SIM900 error 601 when sending a second POST

Question

Using SIM 900 :

AT+HTTPINIT

AT+HTTPPARA="CID",1

AT+HTTPPARA="URL","www.onewebsite.fr"

AT+HTTPDATA=lengthofpostdata, 10000

sending data

AT+HTTPACTION=1

AT_HTTPREAD=0, lengthofreceiveddata

Up to that point everything works OK

Then i send a new request :

AT+HTTPPARA="CID",1

AT+HTTPPARA="URL","www.onewebsite.fr"

AT+HTTPDATA=lengthofpostdata, 10000

sending data

AT+HTTPACTION=1

Then I received the message : +HTTPACTION=1,601,0

Any idea ?

possible duplicate of [error +HTTPACTION:0,601,0](http://stackoverflow.com/questions/15975051/error-httpaction0-601-0) — Burhan Khalid, Aug 09 '15 at 15:07
Not a duplicate, because setting up of connection bearer was already done (even if not described here) and because the first transaction (POST) worked successfully. The concern if for the second POST request. — rene, Aug 09 '15 at 19:08
I send commands repeatedly with the following set (I don't send the CID again): HTTPPARA=URL, HTTPACTION=0 (http get instead of post), HTTPREAD. This generally works, but sometimes I get a 60x error. I'm thinking of upgrading the firmware... — erict, Apr 09 '16 at 23:47

dmSherazi · Answer 1 · 2019-12-26T08:25:52.873

4

601 is some custom implemented Error code, as an example

This is a "magic" status code that we use to signal that something wrong happened with the request that was so bad that we didn't even got a response back from the server. In this case the request timed out (more than 30 seconds to return any bytes).

source

Here is the list of standard HTTP Status codes

At times you would get this error if you are sending requests too often as well! try to increase the delay between the two requests!

. +HTTPACTION:0,601,0

The above AT response code (601) for HTTP session start indicates that there is a network error. Then make sure that the PDP context is setup properly.

source

edited Dec 26 '19 at 08:25

answered Aug 10 '15 at 09:12

dmSherazi

3,743
5
37
62

What are you quoting there? – Ross Presser Dec 20 '19 at 17:44
1

I answered it long back and forgot to put the source . I found it and updated the answer as well – dmSherazi Dec 26 '19 at 08:24

score 1 · Answer 2 · edited Nov 23 '17 at 17:03

1

I faced this problem and the solution is to open the bearer again before the second request. Use

AT+SAPBR=1,1https://stackoverflow.com/questions

edited Nov 23 '17 at 17:03

clemens

16,716
11
50
65

answered Nov 23 '17 at 16:39

user2115205

11
1

score 0 · Answer 3 · edited Sep 20 '19 at 08:41

0

Some steps I have found to work:

Use the Adafruit FONA library if possible
Before every HTTP request check whether GPRS is enabled
If GPRS is enabled, check whether you have been assigned an IP Address
If 2 and 3 are true, proceed to make the HTTP request. If not, try to reconnect to GPRS until 2 and 3 are true

edited Sep 20 '19 at 08:41

RobC

22,977
20
73
80

answered Sep 20 '19 at 08:19

Karanja Mutahi

25
1
1
7

SIM900 error 601 when sending a second POST

3 Answers3