We are using Q26RD with Fw 7.44. The modem is connected to our main device through UART1. Its main functionality is to download (From server to the device) a unique file which size is about 1Mo / 1.5Mo. The trick is that, in this design, we have to use a « low » baudrate between the modem and our main device.
I did a test with this configuration:
- Developpment kit connected to a PC (HyperTerminal) trough UART1
- Baudrate on UART1 : 1200
- No OpenAT application
- Flux control : Not relevant (I’ve tried with and without)
- Downloaded file size : 1Mo
After a few bytes received (between 45Ko and 90Ko in my case) the modem resets. I don’t know why : Watchdog or internal buffer overflow ?
Same test with baudrate = 115200 runs perfectly.
Does anyone saw the same behavior? Is that a known bug?
How can I walk around? I’d may reduce the GPRS dataflow but I don’t know how to do so…
Thank’s for help.
Here’s a trace :
at+wipcfg=1 OK at+wipbr=1,6 OK at+wipbr=2,6,11,"my_apn" OK at+wipbr=2,6,0,"my_login" OK at+wipbr=2,6,1,"my_pwd" OK AT+WIPBR=2,6,12,1 OK at+wipbr=4,6,0 OK AT+WIPCREATE=2,1,"my_ip",my_port OK +WIPREADY: 2,1 at+wipdata=2,1,2 CONNECT <my_http_request> HTTP/1.1 200 OK Date: Thu, 28 Apr 2011 06:46:01 GMT Server: Apache Last-Modified: Fri, 24 Dec 2010 08:32:48 GMT ETag: "2000000009649-13d620-49823d4c9643d" Accept-Ranges: bytes Content-Length: 1300000 Connection: close Content-Type: text/plain /File content/ /Software reset/