Good afternoon,
I'm having problem to upgrade SIM800C module firmware as I'm using Linux and couldn't find any tutorial around that and I found mtkdownload tool
sim800_Series_update_tool_src_linux_v1.03.rar but it's command line help shows below
$ ./mtkdownload
Usage: mtkdownload <com> ROM_VIVA <format>
<com>: /dev/ttyS0,/dev/ttyS1,/dev/ttyS2..
means COM1,COM2,COM3,COM4,USB2COM
ROM_VIVA is updating rom file
<format> Y,N
means format FAT or not format Fat
Example: mtkdownload 100 ROM_VIVA Y
and Arduino port is /dev/ttyACM0 so I used
./mtkdownload /dev/ttyACM0 ./ROM_VIVA Y
and it always print same the above lines, What was wrong?
Also tried using /dev/ttyS0 as the port
$ ./mtkdownload /dev/ttyS0 ./ROM_VIVA Y
configure complete
start send and receive data
fcntl=0
isatty success!
fd-open=3
Filename : ./ROM_VIVA
Filesize : 2547000 bytes
len=2547000
Power On/Reset Target
notes: I don't use any extra modules to flash, just Arduino Uno connected to SIM800c (UART way if i'm not wrong) as below
Arduino --> Sim800c
5v --> VCC
GND --> GND
RX --> RX
TX --> TX
PDF Guide: https://simcom.ee/documents/SIM800x/SIM800%20Series_Software%20Upgrade_Application%20Note_V1.04.pdf
Thank you in advance