GSM/GPRS/GNSS Module Series
MC90-TE-A User Guide
MC90-TE-A_User_Guide 14 / 21
5.2. Communicate with GSM Part of the Module
(1) If the main UART is used for communication with GSM part of MC90 module, please turn the S101
and S102 switch to
ON
state on MC90-TE-
A, and then connect the main UART of EVB to PC’s USB
port with the USB to UART converter cable. This is the recommended method. Switch status
description is available in the following figures.
Figure 6: S101/S102 Switch Status Indication
Figure 7: S101/S102 Switch Status on Main UART When Communicating with GSM Part
If the UART3 is used for communication with the GSM part, please turn the S101 switch to
OFF
and S102
switch to
ON
state on MC90-TE-A, and then connect the UART3 on EVB to
PC’s USB port with the USB
to UART converter cable. Currently, the software does not support this method.
