# Connecting to a gateway

> How do I connect to a gateway

## Prerequisites

- Infuse-IoT Capable hardware with:

  - Serial or the programmer port.
- Python tools

## Device Logs

Connecting to a gateway uses the `infuse gateway` command. This command can be used over multiple backends.

- RTT
- Serial
- PyOCD

See [Gateways](/docs/infuse-iot-sdk/python-tools/gateways) for more details.

<tip>

Some boards have multiple interfaces that can be used for Text logs and ePacket data.
The selected interface can be viewed by searching the firmware's `devicetree_generated.h` for `epacket_serial` and finding the underlying device (e.g. `DT_N_S_epacket_serial_REQUIRES_ORDS`).

</tip>

<tabs>
<tabs-group icon="i-lucide-cpu" label="RTT">

- Note the name of the microcontroller you are connecting to. e.g. for the nRF52840 - `nRF52840_xxAA`.
- Connect your JLink programmer
- To connect to an `nRF52840_xxAA` board run:

```text
infuse gateway --rtt nRF52840_xxAA
```

or replace with your board name as required.

</tabs-group>

<tabs-group icon="i-lucide-usb" label="Serial (UART/USB)">

- Connect your device to your computer via serial/usb
- Note the name of the serial port your device is connected to.
- To connect to `/dev/ttyACM0` run:

```text
infuse gateway --serial /dev/ttyACM0
```

or replace with your serial port as required.

<tip>

Attaching and detaching the device will cause the serial device to appear and disappear.
Checking which ports are present in Device Manager (Windows) or `ls /dev/tty*` for macOS/Linux
can be a good way to identify which port to use if there are multiple options.

If multiple ports appear at the same time, it's typically the one with the smaller value.

</tip>
</tabs-group>

<tabs-group icon="i-simple-icons-python" label="PyOCD">

- Note the name of the microcontroller you are connecting to e.g. `stm32l451ceux`
- Connect your programmer
- To connect to a `stm32l451ceux` board run:

```text
infuse gateway --pyocd stm32l451ceux
```

or replace with your board name as required.

</tabs-group>
</tabs>

You should now be connected to the board, wait for data to appear in the terminal.
You can use commands from the Python Tools while the `infuse gateway` script is running.