SIM900 Customer Flash Loader

chipseller · May 11, 2012

Yes, you are correct. The standard firmware does not support DTMF detection or MMS commands, so you need to upload a version that does. It is posted above

aatheee said:
I just want to make sure I am getting this straight. I have an EVB and SIM900 modems. The Firmware that is pre-loaded is Revision:1137B11SIM900M64_ST.....Am I understanding correctly, that in order to access the MMS AT commands....I have to change the firmware? It currently spits out errors when I try to use any of the MMS commands.

Thanks in advance,
Amie

sherazi · May 20, 2012

1575B10SIM5215A.rar (16.35 MB)
SIM5320_SERVERSTART_ALREADY_LISTENGIN_KPRBL_2.rar (7.09 MB)

attached

devil6600 · Jun 10, 2012

hi chipseller
i am facing a very strange problem with sim900, when connected to gprs and a sms is received it crashes and restarts. if this happen three times then sim900 goes into a state where it does not respond to pwr key and at commands, after crash netlight starts to blink as if there was no sim card present. i have to manually disconnect sim900 supply and reconnect it to make it work again.

this issue is very frustrating as while connected to gprs service provider may send sms advertisement and sim900 will crash and restart.

i have two modules:
SIMCOM_Ltd
SIMCOM_SIM900
Revision:1137B10SIM900M64_ST

SIMCOM_Ltd
SIMCOM_SIM900
Revision:1137B08SIM900M64_ST

both of them have the same issue, any advice is highly appreciated
thanks

chipseller · Jun 11, 2012

Try updating the firmware. This may have been a known issue, I don't know. I have attached the latest version and release notes. All the tools and instructions are available in this thread

devil6600 · Jun 11, 2012

chipseller said:
Try updating the firmware. This may have been a known issue, I don't know. I have attached the latest version and release notes. All the tools and instructions are available in this thread

hi chipseller
i updated the module with the firmware you sent but still the problem exists, i also tried with this command: AT+SRSPT=1 but no success

can anyone having evb board confirm this issue, i feel this problem is because of sim900 firmware and not because of any fault in hardware design.
please if anyone having evb board confirm this:
1. connect module to gprs
2. and then send sms to module while connected to gprs
3. confirm if its crashing and resetting or not.

thanks

also is there a way to completely reject/disable sms feature?

Just.J · Jun 27, 2012

Hi chipseller!
Do you have access to sim900d firmware with DTMF? Like 1137B08SIM900D64_ST_DTMF_JD_MMS or B09. And could you share it plz?
Thaks in advance

chipseller · Jun 27, 2012

Hi All the frmware I have access to is already shared in this post. The 1137B08SIM900D64_ST_DTMF_JD_MMS is the only version I have and it is already posted here.

Just.J said:
Hi chipseller!
Do you have access to sim900d firmware with DTMF? Like 1137B08SIM900D64_ST_DTMF_JD_MMS or B09. And could you share it plz?
Thaks in advance

Just.J · Jun 27, 2012

Sorry, but I don't found it. Only 1137B08SIM900M64_ST_DTMF_JD_MMS from post #58 for sim900, but I need 1137B08SIM900D64_ST_DTMF_JD_MMS for sim900d.

crz_boy · Jun 27, 2012

hi...anybody have mms firmware for 1137B08sim900A32_ST ?

chipseller · Jun 27, 2012

As far as I know this firmware will work in the D and is the only one I have access to.

Sorry

Just.J said:
Sorry, but I don't found it. Only 1137B08SIM900M64_ST_DTMF_JD_MMS from post #58 for sim900, but I need 1137B08SIM900D64_ST_DTMF_JD_MMS for sim900d.

marc_m · Jul 1, 2012

Hi chipseller

Will the 1137B08SIM900M64_ST_DTMF_JD_MMS firmware update work on SIM900B?
I have successfully downloaded this update to my SIM900B but the module doesn't register to the network nor does it respond on hyper terminal.
Earlier i have tester the module it had 1137B08SIM900B32_ST firmware in it.

Thanks.

chipseller · Jul 1, 2012

Hi marc_m

It sounds like it probably doesnt. Reload the original software to restore the module. Here is the latest version I can get.

marc_m said:
Hi chipseller

Will the 1137B08SIM900M64_ST_DTMF_JD_MMS firmware update work on SIM900B?
I have successfully downloaded this update to my SIM900B but the module doesn't register to the network nor does it respond on hyper terminal.
Earlier i have tester the module it had 1137B08SIM900B32_ST firmware in it.

Thanks.

sahin5002 · Jul 1, 2012

Tested . work with SIM900D

chipseller said:
As far as I know this firmware will work in the D and is the only one I have access to.

Sorry

marc_m · Jul 2, 2012

Hi chipseller,

thanks for the updated firmware.

- - - Updated - - -

Hi chipseller,

thanks for the updated firmware.

sherazi · Jul 2, 2012

what does these strings mean _st etc

fnsnoop · Jul 2, 2012

behnam9856 said:
Hi guyz,

I have a sim900A GSM module! but it makes me crazy during updating the firmware!

for the first time, when i tried to update the firmware, i saw message 'Erasing flash, please wait' but after a while program alarmed timed out!

also before it netlight and status led were on!

now when i press power key down to start updating, when i hold it down for a while, i got this error:

View attachment 71818

when update starts and during filling progress bar i leave the button i got this error:

View attachment 71819

so what should i to do?
best regards

The same thing happened to me, my unit is completely unresponsive now, is it bricked?

LazBoy · Jul 2, 2012

Dear friends,

SIM900 is so problematic and so, I cancelled a project and send an email to
firm and there was no response up to now as expected.

My email is given below:

Code:

Dear Sir/Madam;

Unfortunately, we are throw away our project that used SIM900 Modem
due to defected products. 

Are your modems tested before release to delivery worldwide ?

Are your modems have detailed and also simplified (plug & play minimal needs) application data ?

Why we are having trouble to download test software, firmware updater, firmware files and application files ?

I decide to write this email to get a response to show how big are you.

behnam9856 · Jul 3, 2012

Sim900A is made for eastern asia!

so it just supports operators is easter asia!

One of my friends, set a mail to Sim company and they replied it!

china
india
singapor
malaysia
thailand
indonesia
cambodia
vietnam
laos
burma
brunei
philippines
east timor

when we upgrade it, we set our MCC code into sim900A, so we can use it... (I read it in some non-english forums!)

anyway, I could not upgrade it successfuly! so I decided to use Sim900

it works fine... also I used Sim908

Roshan · Jul 20, 2012

Hi chipseller,
New Firmware Releases in SIM900D or SIM900
Thanks

chipseller · Jul 23, 2012

These are the latest I have access to, some ar aleady posted. Check your current version is compatible before downloading a new version

- - - Updated - - -

These are the latest I have access to, some ar aleady posted. Check your current version is compatible before downloading a new version

SIM900 Customer Flash Loader

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