# Pinout

### UART / I2C Port The module uses a 6-pin and 4-pin JST-GH connector following the Pixhawk standard.


Pin	Name	Direction	Description
1	5V	Input	Power input (regulated 5V)
2	RX	Input	UART RX (to GNSS module)
3	TX	Output	UART TX (from GNSS module)
4	SCL	Output	I²C Clock for BMM350 (3.3V logic)
5	SDA	Bidirectional	I²C Data for BMM350 (3.3V logic)
6	GND	—	Ground

### USB-TTL Port


Pin	Name	Direction	Description
1	5V	Input	Power input (regulated 5V)
2	RX	Input	UART RX (to GNSS module)
3	TX	Output	UART TX (from GNSS module)
4	GND	-	Ground

{% hint style="info" %} Please remove the UART/I2C connected device before plugging in the USB-TTL device. One device shall be connected at a given time. {% endhint %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://teravolt.gitbook.io/teravolt/gps/aeronav-1/pinout.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.