| Author |
Message |
sidhu_roy2005
Joined: 28 May 2008
Posts: 4
|
 01 Jul 2009 8:27 sim300s_v6 |
|
|
|
|
hi,
iam using SIM300S_V6.01 module,in that iam using serial port 1 all signals.iam trying to send AT commands to the module.but it is not sending any response to that particular commands.pls hep me regarding this issue.
|
|
| Back to top |
|
 |
GSM Man
Joined: 15 Apr 2009
Posts: 357
Helped: 46
Location: New Jersey, USA
|
01 Jul 2009 14:56 SIM300S_V6.01 |
|
|
|
|
| Can you provide more details on what you are sending? What platform (PC or microcontroller)? How do you know the module is receving the data - have you verified with a scope?
|
|
| Back to top |
|
|
sidhu_roy2005
Joined: 28 May 2008
Posts: 4
|
02 Jul 2009 10:29 Re: SIM300S_V6.01 |
|
|
|
|
the AT commands are sended through 16-bit uc via CPLD.iam sending the command only AT to GSM.this signal is seen through the scope.but iam not getting the response from the module.the pk-pk voltage is 3.3Vmax.in idle state the TXD signal is high(3.3V approx).SIM300 module supply is approx of 4.2V.
when i send Reset signal the module is turned on.this can be verified by SIM_CLK signal and SIM_VDD 2.9V generation.
help me regarding this issue.
|
|
| Back to top |
|
|
Google
AdSense
|
02 Jul 2009 10:29 Ads |
|
|
|
|
|
|
| Back to top |
|
|
GSM Man
Joined: 15 Apr 2009
Posts: 357
Helped: 46
Location: New Jersey, USA
|
02 Jul 2009 12:10 Re: SIM300S_V6.01 |
|
|
|
|
| sidhu_roy2005 wrote: |
iam sending the command only AT to GSM.
|
Are you sending a Carriage Return after the "AT"?
| sidhu_roy2005 wrote: |
when i send Reset signal the module is turned on.this can be verified by SIM_CLK signal and SIM_VDD 2.9V generation. |
When you say "Reset" signal, do you mean the "PWRKEY" pin? The "VDD_EXT " pin will go high when the module has powered-up. Also the "Network LED" pin should start toggling.
|
|
| Back to top |
|
|
