The idea is to take Raspberry Pi, current/voltage meter INA219, and visualize the data by the web interface.
Built a simple circuit for testing. 4.7K resistor with known voltage
3.26V / 4700 Ohm = 7e-4 A = 0.7 mA
That what I see at the graph. So I can trust to measurements. Still some deviations here. Around 0.1 mA.
Measuring. X-axis is in milliseconds
Current going to negative values also. Very strange.
Python library for INA219
I will share my code soon
Using case and extension board from my old project. Extension board has i2c output. Connected INA219. Now it's time for coding