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Precision-Timekeeping-Fuckery/Pins.md
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2025-10-29 18:15:04 -06:00

2.2 KiB

Pins

U-BLOX LEA-M8T-0-10 HUAWEI GPS Module

Pins are 2mm pitch 3.3 Volts

Cable Module Pin Module Pin Meaning Pi Pin (Physical) Pi Pin (Name) Voltage Notes
Yellow 2 Voltage In 17 3.3 Volts 3.3 V NOT 5 V TOLERANT
Black 8 Ground 6 GND 3.3 V? UNKNOWN 3 V AND 5 V TOLERANCES
White 6 Time Pulse 1/PPS 12 GPIO 18 3.3 V NOT 5 V TOLERANT
Blue 5 UART RX 8 UART TX / GPIO 14 3.3 V NOT 5 V TOLERANT
Green 3 UART TX 10 UARD RX / GPUI 15 3.3 V NOT 5 V TOLERANT

Adafruit DS3231 Precision RTC Breakout

Pins are 2.54mm pitch 3.3 Volts

Cable Module Pin (Physical) Module Pin (Name) Pi Pin (Physical) Pi Pin (Name) Voltage Notes
Red 1 Voltage In 1 3.3 Volts 3.3 V NOT 5V TOLERANT
Black 9 Ground 9 GND 3.3 V NOT 5V TOLERANT
Brown 3 SCL1 / I2C Clock 5 GPIO 4 / SCL1 3.3 V NOT 5V TOLERANT
Green 4 SDA1 / I2C Data 3 GPIO 2 / SDA1 3.3 V NOT 5V TOLERAGE

GPS

gps WORKING

yellow - 3.3v - pi physical #17 (3.3) black - gnd - pi physical #6 (gnd) white - pps - pi Physical #12 (gpio 18) blue - rx (module) to tx (pi) pi physical #8 (tx) green - tx (module) to rx (pi) pi physical #10 (rx) baud 9600

RTC

i2c rtc WORKING!

red - 3.3v - pi physical #1 (3.3) black - gnd - pi physical #9 (gnd) brown - scl - pi physical #5 (i2c clock) green - sda - pi physical #3 (i2c data)