serial_query¶

Send a command string over a serial port and return the device response. Works with any serial-attached instrument that accepts text commands (e.g. SCPI). Independent of sigrok-cli.

Parameters¶

Parameter	Type	Required	Description
`port`	string	Yes	Serial device path (e.g. `/dev/ttyUSB0`)
`command`	string	Yes	Command to send (e.g. `*IDN?`, `MEAS:VOLT:DC?`)
`baudrate`	number	No	Baud rate (default: 9600)
`databits`	number	No	Data bits: 5, 6, 7, or 8 (default: 8)
`parity`	string	No	Parity: `none`, `odd`, `even`, `mark`, `space` (default: `none`)
`stopbits`	string	No	Stop bits: `1`, `1.5`, `2` (default: `1`)
`timeout_ms`	number	No	Read timeout in milliseconds (default: 1000)

Returns¶

The device response string.

Examples¶

Identify a device¶

Tool: serial_query
Parameters:
  port: /dev/ttyUSB0
  command: "*IDN?"
  baudrate: 115200
  timeout_ms: 3000

Read a voltage measurement¶

Tool: serial_query
Parameters:
  port: /dev/ttyUSB0
  command: "MEAS:VOLT:DC?"
  baudrate: 9600

Notes¶

This tool communicates directly over serial and does not use sigrok-cli.
Use get_device_profile to look up correct connection settings before querying an unknown device.
See device documentation for device-specific command references.