WiFi Gateway (ESP8266) - reconnect to wifi router

  • i have this problem: if i reboot my wifi router mysensors wifi gateway wouldn't try to connect again, is this only with me or its common issue with wifi gateway?

  • @pihome Not a common issue with wifi gateway I guess, since mine reconnects to the router with no issue. You referring to reconnect to the router and not to the controller, are you?

    I'm using a Wemos D1 R2 plus as the gateway but this shouldn't make a difference.

  • @manutremo thank you reply. Yes i was referring to wifi gateway connection to wifi router.
    I.e if I rebooted my wifi router my wifi gateway do not re-establish connection to wifi router until unless i reset wifi gateway

  • What do you see on your gw log when the connection to the router is lost?

  • This is getting very odd, now if I connect my gateway to computer I don’t see anything on serial port, but i can talk to controler and get all nodes data which confirm it’s working.

  • That's odd - I assume you've checked port, bitrate, etc...

    If your gw is communicating via IP (I guess that's the case since you mention a wifi gw), you can also "spy" the communication between the gw and the controller by telnetting to the gw IP and port 5003 (assuming default hasn't been changed).

  • here is log when gateway is connected to wifi router, and then i powered off wifi router and then in few seconds powered on again, all other devicess connected to wifi router as expected apart from mysensors esp gateway. no special code in my gateway controller sketch.

    pm open,type:2 0
    0;255;3;0;9;Client 0 connected
    ap_probe_send over, rest wifi status to disassoc
    state: 5 -> 0 (1)
    rm 0
    pm close 7
    f r0, 0;255;3;0;9;Client 0 disconnected
    no mynet-915C found, reconnect after 1s
    f 0, scandone
    no mynet-915C found, reconnect after 1s
    f -180, scandone
    state: 0 -> 2 (b0)
    state: 2 -> 3 (0)
    state: 3 -> 5 (10)
    add 0
    aid 1
    connected with mynet-915C, channel 7
    dhcp client start...
    pm open,type:2 0

  • I'm not sure i'm following you... from the low the gw seems to be reconnecting, it gets ip after the router restarts and starts to receive messages from what seems to be a node.

  • it looks from log as it is connected to wifi but i can not even ping mysensors gateway, until i press reset button on esp.
    yes you are right gateway receive all message from notes.

  • Mod

    Did you try latest mysensors 2.2 development?

  • Hello,

    do you use only the Gateway Code or is there anybody else in your code?
    If you do anybody else you need delays in the code.
    I think the Arduino "delay()" not the "wait()".
    Wait do Mysensors things.
    Delay do WIFI things.


  • Mod

    I think you could check every minute or so if wifi connection is established and if not call the connection routine (that should be basic esp8266 stuff)

  • its basic gateway code nothing else, just copy and paste from mysensors. i added that nrf

     * 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.
     * Version 1.0 - Henrik EKblad
     * Contribution by a-lurker and Anticimex,
     * Contribution by Norbert Truchsess <norbert.truchsess@t-online.de>
     * 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 http://www.mysensors.org/build/esp8266_gateway 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_NRF24
    //#define MY_RADIO_RFM69
    // i added this later to see this may be the cause as i have channel number etc in other sensors. 
    #define MY_RF24_PA_LEVEL RF24_PA_MAX
    //#define MY_DEBUG_VERBOSE_RF24
    // RF channel for the sensor net, 0-127
    #define RF24_CHANNEL     125
    //RF24_250KBPS for 250kbs, RF24_1MBPS for 1Mbps, or RF24_2MBPS for 2Mbps
    #define RF24_DATARATE 	   RF24_250KBPS
    #define MY_GATEWAY_ESP8266
    #define MY_ESP8266_SSID "wifi"
    #define MY_ESP8266_PASSWORD "wifi-pass"
    // 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 "PiHome_Gateway"
    // Enable MY_IP_ADDRESS here if you want a static ip address (no DHCP)
    //#define MY_IP_ADDRESS 192,168,99,4
    // If using static ip you need to define Gateway and Subnet address as well
    //#define MY_IP_GATEWAY_ADDRESS 192,168,99,1
    //#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
    // #define MY_DEFAULT_LED_BLINK_PERIOD 300
    // Flash leds on rx/tx/err
    // Led pins used if blinking feature is enabled above
    #define MY_DEFAULT_ERR_LED_PIN 16  // Error led pin
    #define MY_DEFAULT_RX_LED_PIN  16  // Receive led pin
    #define MY_DEFAULT_TX_LED_PIN  16  // the PCB, on board LED
    #if defined(MY_USE_UDP)
    #include <WiFiUdp.h>
    #include <ESP8266WiFi.h>
    #include <MySensors.h>
    void setup()
    void presentation()
    	// Present locally attached sensors here
    void loop()
    	// Send locally attached sensors data here

  • @pihome Hello,

    and what type of ESP8266 you have?
    Can you try a other one?
    I have some NodeMCU V0.9 with TCP and UDP in client mode with AVM Router and Repeater.
    Without problems.


  • Hello,

    The NodeMCU looks like my.
    and your ESP8266 Arduino version?
    maybe there is a new version.
    What Router or Access Point do you use?


  • Arduino 1.8.3 and ESP library is all updated. i m using vodafone router.

  • Hello,

    i try to build new Gateway for my Problem and Upload the same sketch, but the new Gateway do not connect to the router. I reminded the China NodeMCU have problems with Serial.begin and with WIFI.beginn. It need a delay after.
    I found the WIFI.begin in the "MyGatewayTransportEthernet.cpp" file and see a wait(500). See my last post wait/delay, so I changed from wait to delay and the Gateway connect.
    If you can try to change it too or change from 500 to 1000.
    But i use the 2.2.0 dev.


  • @thomasdr thank you for the info, and sorry for late reply, changing wait(500) to delay(500) worked.

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