siglent-spd-mcp

MCP server for Siglent SPD Series Power Supplies (SPD3303X, SPD3303X-E, SPD1168X, etc.).

Exposes voltage/current control, measurement, monitoring, timer, and system configuration as Model Context Protocol tools over SCPI/TCP.

Installation

pip install siglent-spd-mcp

Configuration

The server connects to the power supply via TCP/SCPI. Set the host and port with environment variables:

Variable	Default	Description
SPD_HOST	(required)	IP address of the power supply
SPD_PORT	5025	SCPI TCP port

Permissions (default: readonly)

All channels default to read-only. Set to readwrite to allow control:

Variable	Values	Description
CH1_PERM	readonly / readwrite	Channel 1 write access
CH2_PERM	readonly / readwrite	Channel 2 write access
CH3_PERM	readonly / readwrite	Channel 3 write access
NETWORK_PERM	readonly / readwrite	Network config write access
MEMORY_PERM	readonly / readwrite	Save/recall write access

Safety limits (optional)

Set per-channel voltage and current limits to prevent accidental damage:

Variable	Example	Description
CH1_MAX_VOLTAGE	5.0	Max voltage for CH1 (V)
CH1_MAX_CURRENT	1.0	Max current for CH1 (A)
CH2_MAX_VOLTAGE	32.0	Max voltage for CH2 (V)
CH2_MAX_CURRENT	3.2	Max current for CH2 (A)

Usage

Claude Desktop / Claude Code

Add to your MCP client configuration:

{
  "mcpServers": {
    "siglent-spd": {
      "command": "siglent-spd-mcp",
      "env": {
        "SPD_HOST": "192.168.1.100",
        "CH1_PERM": "readwrite",
        "CH1_MAX_VOLTAGE": "5.0",
        "CH1_MAX_CURRENT": "1.0"
      }
    }
  }
}

Direct execution

# Via entry point
siglent-spd-mcp

# Via module
python -m siglent_spd_mcp

Tools

Identification

• identify - Query instrument ID (manufacturer, model, serial, firmware)

Measurement

• measure_voltage - Measure actual output voltage
• measure_current - Measure actual output current
• measure_power - Measure actual output power
• measure_all - Measure voltage, current, and power in one call

Control

• set_voltage - Set voltage setpoint
• get_voltage - Query voltage setpoint
• set_current - Set current limit
• get_current - Query current setpoint
• set_output - Turn channel output on/off
• set_tracking_mode - Set tracking mode (independent/series/parallel)

Monitoring

• monitor - Measure for a fixed duration, return time-series data
• start_monitor - Start continuous background measurement
• stop_monitor - Stop background monitor and return collected data
• get_monitor_data - Peek at data from a running monitor

Timer

• set_timer - Configure timer group parameters
• get_timer - Query timer group parameters
• set_timer_state - Enable/disable timer function

System

• get_system_status - Query decoded system status flags
• get_error - Query error code
• get_version - Query software version
• get_safety_config - Show configured permissions and safety limits

Save/Recall

• save_state - Save instrument state to nonvolatile memory
• recall_state - Recall instrument state (with safety limit checks)

Network

• set_ip / get_ip - Static IP address
• set_mask / get_mask - Subnet mask
• set_gateway / get_gateway - Gateway address
• set_dhcp / get_dhcp - DHCP enable/disable

Display

• set_waveform_display - Toggle waveform display per channel

License

GPLv3+