This project is a digital multimeter simulator that communicates via standardized SCPI commands over a TCP/IP network. It generates a realistic discharge curve for a 12V AGM battery and allows users to "measure" this voltage through network queries, simulating a Keysight-style instrument.
Battery Discharge Simulation: Generates a voltage curve based on an exponential decay model for a standard 12V AGM battery.SCPI Server: Listens on port 5025 (the standard SCPI port) and processes incoming text commands via TCP.Data Visualization: Automatically plots the generated discharge curve using matplotlib upon startup.Sequential Measurement: Each voltage query (MEAS:VOLT?) returns the next data point in the pre-generated time series.
The project requires Python 3 and several libraries for mathematical calculations and plotting.Clone the repository:Bashgit clone https://github.com/your-username/multimeter-simulator.git cd multimeter-simulator
- Install dependencies:Bashpip install numpy matplotlib
Start the Server:Run the main script to initialize the data and start the listener:Bashpython main.py The program will first display a graph of the discharge curve.Once the graph window is closed, the SCPI server starts listening on 127.0.0.1:5025.Connecting to the Simulator:You can connect using any TCP client (e.g., Telnet, Putty, or a custom Python script).Example Interaction:PlaintextSent: *IDN? Response: LINDY TECHNOLOGIES,AABBCC,!!ONLY VOLTAGE MEASUREMENTS NOW!!
Sent: MEAS:VOLT? Response: 12.854... (current voltage value)
CommandDescription *IDN? Returns the device identification string.MEAS:VOLT?Returns the current simulated voltage measurement.MEAS:CURR?Returns an error message (current measurement not supported).MEAS:RES?Returns an error message (resistance measurement not supported).
-
main.py: The entry point that manages the TCP socket and coordinates between the generator and the SCPI parser.
-
generators/batt_dis_gen.py: Contains the AGM12VGeneric class for calculating the battery model using numpy
-
drivers/keysight_commands_module.py: Implements the KeysightGenericCommands class to parse SCPI strings and return appropriate responses.
You can modify the simulation behavior in batt_dis_gen.py by adjusting these parameters:
- chargedbattvolt: The starting voltage of the battery (default 13V)
- timeoffset: The total duration of the simulation in seconds (default 3600s)
- exponent: The rate of voltage decay.
This project is licensed under the MIT License: