# UART

The UART connector is used to connect the node to B2 server or S2GW when the node is used as a PC node.

In case of a measuring S2 node, it is used as an interface to S2 S2IOG2 module, incubators and some other sensor types handled by the S2 family. The details can be found in [S2 node types](/s2-radio-system-manual/s2-system-description/s2-node/s2-node-types.md).

## UART settings

| Parameter  | Value |
| ---------- | ----- |
| Bit rate:  | 9600  |
| Data bits: | 8     |
| Stop bit:  | 1     |
| Parity:    | Even  |

##  Connector

The connector type is modular socket 4/4.

<figure><img src="/files/bQzIGtux0Cqdvu8IhEaP" alt="" width="197"><figcaption></figcaption></figure>

| Pin number | Signal              |
| ---------- | ------------------- |
| 1          | GND                 |
| 2          | RXD, RS-232C levels |
| 3          | TXD, RS-232C levels |
| 4          | GND                 |


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