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U-blox module, Vin=12volt, RX (PIC18), RX, 3.3v to 5v - Coggle Diagram
U-blox module
Programming connector
RESET_N
SWD
Debug UART
RF switch
Chip Antenna
u.FL connector
UART RX/TX data
TX
PWM
3 color LEDs
NOR Flash
NFC
Switch button (Reset/enroll)
Vin=12volt
LDO
RX
PIC18
TX
RX
3.3v to 5v