Module4
Voltage Regulator Current Limit Module 3.3V Out
Module3
Voltage Regulator SMPS 3.3V Out
Module9
LoRaWAN Module
Module7
Microphone Module
Module6
External Flash Module
U1
Module5
SD Card Module
Module2
Power Source Selector Module
Module1
Crystal Oscillator (12 MHz) Module
Module8
Temperature Sensor Module
QSPI_SS
SD_DATA1
SD_CLK
SD_DATA0
MIC_SCL
XIN
QSPI_SD0
SD_DATA3
MIC_WS
USB_D-
XOUT
LORA_RX
QSPI_SD3
QSPI_SS
QSPI_SD1
QSPI_SD2
SD_DATA2
MIC_SDA
QSPI_SCLK
MIC_SDA
USB_D+
SD_DATA1
SD_CMD
QSPI_SD0
DHT_DATA
LORA_NRST
LORA_RX
SD_CLK
XOUT
USB_D+
QSPI_SD3
LORA_TX
SD_DATA3
QSPI_SCLK
DHT_DATA
SD_DATA0
MIC_SCL
SD_DATA2
QSPI_SD1
SD_CMD
LORA_TX
XIN
QSPI_SD2
MIC_WS
LORA_NRST
USB_D-
3V3
VBAT
3V3
3V3
3V3
VSOLAR
VSOLAR
VIN
3V3
VUSB
3V3
1V1
1V1
VBAT
VIN
VIN
VBAT
1V1
VBAT
VUSB
3V3
3V3
3V3
3V3
C10
Capacitance
0.1µF
STORAGE & FLASH
C12
Capacitance
0.1µF
C13
Capacitance
0.1µF
POWER INPUT
POWER SELECTION
R7
Resistance
27.4 Ω
C6
Capacitance
0.1µF
C8
Capacitance
0.1µF
R15
Resistance
50 Ω
R8
Resistance
27.4 Ω
C2
Capacitance
0.1µF
INPUT CIRCUITS
OUTPUT CIRCUITS
MECHANICAL
SOLAR
J3
C4
Capacitance
0.1µF
C7
Capacitance
0.1µF
DECOUPLING CAPACITORS 1.1V
Line 1
Place as close as possible to the MCU 1.1V lines - DVDD and GND pins
C9
Capacitance
0.1µF
R19
Resistance
1.5kΩ
CONTROL CIRCUIT (MCU)
USB-
C11
Capacitance
0.1µF
BATTERY
MOUNTING HOLES
POWER REGULATION
C3
Capacitance
0.1µF
R16
Resistance
50 Ω
LED1
Color
Green
C1
Capacitance
1µF
C5
Capacitance
1µF
J1
J2
5_11 PCB Placement Updates
