This is a Python library for the X-NUCLEO-LPM01A STM32 Power shield, Nucleo expansion board for power consumption measurement.
For more information about the X-NUCLEO-LPM01A communication protocol please refer to the UM2269 Getting started with PowerShield firmware
from src.LPM01A import LPM01A
lpm = LPM01A("/dev/ttyACM0", 3864000)
lpm.init_device(mode="ascii", voltage=3300, freq=5000, duration=0)
lpm.start_capture()
lpm.read_and_parse_data()See data_acquisition.py for a complete example.
from src.DataAnalysis import DataAnalysis
da = DataAnalysis("example.csv", 10_000, 30_000)
print(f"Average current consumption {da.calculate_average_current()} Ah")
da.plot_current_vs_timestamp()See data_analysis.py for a complete example.
# Calculates average current consumption between 3ms and 3.7ms and plots data
./data_analysis.py example.csv -s 3_000_000 -e 3_700_000 -p 
Both the data acquisition and data analysis scripts are limited to Unux-like systems, as the serial port is accessed through the /dev/ttyACM0 path.
Both scripts were tested on an Arch Linux and a Raspberry Pi 3B+ running Raspbian.
As this driver can work with ASCII mode only, the acquisition frequency of the LPM01A is limited to maximum of 50k samples / second.
This project is licensed under the MIT License - see the LICENSE file for details.