pyvse

Python SDK for IFM VSE100 / VSA004 acceleration sensors. Reverse-engineered communication protocol. Not affiliated with or endorsed by IFM.

Install

pip install pyvse

Dependencies: numpy (required), pandas + matplotlib (optional, for export/visualization).

Quick start

One-shot collect

import pyvse

with pyvse.connect("192.168.0.1") as client:
    data = client.raw("50K").collect(seconds=5.0)
    data.to_csv("run1.csv")
    df = data.to_dataframe()   # pandas DataFrame: time_s, accel_g
    arr = data.to_numpy()      # np.ndarray shape (N,), unit: g

Live stream

import pyvse

with pyvse.connect("192.168.0.1") as client:
    for frame in client.raw("50K").stream(batch_size=700):
        print(frame.g_values.mean())   # np.ndarray shape (700,), unit: g

Stream to CSV (memory-efficient)

import pyvse

with pyvse.connect("192.168.0.1") as client:
    with pyvse.CSVSink("run1.csv", sample_rate=50_000) as sink:
        for frame in client.raw("50K").stream():
            sink.push(frame.g_values)

Stream to PlotJuggler

import pyvse

with pyvse.connect("192.168.0.1") as client:
    with pyvse.PlotJugglerSink() as pj:          # default: 127.0.0.1:9870 UDP
        for frame in client.raw("50K").stream():
            pj.push_all(frame.g_values)           # one UDP message per sample

API reference

pyvse.connect(host, port=3321, timeout=5.0) → VSEClient

Returns a context manager. Use with to ensure clean disconnect.

VSEClient

Method	Returns	Description
raw(rate="50K")	RawCommand	rate: "50K" or "100K"

RawCommand

Method	Returns	Description
collect(seconds)	RawData	Collect fixed-length capture
stream(batch_size=700)	Iterator[RawFrame]	Live stream; runs until interrupted

RawData

Attribute / Method	Description
g_values	np.ndarray shape (N,), float64, unit: g
sample_rate	int, Hz
time_axis	np.ndarray of timestamps in seconds
to_numpy()	Returns g_values
to_dataframe()	pandas DataFrame with columns time_s, accel_g
to_csv(path)	Write CSV with time_s, accel_g columns

RawFrame

Attribute	Description
g_values	np.ndarray shape (batch_size,), float64, unit: g
sample_rate	int, Hz

CSVSink(path, sample_rate)

Stream-friendly CSV writer. Use as context manager, call .push(g_values) per frame.

PlotJugglerSink(host="127.0.0.1", port=9870)

Pushes data to PlotJuggler via UDP JSON streamer.

Method	Description
push(g_values, channel="accel_g")	Send batch mean as single message
push_all(g_values, channel="accel_g")	Send each sample as individual message

Exceptions

Exception	Raised when
VSEConnectionError	TCP connect fails
VSETimeoutError	Socket read times out
VSEProtocolError	Unexpected response from device
VSEError	Base class for all pyvse errors

Disclaimer

Independent implementation developed through observation of device communication. Not affiliated with or endorsed by IFM.