I just activated the SIM card and successfully used it to send and receive SMS using SIM800C and an Arduino.
However, I’m having issues with POST/GET HTTP requests.
Whenever I try to access a URL I either get a TIMEOUT or Error 601. Here’s what my AT commands and responses look like:
AT+CPIN? +CPIN: READY OK AT+SAPBR=3,1,"Contype","GPRS" OK AT+SAPBR=3,1,"APN","hologram" OK AT+SAPBR=1,1 OK AT+SAPBR=2,1 +SAPBR: 1,1,"10.52.125.104" OK AT+HTTPINIT OK AT+HTTPPARA="CID",1 OK AT+HTTPPARA="URL","hologram.io/test.html" OK AT+HTTPACTION=0 OK TIMEOUT AT+HTTPREAD ERROR AT+HTTPTERM ERROR AT+SAPBR=0,1 ERROR
And every once in a while I’d get
AT+HTTPACTION=0 OK +HTTPACTION:0,601,0
The timeout is set to 5sec and I’ve also tried with 50sec to no avail.
I’ve never gotten a response from the web server.
Any idea what might be wrong with it?