MicroPython Forum (Archive)

Probably you should raise an issue against my library (https://github.com/chrisb2/pyb_ina219/issues) if believe its wrong, rarther that further discussion in this old topic in a deprecated forum.

Chris

Can you tell me where in the datasheet for the ina219 (https://www.ti.com/lit/ds/symlink/ina219.pdf) you saw 2.5uV? I see 10uV in the Electrical Characteristics table on page 5 where it say 10uV in the DC Accuracy section.

Chris

Based on the feedback I have updated my code to:

This comes from my own code, where the following function is part of a module which talks to a DS3231 RTC: def timestamp(): """Get current timezone date/time from RTC as DD-MM-YYYY HH24:MM:SS.""" dt = datetime() return '%02d-%02d-%d %02d:%02d:%02d' % \ (dt.day, dt.month, dt.year, dt.hour, dt.minute,...

I have some existing string formatting I tried to convert to an f string, but it would be longer than the pep8 line size limit, so I tried to use a multiline string (as per solution 1 of https://izziswift.com/multiline-f-string-in-python/ ) as follows: x = 1 y = 2 a = ( f"{x}" f"{y}" ) but this give...

Seems like one option would be Circuitpython which has a ina260 library see:

https://learn.adafruit.com/getting-star ... cuitpython

https://learn.adafruit.com/adafruit-ina ... cuitpython

Chris

I had a quick look at ina226 datasheet and it seems to me to be pretty similar to ina219, it might not be to hard to make appropriate changes to my library by carefully reading both data sheets. I would pay particular attention to the calibration algorithm. Micropython to Python should not be hard, ...

The battery is https://www.jaycar.co.nz/18650-lifepo4-battery-1600mah-3-2v/p/SB2307 . You need a charger specifically designed for LiFePO4 batteries, the ordinary LiPo chargers will generate too high a voltage they are full at 4.2V, whereas LiFePO4 are full at 3.65V. My charger is an https://www.ali...

I have had no problems with LiFePo4 batteries in this project: https://github.com/chrisb2/water-system Which uses a single directly connected battery. It wakes once a day and battery life seems to be about 3 months. The batteries I have have been recharged numerous times, even including recovering f...

Try schematic link here
https://wiki.wemos.cc/products:lolin32: ... umentation