (void)WiFi.begin(**MY_WIFI_SSID**, MY_WIFI_PASSWORD, 0, MY_WIFI_BSSID);

    Has anlyone an idea how to add some flexibility?


  • This is how I did it

     * 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 <>
     * Copyright (C) 2013-2015 Sensnology AB
     * Full contributor list:
     * Documentation:
     * Support Forum:
     * 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.
     * Version 1.0 - Henrik EKblad
     * Contribution by a-lurker and Anticimex,
     * Contribution by Norbert Truchsess <>
     * Contribution by Ivo Pullens (ESP8266 support)
     * The EthernetGateway sends data received from sensors to the WiFi link.
     * The gateway also accepts input on ethernet interface, which is then sent out to the radio network.
     * Enter "ip-number:port" in the ip-field of the Arduino GW device. This will temporarily override any serial configuration for the Vera plugin.
     * E.g. If you want to use the defualt values in this sketch enter:
     * LED purposes:
     * - To use the feature, uncomment any of the MY_DEFAULT_xx_LED_PINs in your sketch, only the LEDs that is defined is used.
     * - 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 for wiring instructions.
     * nRF24L01+  ESP8266
     * VCC        VCC
     * CE         GPIO4
     * CSN/CS     GPIO15
     * SCK        GPIO14
     * MISO       GPIO12
     * MOSI       GPIO13
     * GND        GND
     * Not all ESP8266 modules have all pins available on their external interface.
     * This code has been tested on an ESP-12 module.
     * The ESP8266 requires a certain pin configuration to download code, and another one to run code:
     * - Connect REST (reset) via 10K pullup resistor to VCC, and via switch to GND ('reset switch')
     * - Connect GPIO15 via 10K pulldown resistor to GND
     * - Connect CH_PD via 10K resistor to VCC
     * - Connect GPIO2 via 10K resistor to VCC
     * - Connect GPIO0 via 10K resistor to VCC, and via switch to GND ('bootload switch')
      * Inclusion mode button:
     * - Connect GPIO5 via switch to GND ('inclusion switch')
     * Hardware SHA204 signing is currently not supported!
     * Make sure to fill in your ssid and WiFi password below for ssid & pass.
    // Enable debug prints to serial monitor
    #define MY_DEBUG
    // Use a bit lower baudrate for serial prints on ESP8266 than default in MyConfig.h
    #define MY_BAUD_RATE 9600
    // Enables and select radio type (if attached)
    #define MY_RADIO_RF24
    //#define MY_RADIO_RFM69
    //#define MY_RF24_CHANNEL 100
    #define MY_RF24_PA_LEVEL  RF24_PA_LOW    //Sensor PA Level == RF24_PA_MIN=-18dBm, RF24_PA_LOW=-12dBm, RF24_PA_HIGH=-6dBM, and RF24_PA_MAX=0dBm
    #define MY_GATEWAY_ESP8266
    // Enable UDP communication
    //#define MY_USE_UDP
    // Set the hostname for the WiFi Client. This is the hostname
    // it will pass to the DHCP server if not static.
    //#define MY_ESP8266_HOSTNAME "mysensors-gateway"
    // Enable MY_IP_ADDRESS here if you want a static ip address (no DHCP)
    //#define MY_IP_ADDRESS 192,168,1,69
    // If using static ip you need to define Gateway and Subnet address as well
    #define MY_IP_GATEWAY_ADDRESS 192,168,1,254
    #define MY_IP_SUBNET_ADDRESS 255,255,255,0
    // The port to keep open on node server mode
    #define MY_PORT 5003
    // How many clients should be able to connect to this gateway (default 1)
    // 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, 178, 68
    // Enable inclusion mode
    // Enable Inclusion mode button on gateway
    // Set inclusion mode duration (in seconds)
    // Digital pin used for inclusion mode button
    // Set blinking period
    // Flash leds on rx/tx/err
    // Led pins used if blinking feature is enabled above
    #define MY_DEFAULT_ERR_LED_PIN 5  // Error led pin
    #define MY_DEFAULT_RX_LED_PIN  16  // Receive led pin
    #define MY_DEFAULT_TX_LED_PIN  2  // the PCB, on board LED
    #if defined(MY_USE_UDP)
    #include <WiFiUdp.h>
    #include <ESP8266WiFi.h>
    #include <MySensors.h>
    #include <DNSServer.h>
    #include <ESP8266WebServer.h>
    #include <WiFiManager.h>         //
    void setup()
        //Reset WiFi with push button on GPIO16.
        WiFiManager wifiManager;
        bool oldValue = digitalRead(16);
        if (oldValue == 0) {
        //fetches ssid and pass from eeprom and tries to connect
        //if it does not connect it starts an access point with the specified name
        //here  "MySensorsAP"
        //and goes into a blocking loop awaiting configuration
        //if you get here you have connected to the WiFi
        Serial.println("connected... :)");
    void presentation()
    	// Present locally attached sensors here
    void loop()
      // Send locally attached sensors data here

  • ough!!
    Cool, Soo easy, tststs...

    Thanks a lot...

  • Hello,

    but that is solution for non-MQTT GW, if you have ESP8266 with MQTT you still get

    Documents/Arduino/libraries/MySensors/core/MyGatewayTransportMQTTClient.cpp:257:33: error: 'MY_WIFI_PASSWORD' was not declared in this scope

    any solution for this ?
    thank you

  • But if you move ( or sold ) your gateway to different network, what seems as reason for selecting SSID and password,
    you still need recompile your code due to different IP of your controller.

  • Banned

    This post is deleted!

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