Connecting Arduino to wunderground using ESP8266

Question

I'm trying to use an ESP8266 and Arduino Uno to connect to wunderground and get the JSON file to get the current weather. With my code I am connecting to the server fine. What seems to be the issue is that it's not giving me the whole return file.

#include <SoftwareSerial.h>
#include <ArduinoJson.h>

SoftwareSerial esp8266(8, 9);
bool flag = true;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  esp8266.begin(9600);
}

void loop() {
  if (flag) {
    String cmd;
    int length;
    cmd = "AT+CIPSTART=\"TCP\",\"";
    cmd += "api.wunderground.com";
    cmd += "\",80";
    esp8266.println(cmd);
    Serial.println(cmd);
    delay(2000);
    Serial.write(esp8266.read());
    if (esp8266.find("CONNECT")) {
      Serial.println("CONNECT found so your connected");
    }
    String action;
    action = "GET http://api.wunderground.com/api/APIKEY/conditions/q/Canada/Regina.json HTTP/1.0\r\n\r\n";
    length = action.length();
    cmd = "AT+CIPSEND=";
    cmd += length;
    esp8266.println(cmd);
    Serial.println(cmd);
    delay(5000);
    if (esp8266.find(">")) {
      Serial.print(">");
    } else {
      esp8266.println("AT+CIPCLOSE");
      Serial.println(F("connect timeout"));
    }

    esp8266.println(action);
    Serial.println(action);
    delay(700);

    String test = "";
    while (esp8266.available()) {
      char c = esp8266.read();
      test += c;
    }
    Serial.println(test);
    flag = false;
    Serial.println("Flag is false");
  }
}

Running this code give me the following result:

AT+CIPSTART="TCP","api.wunderground.com",80 ACONNECT found so your connected AT+CIPSEND=97 GET http://api.wunderground.com/api/7287eb3ace065563/conditions/q/Canada/Regina.json HTTP/1.0

busy s...

Recv 97 bytes

SEND OK

+IPD,1460:HTTP/1.0:"0.1", "termsofService":"http://www.wunderground.com/weather/api/d/terms.html", " Flag is false

As you can see I only get a snippet of the JSON file. I'm not sure what the problem is.

dda · Accepted Answer · 2016-04-17 06:27:35Z

1

It's not sending JSON at all. It detected that your Arduino/ESP combo was not a human, and is scolding you, letting you know that you are in breach of the Terms of Service, as described in http://www.wunderground.com/weather/api/d/terms.html. You need to set some headers, to masquerade as a browser and thus pass as a human user.

answered Apr 17, 2016 at 6:27

dda

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2 Comments

Tyler Foraie Over a year ago

After I asked this I came across something like what you mentioned someone had to set more headers. I will have to look into this a bit more. Are there particular headers that you know of that I would have to set?

dda Over a year ago

whatismybrowser.com/detect/… The one you want is USER_AGENT.

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