SIM808 Error 601 Network Error

Question

I am using the SIM808 module with a sim card on the Ting network. I keep getting the 601 error when trying to post data to a website. What am I doing wrong. The AT commands I am sending are below responses begin with >

AT+CREG?
>+CREG: 0,1
>OK
AT+CIPSHUT
>SHUT OK
AT+CGATT=1
>OK
AT+SAPBR=3,1,"CONTYPE","GPRS"
>OK
AT+SAPBR=3,1,"APN","wholesale"
>OK
AT+CSTT="wholesale"
>OK
AT+SAPBR=1,1
>OK
AT+CIICR
>OK
AT+SAPBR=2,1
>+SAPBR: 1,1,"162.168.167.120"
>OK

AT+HTTPINIT
>OK
AT+HTTPPARA="CID",1
>OK
AT+HTTPPARA="UA","SIMCom_MODULE"
>OK
AT+HTTPPARA="URL","http://posttestserver.com/post.php"
>OK
AT+HTTPPARA="REDIR",1
>OK
AT+HTTPSSL=1
>OK
AT+HTTPDATA=22, 10000
>DOWNLOAD
-->this is post data<--
>OK
AT+HTTPACTION=1
>OK
>+HTTPACTION: 1,601,0
AT+HTTPREAD
>OK

Answer 1

1:) sim should be activated for data. 2:) if apn has password and username they also should be passed before using

    at+sapbr=1,1

3:) if required before at+sapbr commands the first command try

    at+sapbr=0,1 
to de-activate bearer profile.

Answer 2

Working on a similar device, SIM868, on Vodafone Ireland network and I kept getting a 601 error returned when attempting comms with a development test server. I added a proxy server and port to the APN settings before sending data which returned 503 - service unavailable. Commands used:

• AT+HTTPPARA="PROIP","xxx.xxx.xxx.xxx"
• AT+HTTPPARA="PROPORT","xxxxx"

I put them after:

• AT+HTTPPARA="CID",1'
• AT+HTTPPARA="URL","http://xxx.xxx.xxx.xxx:xxxxx"

Some APN settings have different proxy servers/ports for different services depending on provider, e.g. GPRS, WAP, MMS, 3G, 4G

I have successfully comm'ed with httpbin.org using HTTP POST (as opposed to HTTPS, my chip doesn't support it) without the proxy settings included. Your code up until the HTTPACTION return looks good, pretty much the same layout I used to comm with httpbin.org.

Edit: SIM868 does support ssl, according to the supplier. Not sure what version

Not a fix but might get you or someone else a little closer to successful comms with these modems (documentation is a little sparse around certain topics)

Edit: Turned out to be a server side problem, didn't need the proxy settings. Added the AT command list which successfully talked to httpbin.org

AT
OK

AT+CMEE=2
OK

AT+CPIN?
+CPIN: READY

OK

AT+CREG?
+CREG: 0,1

OK

AT+CGATT?
+CGATT: 1

OK

AT+CSQ
+CSQ: 13,0

OK

AT+SAPBR=3,1,"Contype","GPRS"
OK

AT+SAPBR=3,1,"APN","live.vodafone.com"
OK

AT+SAPBR=1,1
OK

AT+SAPBR=2,1
+SAPBR: 1,1,"10.231.208.96"

OK

AT+HTTPINIT
OK

AT+HTTPPARA="CID",1
OK

AT+HTTPPARA="URL","http://httpbin.org/post"
OK

AT+HTTPDATA=16,10000
DOWNLOAD


OK

AT+HTTPACTION=1
OK

+HTTPACTION: 1,200,326

AT+HTTPREAD
+HTTPREAD: 326
{
  "args": {},
  "data": "SIM868 GPRS test",
  "files": {},
  "form": {},
  "headers": {
    "Accept": "*/*",
    "Connection": "close",
    "Content-Length": "16",
    "Host": "httpbin.org",
    "User-Agent": "SIMCOM_MODULE"
  },
  "json": null,
  "origin": "213.233.150.18",
  "url": "http://httpbin.org/post"
}

OK

AT+HTTPTERM
OK

AT+SAPBR=0,1