U2
GPS_RX
VBAT
3V3
SIM_RST
VUSB
GPS_TX
SIM_TX
SCL
GPS_RX
3V3
3V3
3V3
SWCLK
3V3
3V3
STM_RST
SDA
SWDIO
SDA
SCL
GPS_TX
SIM_RX
C3
Capacitance
4.7uF
R3
Resistance
22 Ω
L1
Inductance
22uH
R8
Resistance
10KΩ
D1
C5
Capacitance
1uF
R2
Resistance
1KΩ
R1
Resistance
1KΩ
U5
U3
BT1
LED1
J2
U4