Python tool to interactively control a Hanmatek bench power supply based on the minimalmodbus Python library.
For a library version, see below.
Install the minimalmodbus library by running pip -r requirements.txt.
On Linux you may also need to grant user permission to the serial interface.
To do this, add the group "dailup" to your linux user account and restart your shell.
Execute python HanmatekCmd.py
You can either specify the serial port by appending --port COM5 or --port /dev/ttyUSB0, or after starting the shell by typing port COM5 or port /dev/ttyUSB0. This change is not persistent though
h or ? display this help text
ports list available serial ports
port change serial port
t toggle power
sv <float> set voltage to <float>
sc <float> set current to <float>
r read and display current status
+[++] / -[--] increase or decrease voltage
q or x exit
When pressing enter on empty input, the previous command will be repeated. This makes it easy to step the voltage up or down incrementally.
Voltage and current can also be input directly by postfixing the input value with "a" for ampere and "v" for volt, e.g. 4.2v.
The increment and decrement commands support an optional multiplier, e.g. ++4 increases the voltage by 0.4V.
- Running the script:
python HanmatekCmd.py --port COM5 - Setting voltage to 3.3 V:
sv 3.3 - Setting current limiter to 0.2 A:
sc 0.2 - Turn on the power:
t - Increase voltage by 1V:
+++ - Decrease voltage by 0.1V:
-- - Display current status:
r - Quit the script:
q
Python library to programmatically control a Hanmatek bench power supply
h = HanmatekControl(port)
# set 5v, 1.2a
h.set_voltage(5)
h.set_current(1.2)
h.set_power(True)
# display ratio between drawn current and maximum current
h.print_amp_meter()
v = h.get_voltage()More examples can be found inside the examples/ folder.
An example (DeviceControlTest.robot) for this library using the Robot Framework is also included. To use it, use the example below after installing the robotframework library.
pip install robotframework
robot DeviceControlTest.robot