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fs9721 1.0

Latest Version: 1.2.1

Easily gather measurements from your multimeter using the Fortune Semiconductors FS9721_LP3 protocol.


Install from Github directly:

git clone
cd python-fs9721
python install

or, install from PyPI using pip:

pip install fs9721

Use as a Library

Create the client you’ll use for gathering measurements first. Using the path to the serial device, create an instance of fs9721.Client:

from fs9721 import Client

my_multimeter = Client('/dev/tty.usbserial')

Then, you can gather measurements from your multimeter using:


Command-Line Use

Just run:

fs9721 /path/to/serial/port

For example, on my computer the device is connected via the serial port at /dev/tty.usbserial, for me to gather measurements directly from the multimeter, I would run:

fs9721 /dev/tty.usbserial

Does this support my multimeter?

This library should support any multimeter using the Fortune Semiconductors FS9721_LP3 chip. Common multimeters using this chip are often low-end and include the following:

  • TekPower TP4000ZC
  • UNI-T_UT60E
  • V&A V18b
  • Voltcraft VC-820 and VC-840

If your multimeter is not on the above list, do not despair! This specific IC is very common, and it may very use this chip. Sigrok has a nice reference of which chips various multimeters use; search for your multimeter on their wiki to see if yours also uses this DMM IC.

File Type Py Version Uploaded on Size
fs9721-1.0.tar.gz (md5) Source 2014-05-08 6KB