# Pins
## U-BLOX LEA-M8T-0-10 HUAWEI GPS Module
**Pins are 2mm pitch**
| Cable          | Module Pin | Module Pin Meaning | Pi Pin (Physical) | Pi Pin (Name) | Voltage     | Notes                          |
|:---------------|:-----------|:-------------------|:------------------|:------------------|:--------|:-------------------------------|
| Yellow         | 2          | Module Voltage In  | 17                | 3.3 Volts         | 3.3 V   | NOT 5 V TOLERANT               |
| Yellow  (Mark) | 1          | Antenna Voltage In | 2                 | 5 Volts           | 5 V     | 5 V ONLY                       |
| 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**
| 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 |