Simplify Communication
SIM7020 Series_SUB KIT_User Guide Page 7 / 13
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Module VBAT range is from 2.1V to 3.6V, typical is 3.3V recommended.
Module GPIO pins are at 1.8V logical level. Cannot be connected to external 3.0V or higher
level signals directly.
SIM7020C and SIM7020E module support CAT-NB1, SIM7020G module supports
CAT-NB1/C AT-NB2 (3GPP Release 14).
3 Installations and Communication
3.1 Driver installation
There are two USB jacks, one is USB to UART (position D), and the other one is USB (position F).
3.1.1 USB-to-UART interface driver installation
This USB-to-UART chipset on board is from Silicon labs.
Here is the driver link.
https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers
After driver installed properly and completely, there are two virtual USB ports, for example
COM24 and COM23 as below.
Interface Number SIM7020 UART Comments
Full mode for AT communication
Standard COM 23 UART2 No hardware flow control, for FW update
3.1.2 Module USB interface driver installation
SIM7020 Chipset is from MTK (MediaTek). SIMCom provide proper driver to developer, please
contact SIMCom Support Team.
After USB driver installed properly and completely, there will be 2 virtual ports, debug port and
modem port.
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