ESP8266 Community Forum

Posted: **Tue Jan 23, 2018 2:05 pm**

I have a NodeMCU that I'm using with the Arduino based WeatherStationDemo code. At home, it seemed to work fine. At work, I can't seem to keep it connected. Both networks are WPA2, however the work network is Cisco Meraki.

It always connects just fine initially. But on second refresh (10 minutes) it doesn't seem like it wants to pull data from the API's for Weather Underground or ThingSpeak. Actually quite horribly flaky. Sometimes it crashes, sometimes it times out getting data.

Usually I can do a continuous ping to the device even when it won't pull up the web page, unless it crashes.

I've got a little Pi/Arduino experience but not a ton. I'm actually taking the WeatherStationDemo and the Temp/Humidity Demo code and smashing them together. I'm sure I'm doing something stupid in the code though.

Any thoughts - please be gentle

Code: Select all

/**The MIT License (MIT)

Copyright (c) 2016 by Daniel Eichhorn

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

See more at http://blog.squix.ch
*/

#include <ESP8266WiFi.h>
#include <Ticker.h>
#include "DHT.h"
#include <JsonListener.h>
#include "SSD1306Wire.h"
#include "OLEDDisplayUi.h"
#include "Wire.h"
#include "WundergroundClient.h"
#include "WeatherStationFonts.h"
#include "WeatherStationImages.h"
#include "TimeClient.h"
#include "ThingspeakClient.h"

/***************************
 * Begin Settings
 **************************/
// Please read http://blog.squix.org/weatherstation-getting-code-adapting-it
// for setup instructions

// WIFI
// const char* WIFI_SSID = "dd-wrt";
//const char* WIFI_PWD = "jameshenry";
const char* WIFI_SSID = "ieeegswpa";
const char* WIFI_PWD = "T3stk3y1";


// Setup
const int UPDATE_INTERVAL_SECS = 10 * 60; // Update every 10 minutes

// Display Settings
const int I2C_DISPLAY_ADDRESS = 0x3c;
const int SDA_PIN = D3;
const int SDC_PIN = D4;

// TimeClient settings
const float UTC_OFFSET = -5;

// Wunderground Settings
const boolean IS_METRIC = false;
const String DEGREES = "°F";

const String WUNDERGRROUND_API_KEY = "a29b5a272975bc3d";
const String WUNDERGRROUND_LANGUAGE = "EN";
const String WUNDERGROUND_COUNTRY = "US";
const String WUNDERGROUND_CITY = "Valatie";

//Thingspeak Settings
const String THINGSPEAK_CHANNEL_ID = "407185";
const String THINGSPEAK_API_READ_KEY = "AOPWC4PHTL0FSNX6";

// Initialize the oled display for address 0x3c
// sda-pin=14 and sdc-pin=12
SSD1306Wire     display(I2C_DISPLAY_ADDRESS, SDA_PIN, SDC_PIN);
OLEDDisplayUi   ui( &display );

/***************************
 * Thingspeak Logger Settings
 ***************************/
const char* host = "api.thingspeak.com";
const char* THINGSPEAK_API_KEY = "5ILNRMM7RVR0716C";

// DHT Settings
#define DHTPIN D6     // what digital pin we're connected to. If you are not using NodeMCU change D6 to real pin


// Uncomment whatever type you're using!
#define DHTTYPE DHT11   // DHT 11
//#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
//#define DHTTYPE DHT21   // DHT 21 (AM2301)

/***************************
 * End Settings
 **************************/

TimeClient timeClient(UTC_OFFSET);

// Set to false, if you prefere imperial/inches, Fahrenheit
WundergroundClient wunderground(IS_METRIC);

ThingspeakClient thingspeak;

// flag changed in the ticker function every 10 minutes
bool readyForWeatherUpdate = false;

String lastUpdate = "--";

Ticker ticker;

//declaring prototypes
void drawProgress(OLEDDisplay *display, int percentage, String label);
void updateData(OLEDDisplay *display);
void drawDateTime(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y);
void drawCurrentWeather(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y);
void drawForecast(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y);
void drawThingspeak(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y);
void drawForecastDetails(OLEDDisplay *display, int x, int y, int dayIndex);
void drawHeaderOverlay(OLEDDisplay *display, OLEDDisplayUiState* state);
void setReadyForWeatherUpdate();
void updateThingSpeak();
void startWiFi(void);

// Add frames
// this array keeps function pointers to all frames
// frames are the single views that slide from right to left
FrameCallback frames[] = { drawDateTime, drawCurrentWeather, drawForecast, drawThingspeak };
int numberOfFrames = 4;

OverlayCallback overlays[] = { drawHeaderOverlay };
int numberOfOverlays = 1;

// Initialize the temperature/ humidity sensor
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  Serial.println();
  Serial.println();
  delay(10);
  // initialize dispaly
  display.init();
  display.clear();
  display.display();

