SIM900 Customer Flash Loader

chipseller · Mar 4, 2014

I have some firmware files which are attached but no longer have the USB uploader.

Please note that I do not represent Simcom and I am unable to provide any technical information or assistance.

mic11 said:
Hi

I have bought development board based on SIM900, but program for SIM900 micro controller seems to have a lot of bugs and I can't finish my project based on this board (my project is SIM card tester based on arduino Duemilanove + SIM900 - but after changing one SIM card to another, SIM900 sometimes needs few restarts before SIM card can register to the network)
So i want to ask you for latest version of firmaware and loader for firmware for SIM900.
This is what AT+GSV command gives:

SIMCOM_Ltd
SIMCOM_SIM900
Revision:1137B01SIM900M64_ST_ENHANCE_Jablotron

mic11 · Mar 4, 2014

Hi

FW update doesn't solve my problem but SIM900 seems to work faster with new FW. Thank you very much for your help - this FW file is almost immposible to find.

majoka · Mar 6, 2014

can anyone provide me the latest firmware of sim900d
i am using this versions

SIMCOM_Ltd
SIMCOM_SIM900D
Revision:1137B09SIM900D64_ST

i am following SIM900_Email_AT Command Manual_V1.02 manual bit on each email AT command it give me a error
i think i need a firmware upgradation

Raghavendra M · Mar 14, 2014

Hi,
I have downloaded 1137B07SIM900A32_ST firmware but after upgrading in com port am receiving only IIIIIIIII like that what is the reason for that plz help me..

Thank you in advance.

www111 · Mar 18, 2014

Hi all,

I'm looking for the latest firmware for sim900 and flash tool.
Can some one pleas upload it?
Best regards.

zarkocgyu · Mar 22, 2014

Hi everyone!
I bought SIM900A https://www.aliexpress.com/item/SIM900A-GSM-GPRS-mobile-development-board-with-voice-interface-antenna/1618287088.html.
It is not been possible to register on the network (locked I guess).
I uploaded firmware "1137B11SIM900A32_ST.cla", and it will not power up again, serial connection is not working anymore.
Is there something I can do with it, or I must buy another one.

Thanks all.
Zarko.

jebin@ · Apr 9, 2014

Hi all,

I am testing HTTPS application on SIM900, but its firmware doesn't support HTTPS AT commands.

Could anyone provide the latest firmware version for supporting HTTPS stacks in sim900. From where can we download them. has anyone got https data transfer successful with sim900 modems?

Regards,
jebin

mroovka · May 13, 2014

Hello everyone,

Chipseller - could you please post the newest firmware for 900D?

Thanks in advance and best regards
Wojtek

sherazi · May 14, 2014

mroovka said:
Hello everyone,

Chipseller - could you please post the newest firmware for 900D?

Thanks in advance and best regards
Wojtek

I have shared the very latest firmware for SIM900 along with its Release Notes in this Post (1137B03SIM900M64_ST_ENHANCE)

- - - Updated - - -

majoka said:
can anyone provide me the latest firmware of sim900d
i am using this versions

SIMCOM_Ltd
SIMCOM_SIM900D
Revision:1137B09SIM900D64_ST

i am following SIM900_Email_AT Command Manual_V1.02 manual bit on each email AT command it give me a error
i think i need a firmware upgradation

For email use the Enhance version firmwares. I have made a collection of all firmwares I have on my blog . Check them!

- - - Updated - - -

mic11 said:
Hi

I have bought development board based on SIM900, but program for SIM900 micro controller seems to have a lot of bugs and I can't finish my project based on this board (my project is SIM card tester based on arduino Duemilanove + SIM900 - but after changing one SIM card to another, SIM900 sometimes needs few restarts before SIM card can register to the network)
So i want to ask you for latest version of firmaware and loader for firmware for SIM900.
This is what AT+GSV command gives:

SIMCOM_Ltd
SIMCOM_SIM900
Revision:1137B01SIM900M64_ST_ENHANCE_Jablotron

The latest version is 1137B03SIM900M64_ST_ENHANCE for SIM900

- - - Updated - - -

sherazi · May 15, 2014

mroovka said:
Hello everyone,

Chipseller - could you please post the newest firmware for 900D?

