HTTP request, returns 'garbage'. about esp8266wifi HOT 7 CLOSED

Hi Sander,
I my self don't use http and utf-8 encoding as in your case. A tip could be to ask (in the http request) apache to respond in ascii only.

If that does not help it could be an hardware thing ie esp8266 3.3v and arduino maybe 5v?

Please let me know how it goes!
God luck!
/ Jonas

3 maj 2015 kl. 18:38 skrev Sander van Kasteel [email protected]:

I do not know, if it's an serious issue (or it's just my fault ;) ). But I am having some "trouble" with this Arduino library.

Currently I am using the ESP8266 as connection method to a local server, running Apache. The HTTP response I get back from my determines if a connected LED is turned off or on. Based on the "true" or "false" HTTP response.

The problem I am having is that the HTTP response I am getting isn't complete and garbled. The code I am using to send the HTTP request is as followed:

String location = "/home-automation/status.php?action=get&light=kitchen"; // Location where to fetch the new Status
String cmd = "GET " + location + " HTTP/1.1\r\n"; // complete HTTP request
cmd += "Host: 10.13.37.153\n";

wifi.connectToServer("10.13.37.153", "80");
if (wifi.isConnectedToServer())
{
Serial.println("I am connected to the server");

wifi.send(SERVER, cmd);

WifiMessage in = wifi.listenForIncomingMessage(2000);
if (in.hasData)
{
  Serial.print("Response: ");
  Serial.println(in.message);

}
I already changed the msgIn[] value to a value of 500, that does increase the amount of char's I get back, but still doesn't un-garble the return data.

OUTPUT with debugging

IPD,HTTP/1.1 ��2����0����0��� OK
Date: Sun, 03 May 2015 16:18:59 GMT
Server: Apache/2.4.10 (Debian)
Content-Length: 5
Content-Type: text/plain;charset=UTF-8

false
Output without debugging

HTTP�/1.1� 20�0 OK�
Da�te: �Sun�, 03� May� 20�15 1�6:27�:09 �GMT�
Se�rver�: Ap�ach�e/2.�4.10� (D�ebian�)
�Cont�ent-�Leng�th:� 5
�Cont�ent�-Typ�e: t�
Expected output

HTTP/1.1 200 OK
Date: Sun, 03 May 2015 16:18:59 GMT
Server: Apache/2.4.10 (Debian)
Content-Length: 5
Content-Type: text/plain;charset=UTF-8

false
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I haven't tried the "Accept-Charset" request field yet, so I am gonna try that.

But the ESP8266 is running on main voltage supply is 3.3v and the communication to the RX pin on the ESP8266 is being scaled down to 3.3v due to using an 74HC4050.

from esp8266wifi.

I hope Accept-Charset works. A tip is to use an app like SocketTest http://sockettest.sourceforge.net http://sockettest.sourceforge.net/ for debugging network issues. It lets you set up a tcp server and interact with the client.

I also used logic levels converters when I fist got my ESP8266, but now days I connect the esp and 5v Arduino directly. The logic levels are not harmful as long as the ESP8266 gets a 3.3v supply. Try it on your own risk of course :)

God luck!

7 maj 2015 kl. 21:37 skrev Sander van Kasteel [email protected]:

I haven't tried the "Accept-Charset" request field yet, so I am gonna try that.

But the ESP8266 is running on main voltage supply is 3.3v and the communication to the RX pin on the ESP8266 is being scaled down to 3.3v due to using an 74HC4050.

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I tried to send a POST request, but it is not successful.
Is that supported in this library?

from esp8266wifi.

How was it unsuccessful? Can you post the request and answer? Otherwise I cannot help you.
My guess is that it’s charset related. If your web server responds in UTF-8 or some other charset than ASCII-7 you’ll need to find some utf-8 lib for arduino..

/ Jonas

15 maj 2015 kl. 06:47 skrev ocb00999 [email protected]:

I tried to send a POST request, but it is not successful.
Is that supported in this library?

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The post request is somthing like this
POST /sensor HTTP/1.1
X-Parse-REST-API-Key: supersecretapikey
Content-Type: application/json
Host: homesensor.parseapp.com
Content-Length: 40

{"identifier":"dishwasher","state":true}

And for the arduino code I sent is lik this
cmd = "POST /sensor HTTP/1.1 \r\n";
cmd += "X-Parse-REST-API-Key: supersecretapikey\r\n";
cmd += "Content-Type: appliation/json\r\n";
cmd += "Host: homesensor.parseapp.com\r\n";
cmd += "Content-Length: 40\r\n\r\n";
cmd += "{"identifier":"dishwasher","state":true}\r\n";
wifi.send(SERVER,cmd)

By the way, is your library based on AT command?

from esp8266wifi.

Hi,
I think I know the problem is. By default the output buffer is limited to 25 characters. Your payload is a lot bigger :)

You’ll have to modify ESP8266wifi.h, see

Advanced configuration on https://github.com/ekstrand/ESP8266wifi https://github.com/ekstrand/ESP8266wifi

And yes, It’s based on AT commands :)

15 maj 2015 kl. 10:49 skrev ocb00999 [email protected]:

The post request is somthing like this
POST /sensor HTTP/1.1
X-Parse-REST-API-Key: supersecretapikey
Content-Type: application/json
Host: homesensor.parseapp.com
Content-Length: 40

{"identifier":"dishwasher","state":true}

And for the arduino code I sent is lik this
cmd = "POST /sensor HTTP/1.1 \r\n";
cmd += "X-Parse-REST-API-Key: supersecretapikey\r\n";
cmd += "Content-Type: appliation/json\r\n";
cmd += "Host: homesensor.parseapp.com\r\n";
cmd += "Content-Length: 40\r\n\r\n";
cmd += "{"identifier":"dishwasher","state":true}\r\n";
wifi.send(SERVER,cmd)

By the way, is your library based on AT command?

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