  //display.flipScreenVertically();
  display.setFont(ArialMT_Plain_10);
  display.setTextAlignment(TEXT_ALIGN_CENTER);
  display.setContrast(255);

  //WiFi.begin(WIFI_SSID, WIFI_PWD);
  startWiFi();

  ui.setTargetFPS(30);

  ui.setActiveSymbol(activeSymbole);
  ui.setInactiveSymbol(inactiveSymbole);

  // You can change this to
  // TOP, LEFT, BOTTOM, RIGHT
  ui.setIndicatorPosition(BOTTOM);

  // Defines where the first frame is located in the bar.
  ui.setIndicatorDirection(LEFT_RIGHT);

  // You can change the transition that is used
  // SLIDE_LEFT, SLIDE_RIGHT, SLIDE_TOP, SLIDE_DOWN
  ui.setFrameAnimation(SLIDE_LEFT);

  ui.setFrames(frames, numberOfFrames);

  ui.setOverlays(overlays, numberOfOverlays);

  // Inital UI takes care of initalising the display too.
  ui.init();

  Serial.println("");
  Serial.println("Updating ThingSpeak");
  updateThingSpeak();
  
  updateData(&display);
  
  ticker.attach(UPDATE_INTERVAL_SECS, setReadyForWeatherUpdate);

}

void loop() {

  if (readyForWeatherUpdate && ui.getUiState()->frameState == FIXED) {
    updateData(&display);
    updateThingSpeak();
  }


  int remainingTimeBudget = ui.update();

  if (remainingTimeBudget > 0) {
    // You can do some work here
    // Don't do stuff if you are below your
    // time budget.
    delay(remainingTimeBudget);
  }
}

void drawProgress(OLEDDisplay *display, int percentage, String label) {
  display->clear();
  display->setTextAlignment(TEXT_ALIGN_CENTER);
  display->setFont(ArialMT_Plain_10);
  display->drawString(64, 10, label);
  display->drawProgressBar(2, 28, 124, 10, percentage);
  display->display();
}

void updateData(OLEDDisplay *display) {
  drawProgress(display, 10, "Updating time...");
  timeClient.updateTime();
  drawProgress(display, 30, "Updating conditions...");
  wunderground.updateConditions(WUNDERGRROUND_API_KEY, WUNDERGRROUND_LANGUAGE, WUNDERGROUND_COUNTRY, WUNDERGROUND_CITY);
  drawProgress(display, 50, "Updating forecasts...");
  wunderground.updateForecast(WUNDERGRROUND_API_KEY, WUNDERGRROUND_LANGUAGE, WUNDERGROUND_COUNTRY, WUNDERGROUND_CITY);
  drawProgress(display, 80, "Updating thingspeak...");
  thingspeak.getLastChannelItem(THINGSPEAK_CHANNEL_ID, THINGSPEAK_API_READ_KEY);
  lastUpdate = timeClient.getFormattedTime();
  readyForWeatherUpdate = false;
  drawProgress(display, 100, "Done...");
  delay(1000);
}



void drawDateTime(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y) {
  display->setTextAlignment(TEXT_ALIGN_CENTER);
  display->setFont(ArialMT_Plain_10);
  String date = wunderground.getDate();
  int textWidth = display->getStringWidth(date);
  display->drawString(64 + x, 5 + y, date);
  display->setFont(ArialMT_Plain_24);
  String time = timeClient.getFormattedTime();
  textWidth = display->getStringWidth(time);
  display->drawString(64 + x, 15 + y, time);
  display->setTextAlignment(TEXT_ALIGN_LEFT);
}

void drawCurrentWeather(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y) {
  display->setFont(ArialMT_Plain_10);
  display->setTextAlignment(TEXT_ALIGN_LEFT);
  display->drawString(60 + x, 5 + y, wunderground.getWeatherText());

  display->setFont(ArialMT_Plain_24);
  String temp = wunderground.getCurrentTemp() + DEGREES;
  display->drawString(60 + x, 15 + y, temp);
  int tempWidth = display->getStringWidth(temp);

  display->setFont(Meteocons_Plain_42);
  String weatherIcon = wunderground.getTodayIcon();
  int weatherIconWidth = display->getStringWidth(weatherIcon);
  display->drawString(32 + x - weatherIconWidth / 2, 05 + y, weatherIcon);
}


void drawForecast(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y) {
  drawForecastDetails(display, x, y, 0);
  drawForecastDetails(display, x + 44, y, 2);
  drawForecastDetails(display, x + 88, y, 4);
}

void drawThingspeak(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y) {
  display->setTextAlignment(TEXT_ALIGN_CENTER);
  display->setFont(ArialMT_Plain_10);
  display->drawString(64 + x, 0 + y, "Indoor");
  display->setFont(ArialMT_Plain_16);
  display->drawString(64 + x, 10 + y, thingspeak.getFieldValue(0) + DEGREES);
  display->drawString(64 + x, 30 + y, thingspeak.getFieldValue(1) + "%");
}

