> Complete documentation index: [llms.txt](/llms.txt). Markdown versions of all pages are available by appending `.md` to page URLs.

# Bridge 1.1 API - UART Commands

### Set Voltage

See [#set-bus-voltage](/user-guide/protocols-and-interfaces/bridge-11-api/bridge-11-api-i2c-commands/#set-bus-voltage "mention").

### UART Initialization

*   **Command Request:**

    ```json
    {
      "transaction_id": "1",
      "command": "uart_init",
      "params": {
        "baudRate": "<600|1200|2400|4800|9600|14400|19200|38400|56000|57600|115200>",
        "hardwareHandShake": <Boolean>,
        "parity": "<0|1|2>",
        "dataSize": "<0|1>",
        "stopBit": "1"
      }
    }
    ```

    * **Field Descriptions**:
      * **`parity`**\
        Sets the UART parity mode:\
        `0` = No parity, `1` = Even parity, `2` = Odd parity.
      * **`dataSize`**\
        Defines the number of data bits per frame:\
        `0` = 7-bit, `1` = 8-bit.
      * **`stopBit`**\
        Selects the number of stop bits:\
        `0` = 1 stop bit, `1` = 2 stop bits.
* **Responses:**
  *   Immediate Promise Response:

      ```json
      {
        "transaction_id": "1",
        "status": "success",
        "type": "command_response",
        "is_promise": true,
        "data": {
          "command": "uart_init"
        }
      }
      ```
  *   Final Response:

      ```json
      {
        "transaction_id": "1",
        "status": "success",
        "type": "command_response",
        "is_promise": false,
        "data": {
          "is_response_to": "uart_init",
          "status": "success"
        }
      }
      ```

### UART Configuration

*   **Command Request:**

    ```json
    {
      "transaction_id": "1",
      "command": "uart_config",
      "params": {
        "baudRate": "<600|1200|2400|4800|9600|14400|19200|38400|56000|57600|115200>",
        "hardwareHandShake": <Boolean>,
        "parity": "<0|1|2>",
        "dataSize": "<0|1>",
        "stopBit": "1"
      }
    }
    ```

    * **Field Descriptions**:
      * **`parity`**\
        Sets the UART parity mode:\
        `0` = No parity, `1` = Even parity, `2` = Odd parity.
      * **`dataSize`**\
        Defines the number of data bits per frame:\
        `0` = 7-bit, `1` = 8-bit.
      * **`stopBit`**\
        Selects the number of stop bits:\
        `0` = 1 stop bit, `1` = 2 stop bits.
* **Responses:**
  *   Immediate Promise Response:

      ```json
      {
        "transaction_id": "1",
        "status": "success",
        "type": "command_response",
        "is_promise": true,
        "data": {
          "command": "uart_config"
        }
      }
      ```
  *   Final Response:

      ```json
      {
        "transaction_id": "1",
        "status": "success",
        "type": "command_response",
        "is_promise": false,
        "data": {
          "is_response_to": "uart_config",
          "status": "success"
        }
      }
      ```

### UART Send

*   **Command Request:**

    ```json
    {
      "transaction_id": "1",
      "command": "uart_send",
      "params": {
        "writeBuffer": "<Hex String (e.g. DEADBEEF)>"
      }
    }
    ```
* **Responses:**
  *   Immediate Promise Response:

      ```json
      {
        "transaction_id": "1",
        "status": "success",
        "type": "command_response",
        "is_promise": true,
        "data": {
          "command": "uart_send"
        }
      }
      ```
  *   Final Response:

      ```json
      {
        "transaction_id": "1",
        "status": "success",
        "type": "command_response",
        "is_promise": false,
        "data": {
          "is_response_to": "uart_send",
          "status": "success"
        }
      }
      ```

### UART Interruption Notification Message

```json
{
  "transaction_id": "0",
  "status": "success",
  "type": "notification",
  "is_promise": false,
  "data": {
    "type": "UART_MESSAGE_RECEIVED",
    "payload": <Array of 2-Byte Hex String (e.g. ["DE", "AD", "BE", "EF"])>,
    "payload_length": 4
  }
}
```