1. I am interfacing SIM900A with MCU. Need to hit a http url (URL has data embedded into it, so I made it my code). This is to be repeated every 5 mins.
2. Here is initialization algo which I have written & implemented in C, this is done one time in code:
3.This is when I hit HTTP URL and read response, this is repeated in loop:
4. I have implemented in C with MCU and can see data hit on server which i can access
5. Is it right sequence or I am missing something in it? ANy code suggestion on it?
ANy missing command, or wrong timeouts?
2. Here is initialization algo which I have written & implemented in C, this is done one time in code:
Code:
1. send_command("AT" , "OK" , 5000);
If "Ok" not received or no response till 5000ms then send go to START,
else "OK" received then proceed
2. send_command("AT+CFUN=0" , "OK" , 5000);
If "Ok" not received or no response till 5000ms then send go to START
else "OK" received then proceed
3. send_command("AT+CFUN=1" , "OK" , 5000);
If "Ok" not received or no response till 5000ms then send go to START
else "OK" received then proceed
4. send_command("AT+CPIN?" , "READYOK" , 5000);
If "READYOK" not received or no response till 5000ms then send go to START
else "READYOK" received then proceed
5. send_command("AT+HTTPTERM" , "OK" or "ERROR" , 5000);
If no response for 5000ms then goto START
else if "OK" then proceed
else if "ERROR", then also proceed, it means that HTTP was terminated earlier also
6. send_command("AT+SAPBR=0,1" , "OK" or "ERROR" , 5000);
If no response for 5000ms then goto START
else if "OK" then proceed
else if "ERROR", then also proceed, it means that GPRS was terminated earlier
7. send_command("AT+SAPBR=3,1,"Contype","GPRS"" , "OK" , 5000);
If "OK" not received or no response till 5000ms then send goto START
else "OK" received then proceed
8. send_command("AT+SAPBR=3,1,"APN","airtelgprs.com"" , 5000);
If "OK" not received or no response till 5000ms then send goto START
else "OK" received then proceed
9. send_command("AT+SAPBR=1,1" , 5000);
If "OK" not received or no response till 5000ms then send goto START
else "OK" received then proceed
10. send_command("AT+SAPBR=2,1" , 5000);
If "OK" not received or no response till 5000ms then send goto START
else "OK" received then proceed
11. send_command("AT+HTTPINIT" , 5000);
If "OK" not received or no response till 5000ms then send goto START
else "OK" received then proceed
12. send_command("AT+HTTPPARA="CID",1" , 5000);
If "OK" not received or no response till 5000ms then send goto START
else "OK" received then proceed
3.This is when I hit HTTP URL and read response, this is repeated in loop:
Code:
1. send_command("AT+HTTPPARA="URL","http://xxxxx" , 5000);
If "OK" not received or no response till 5000ms then send goto HIT_HTTP_URL
else "OK" received then proceed
2. send_command("AT+HTTPACTION=0" , 5000);
If "OK" not received or no response till 5000ms then send goto HIT_HTTP_URL
else "OK" received then proceed
3. send_command("AT+HTTPREAD" , 5000);
If "XYZ" not received or no response till 5000ms then send goto HIT_HTTP_URL
else "XYZ" received then data success
//"XYZ" is response read from server on successfully hitting the server
4. I have implemented in C with MCU and can see data hit on server which i can access
5. Is it right sequence or I am missing something in it? ANy code suggestion on it?
ANy missing command, or wrong timeouts?