void drawForecastDetails(OLEDDisplay *display, int x, int y, int dayIndex) {
  display->setTextAlignment(TEXT_ALIGN_CENTER);
  display->setFont(ArialMT_Plain_10);
  String day = wunderground.getForecastTitle(dayIndex).substring(0, 3);
  day.toUpperCase();
  display->drawString(x + 20, y, day);

  display->setFont(Meteocons_Plain_21);
  display->drawString(x + 20, y + 12, wunderground.getForecastIcon(dayIndex));

  display->setFont(ArialMT_Plain_10);
  display->drawString(x + 20, y + 34, wunderground.getForecastLowTemp(dayIndex) + "|" + wunderground.getForecastHighTemp(dayIndex));
  display->setTextAlignment(TEXT_ALIGN_LEFT);
}

void drawHeaderOverlay(OLEDDisplay *display, OLEDDisplayUiState* state) {
  display->setColor(WHITE);
  display->setFont(ArialMT_Plain_10);
  String time = timeClient.getFormattedTime().substring(0, 5);
  display->setTextAlignment(TEXT_ALIGN_LEFT);
  display->drawString(0, 54, time);
  display->setTextAlignment(TEXT_ALIGN_RIGHT);
  String temp = wunderground.getCurrentTemp() + DEGREES;
  display->drawString(128, 54, temp);
  display->drawHorizontalLine(0, 52, 128);
}

void setReadyForWeatherUpdate() {
  Serial.println("Setting readyForUpdate to true");
  readyForWeatherUpdate = true;
}

void startWiFi(void) {
    // Connect to WiFi network
    Serial.println();
    delay(10);
    Serial.println();
    delay(10);
    Serial.print("Connecting to ");
    delay(10);
    Serial.println(WIFI_SSID);
    delay(10);
    WiFi.begin(WIFI_SSID, WIFI_PWD);

    int counter = 0;
    while (WiFi.status() != WL_CONNECTED) {
      delay(500);
      Serial.print(".");
      display.clear();
      display.drawString(64, 10, "Connecting to WiFi");
      display.drawXbm(46, 30, 8, 8, counter % 3 == 0 ? activeSymbole : inactiveSymbole);
      display.drawXbm(60, 30, 8, 8, counter % 3 == 1 ? activeSymbole : inactiveSymbole);
      display.drawXbm(74, 30, 8, 8, counter % 3 == 2 ? activeSymbole : inactiveSymbole);
      display.display();
  
      counter++;
    }
    Serial.println("");
    Serial.println("WiFi connected");

     // Print the IP address
    Serial.print("ESP8266 IP: ");
    Serial.println(WiFi.localIP());


}

void updateThingSpeak() {

    Serial.print("connecting to ");
    Serial.println(host);
    
    // Use WiFiClient class to create TCP connections
    WiFiClient client;
    const int httpPort = 80;
    if (!client.connect(host, httpPort)) {
      Serial.println("connection failed");
      return;
    }

// read values from the sensor
    float humidity = dht.readHumidity();
    float temperature = dht.readTemperature(!IS_METRIC);
    Serial.print("Humidity from Sensor:    ");
    Serial.println(humidity);
    Serial.print("Temperature from sensor: ");
    Serial.println(temperature);
    // We now create a URI for the request
    String url = "/update?api_key=";
    url += THINGSPEAK_API_KEY;
    url += "&field1=";
    url += String(temperature);
    url += "&field2=";
    url += String(humidity);
    
    Serial.print("Requesting URL: ");
    Serial.println(url);
    
    // This will send the request to the server
    client.print(String("GET ") + url + " HTTP/1.1\r\n" +
                 "Host: " + host + "\r\n" + 
                 "Connection: close\r\n\r\n");
    delay(10);
    int unavailableCount = 0;
    while(!client.available()){
      delay(100);
      Serial.print(".");
      unavailableCount++;
      Serial.println(unavailableCount);
    }
    // Read all the lines of the reply from server and print them to Serial
    while(client.available()){
      String line = client.readStringUntil('\r');
      Serial.print(line);
    }
}

Posted: **Tue Jan 23, 2018 10:29 pm**

After changing some port values I compiled the code above. It seems to work. I don't have one of those sensors connected to the test platform so I don't know what kind of effect that would have. The value displayed is NAN, which seems to be normal for a missing sensor.

I have my concerns about that sensor and the library for it. I know it is a slow device to talk to (or maybe just slow updates, I forget). I wonder if there is any blocking code that might be causing you problems. I would disable the code for that sensor and then see if it is stable.

I have been using the weatherstation code as a base for one of my projects. viewtopic.php?f=11&t=15929

Posted: **Tue Feb 20, 2018 5:27 pm**

I'm having the same problem with Meraki after updating to the latest firmware.
After the device disconnects, it won't connect back until a few minutes later.

ESP8266 Community Forum

WiFi not staying up

WiFi not staying up

Re: WiFi not staying up

Re: WiFi not staying up