U2
U1
GPS_RX
VUSB
VBAT
3V3
SIM_RST
STM_RST
SWCLK
VBAT
VUSB
3V3
GPS_TX
SIM_TX
SIM_RX
SIM_RST
SCL
GPS_RX
3V3
3V3
3V3
SWCLK
3V3
SIM_TX
3V3
VBAT
VUSB
STM_RST
SDA
SWDIO
SWDIO
SDA
VBAT
SCL
GPS_TX
SIM_RX
P4
J1
J3
D1
U5
P3
U3
R7
Resistance
1KΩ
C3
Capacitance
4.7uF
R3
Resistance
22 Ω
L1
Inductance
22uH
C2
Capacitance
10uF
R8
Resistance
10KΩ
C1
Capacitance
10uF
C4
Capacitance
4.7uF
C5
Capacitance
1uF
R4
Resistance
5KΩ
R2
Resistance
1KΩ
J4
R6
Resistance
2KΩ
R5
Resistance
5KΩ
BT1
R1
Resistance
1KΩ
J2
LED2
LED1
U4
IC1