IO8
IO3
RESET
3.3V
IO14
IO11
IO2
TX
GND
R10
Resistance
220 Ω
IO22
IO1
IO5
SW1
IO13
R9
Resistance
220 Ω
D+
5V
R1
Resistance
10KΩ
D-
IO12
IO25
GND
R8
Resistance
220 Ω
IO10
RX
BOOT
R7
Resistance
10KΩ
IO0
IO4
C2
Capacitance
1uF
LED1
U1
End of Life
C5
Capacitance
22uF