> For the complete documentation index, see [llms.txt](https://teravolt.gitbook.io/teravolt/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://teravolt.gitbook.io/teravolt/gps/aeronav-pro-rtk/pinout.md).

# Pinout

<figure><img src="/files/u6UzuP4uZqTDTQBKKMrk" alt=""><figcaption></figcaption></figure>

## UART1 Port

| 1 | VCC | Power input (+5.0V) |
| - | --- | ------------------- |
| 2 | RX  | Module UART1-RX     |
| 3 | TX  | Module UART1-TX     |
| 4 | GND | Ground              |

## UART2 Port

| 1 | 3.3v\_SB | Power Out (+3.3V) |
| - | -------- | ----------------- |
| 2 | RX       | Module UART2-RX   |
| 3 | TX       | Module UART2-TX   |
| 4 | GND      | Ground            |

## I2C Port

| 1 | VCC | Power input/output (+5.0V) |
| - | --- | -------------------------- |
| 2 | SCL | Module SCL                 |
| 3 | SDA | Module SDA                 |
| 4 | GND | Ground                     |