Communication Through Uart Interface; Firmware Update - SimCom SIM7020C User Manual

3.3.2 Communication through UART interface

SIM7020 UART communication supports auto baud rate, as well as other baud rates up to 3Mbps.
Here take Putty for example, configure serial port with COM24, 115200bps-8-1-N.
Interface Number
Enhanced COM 24
Standard COM 23

4 Firmware Update

1), Insert micro USB cable to USB jack (position D) and connect to the PC.
2), Open Windows flash tool
SIM7020 Series SUB Kit_User Guide
SIM7020 UART Comments
UART1 Full mode for AT communication
UART2 No hardware flow control, for FW upgrade
SIM7020 QDL V1.00 Only for Update
Simplify Communication
as show below.
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