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hardware_setup.md

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GPIO PIN# FUNCTION - FUNCTION PIN# GPIO
0 1 TX0 VBUS 40 --
1 2 RX0 VSYS 39 --
-- 3 GND GND 38 --
2 4 3V3_EN 37 --
3 5 3V3 36 --
4 6 SDA0 ADC_VREF 35 --
5 7 SCL0 SW_FILESAVE 34 28
-- 8 GND GND 33 --
6 9 32 27
7 10 GPS_PPS_IN 31 26
8 11 TX1 RESET 30 --
9 12 RX1 29 22
-- 13 GND GND 28 --
10 14 GPS_Power 27 21
11 15 LCD_Power SD_Power 26 20
12 16 BN55_Reset SPI0:MOSI 25 19
13 17 LED_FWri SPI0:SCK 24 18
-- 18 GND GND 23 --
14 19 LED_Fault SPI0:CS 22 17
15 20 BN55_Power SPI0:MISO 21 16

GPS_Power / LCD_Power / SD_Power / BN55_Power = 3V3 to peripherals RX0 = Serial1 (MiniDL) RX1/TX1 = Serial2 (GPS) LED_FWri = file write indicator; active high LED_Fault = missed_packets_consecutive > 5; active high SW_FILESAVE = file saving enable; active low (LED directly tied to switch)

TODO: Fault indicator? DIP_FORMAT = JSON or CSV format LED_GPS = GPS lock indicator