PZEM-004T V3.0 (Raspberry Pi)

Official Write-up: www.piddlerintheroot.com/pzem...
PZEM-004T Datasheet: innovatorsguru.com/wp-content...
Required Parts:
CanaKit Raspberry Pi 4 4GB Starter Kit - amzn.to/2Jrlbfj
PZEM-004T Kit - amzn.to/3bQ7jqB
USB to TTL Converter - amzn.to/3nXrsxe
Wiring Harness [US Standard]
3-Wire Power Cord - amzn.to/3bR4y8v
Hinged Cord Outlet - amzn.to/3bOe1xd
Lamp Cord - amzn.to/3itZlox
Donate to the Channel:
/ piddlerintheroot

[@Nate88it]

I'm connecting a PZEM-004T to my off grid cabin power system. This was exactly what I needed!

[@troylhester]

Thanks for the video. I waas glad to see how to handle the raw data from the serial interface with Python. FYI an incandescent bulb may be a better load. Your soldering iron has a thermostatic switch that turns the power on and off depending on the temperature of the iron. So it will vary quite a bit. That's why the wattage changes from around 60w initially to much less later; probably the thermostat on the iron reached temperature and turned the current off. A dumb 60W incandescent bulb would be a bit more stable to do current and power testing.

[@ravissonsf]

Congrats! Well done!

[@jeffschroeder4805]

Perhaps the coil isn't sensitive enough for the low currents you were measuring-might try comparing results using something that would draw significantly more current?

[@arthurkepler483]

What kind of soldering iron pulls 14 watts? Might be much more interesting if it were turned on! Does it deactivate when holstered?

[@Raafiu4]

can I connect it to blynk for a GUI? And saving the data in a spreadsheet? or just view the data that is provided?

[@jayeshalagh1101]

GREAT CONTENT!!!!!!!!!!
LOVE YOUR WORK AND IT'S SO INSPIRING!!!
PLEASE MAKE A VIDEO EXPLAINING NRF24 WITH RASPBERRY PI!!!!!!
PLEASE!!!! I'M STUCK

[@MrBlackpanther87]

Any ideas on how to attach multiple PZEMs to the same serial? i Understand these are addressable but looking for some guidance. I have seen lots of ideas and code for esp boards but want to do it with a PI so that i can store data locally on the pi. I also plan to use the pi to read other meters in the distribution box, so will be convenient.
overall, i plan to read 6 Pzems, not sure if that brings any challenges and ideally from the same usb to serial. I am using 3 pzems with the esp board but the data is not reliable due to intermittent wifi issues etc.

[@arielgamboavazquez4250]

I believe you can, by using a modbus connection.

[@MrBlackpanther87]

@@arielgamboavazquez4250 thankyou, i figured it out eventually. Instead of coding it up i just went with nodered modbus integration

[@bra1nsen]

Could you make a Tutorial adding a solar panel to calc W/m2

[@samruddhipatil808]

Can I get flowchart for this program

[@ballrw61]

How to reset "energy_Wh" in python code.