(2) Click “Start Download”, and then switch the “POWER” key to ON (power on the module)įrom This Note I guess that 'Download key' is connected to PWRKEY Pin. If you do not have this download key of your own developed board, pull the power key low (to GND) all the time during downloading. In 'SIM800H_Standard_FW_Download Tool_V1 03' is wrote : it is some days that i am trying to upgrade it but not successful.Īnd it is wroten 'click ‘Start All’ button' but in all software upgrade tool that I found, I did'nt see same button. But i don't know S102(Download switch) is connected to witch PIN of SIM808.
In 'SIM808_EVB KIT_User Guide_V1.00', in part 'Upgrade module’s firmware through UART port', it is wrote : 'Switch S105 and S102 to ‘On’ state'. I made my SIM808 Evaluation board and i want to upgrade the module firm ware from UART.
