Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Sorry richdavies, I cannot even find the old version through my normal access channels, nor is it in my list of uploaded files. I think this was a special version that came through a different source
This is the only 5128A firmware version I can find. I do not know if it is correct for you. Please check your existing version and satisfy yourself that it is correct before applying it. Nor can I tell if it will help you or not
The firmware posted above is the latest I can find. As far as I know (which isn't very much) EAT is always supported and there is no special firmware version to support it, but I know nothing of multi-tasking support
Attached are the Dev IDE 1.07, which is the only version I can find and an old...
I can only find formware for the sim5320AD. I do not know if this is compatible or not. The file name is 1575B11SIM5320AD.rar. If this is correct for you let me know and I will make it available here.
I do not have access to Windows drivers. I assume the serial port drivers are built into...
As far as I can see you have the latest version. Attached is the AT Command set document. Maybe the particular command is not supported?
Please note that I have nothing to do with Simcom and do not represent them in any way - I am just another engineer trying to help out where I can
Here is the latest version of sim900 ST firmware to which I have access. EAT functionality is not, I believe a function of the firmware itself, but is delivered through SIM900Dev_IDE and RVCT2.2, neither of which I have access to at the moment, but may be available elsewhere.
Please note that I...
The speed setting of 115200, which is the default speed in the flashloader tool is the only one I ever got to work reliably, whatever the module baud rate is.
See also my comments above about the power switch input
You have to make sure that the pwrkey is shorted to ground throughout the entirety of the update process. I can't say for sure but this looks similar to the errors I used to get when I released the pwrkey too early (it was a long time ago).