User's Manual

GSM/GPRS/GNSS Module Series
MC20 Hardware Design
MC20_Hardware_Design Confidential / Released 39 / 95
Figure 12: Turn on the Module with a Button
Command AT+QGNSSC=1 should be sent to enable the GNSS power supply after the GSM part is
running. When the GNSS_VCC is valid, the GNSS will enter into full on mode automatically. The turn-on
timing is illustrated in the following figure.
Figure 13: Turn-on Timing