Unable to transfer data to ThingSpeak server using SIM800
Hi, I am using SIM800 for transferring data to the ThingSpeak server. After send OK, I am not getting acknowledgment from ThingSpeak. Also, the field is not getting updated in ThingSpeak. Let me know what has gone wrong. The commands and response in teraterm is as below.
AT+CIPSHUT
SHUT OK
AT
OK
AT+CIPMUX=0
OK
AT+CGATT=1
OK
AT+CSTT="airtelgprs.com","",""
OK
AT+CIICR
OK
AT+CIFSR
100.67.75.225
AT+CIPSTART="TCP","184.106.153.149","80"
OK
CONNECT OK
AT+CIPSEND
> GET /update?api_key=81XXXXXXXXXXXXX4&field1=32
SEND OK
CLOSED
3 Comments
Time Descending
Often the problem is the length of the send command after you build the URL. Can you share the part of your code where you determine the message length and send it?
Hi,
Thanks for the reply.
1) After AT+CIPSEND, I don't give the length of "GET /update?api_key=81XXXXXXXXXXXXX4&field1=32". Rather after "GET /update?api_key=81XXXXXXXXXXXXX4&field1=32" I give Ctrl+Z.
2) Here, I am using teraterm and I have connected SIM800 module to the serial port of my PC. I am sending the commands manually. Once, the concept works, I will write my code to do the same using microcontroller.
You might need to wait for a response from the server before disconnecting at the end.