Thanks in advance and best regards
Wojtek

The latest firmware for sim900D is 1137B01SIM900D64_ST_ENHANCE.cla y

dineshswami · May 26, 2014

hello everyone
I am using SIM900A. I want to send email for that I am using SMTP protocol.But after AT+SMTPSEND command i get +SMTPSEND: 65 ,somtimes 61 and 63.
Plz help me.It is urgent.

cnd · May 29, 2014

- - - Updated - - -

teleko7 said:
Hello everybody

Iban

- - - Updated - - -

Hello Iban and Sherazi
I hope you are doing good with SIM908. This time I have noticed a very surprising thing from my SIM900. I have been working on it over year but never noticed that. I recently found that while flashing SIM900 core firmware, it is overwriting the IMEI# of module to some random different no. It occurs when you load the EAT-firmwares on a new module. Modules are very much working and connecting network, but all of them has same IMEI#, which is point of concern. We tried to reload general firmware to check if it get back the actual IMEI# printer on modules, but it is a negative. I also tried to load EAT firmware on a new SIM908 module to check if it overwrite the actual IMEI# and it did, the IEMI# got changed/overwrote by loading EAT firmware. Unfortunately I didn't find any solution to this issue till now. Also did not find any way to rewrite the IMEI#.

So check your devices or module if you noticed the same issue.

-CND

jesusangel · Jun 25, 2014

booker said:
For my SIM900A I use-1137B09SIM900B32_ST!!!
Works great with European networks!!!

Thank you very much you saved me many problems, the store in aliexpress sent me sim900A instead of SIM900. Even I killed one unit flashing it with 1137B09SIM900B32_ST, I didn't notice that my modules were 64_ST.

Regards

Kosh · Jun 26, 2014

cnd said:
- - - Updated - - -

- - - Updated - - -

Hello Iban and Sherazi
I hope you are doing good with SIM908. This time I have noticed a very surprising thing from my SIM900. I have been working on it over year but never noticed that. I recently found that while flashing SIM900 core firmware, it is overwriting the IMEI# of module to some random different no. It occurs when you load the EAT-firmwares on a new module. Modules are very much working and connecting network, but all of them has same IMEI#, which is point of concern. We tried to reload general firmware to check if it get back the actual IMEI# printer on modules, but it is a negative. I also tried to load EAT firmware on a new SIM908 module to check if it overwrite the actual IMEI# and it did, the IEMI# got changed/overwrote by loading EAT firmware. Unfortunately I didn't find any solution to this issue till now. Also did not find any way to rewrite the IMEI#.

So check your devices or module if you noticed the same issue.

-CND

Just use this command to reload the original IMEI:

AT+SIMEI="your imei"

pozzari · Jul 3, 2014

any sucess???
Any help for the comunnity??
Thanks a lot

patadino said:
Hi everybody,

Has anyone finally got work the SIM900 EAT or SIM908 EAT with GCC compiler instead RVCT2.2_616 version?.

If someone has had success making it, please post the procedure to make this working in GCC Compiler.

Regards,
Ignacio

cnd · Jul 10, 2014

Hello

Does any one has SIM900_AT Command Manual_V1.09.pdf and SIM900_Hardware Design_V2.05.pdf ?? Please share with community .

jesusangel · Jul 10, 2014

cnd said:
Hello

Does any one has SIM900_AT Command Manual_V1.09.pdf and SIM900_Hardware Design_V2.05.pdf ?? Please share with community .

Did you googled? you can find it in first link simcom.ee site.

**broken link removed**

Regards

cnd · Jul 10, 2014

jesusangel said:
Did you googled? you can find it in first link simcom.ee site.

**broken link removed**

Regards

YES I JUST FOUND IT FROM THE ABOVE LINK AFTER POSTING HERE. THANKS ANYWAYS :smile:

- - - Updated - - -

Kosh said:
Just use this command to reload the original IMEI:

AT+SIMEI="your imei"

Thank you Kosh, you have just helped me to solve a months long issue. I have used this AT command before, but my syntax was wrong. It is very important to put 15 digit IMEI # in double quote, i.e "IMEI#" SIM900 Module. I will check with SIM900A module later.

.

jv04 · Jul 23, 2014

Hi!!
I'm getting this error (see image) while downloading the fw to a SIM900

I'm using an Arduino Nano to send the fw, directly connected to the Tx and Rx of SIM900 Shield as some tutorials over the internet say, but no success...
Any help??

Leopard77 · Aug 21, 2014

Hi, I'm trying to update the Firmware of a SIM900 and I get the following error message.

Does anybody has an idea of what could be wrong ?

Thanks

SIM900 Customer Flash Loader

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