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I am using arduino UNO board, with modem sim800l. I want use it to send data to server, but the problem is that I receive 603 error when query parameters are supplied.

For

mySerial.println("AT+HTTPPARA=\"URL\",\"http://subdomain.domain.ro&val=1\"");

The response is a 603 error.

For 

mySerial.println("AT+HTTPPARA=\"URL\",\"http://subdomain.domain.ro/&val=1\"");

The response is a 404 page.

It works fine for just:

mySerial.println("AT+HTTPPARA=\"URL\",\"http://subdomain.domain.ro\"");

I validate all urls agains browser and they work just fine and the data is received.

The server is a NodeJS application behind a Nginx proxy set up only for http protocol with no redirect.

Cristina Lupu
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  • Have you tried to print the string you are sending? It seems like the `&` may be messing up your string to the SIM800L. – campescassiano May 05 '20 at 14:50
  • Have you tried escaping this & : `mySerial.println("AT+HTTPPARA=\"URL\",\"http://subdomain.domain.ro\&val=1\""); ` ? – Tom May 05 '20 at 14:50
  • Yes I printed it and it's ok, I tried in browser too the printed string and it works. Yes I tried to escape it and is the same. – Cristina Lupu May 05 '20 at 15:00
  • (Note that it not the same than in your second example) – Tom May 05 '20 at 15:01
  • mySerial.println("AT+HTTPPARA=URL, subdomain.domain.ro/?val=1&val2=2"); You can also try sending like this. – omfaer Sep 14 '20 at 18:09

1 Answers1

1

Solved

Need to escape both ? and & and use /

mySerial.println("AT+HTTPPARA=\"URL\",\"http://subdomain.domain.ro/\?val=1\&val2=2\"");
Cristina Lupu
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