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ah nice one! yeah it helped a good bit, the big thing was knowing when power is being consumed but we need to optimize a few things which is the tough bit tbh! It has had its fair share of troubles though as the esp32 can have difficulty communicating with multiple modules. I recently tweaked the housing and added am going to dig into the code a bit more to see whats happening. I might make a video if I get it all working together , down the line I'd like to maybe start adding some sort of analysis on the power (for e.g power factor and current draw) to figure out which appliance is running at what time but at this point thats mainly a pipe dream!

I use home assistant! so I flash the esp32 with the home assistant code then I'm able to access it via over the air (OTA) updates :)

Hx711 and a load cell!

I've found they can be a bit temperamental, to set them up with the various addresses I used an Arduino and then for the final implementation I used esphome (which isn't really coding tbh) on the video I posted after this I have a like to the GitHub with my old config file for esphome. Weirdly I found that when multiple modules are connected they can conflict with one another sometimes when esphome is used. Took a while to find that out, not sure exactly what causes it but maybe try removing 1 at a time and see if you can get multiple to work? The Arduino doesn't seem to have this problem

@@fionnoch9867 Thanks for the answer. Can I get the Arduino code? Maybe I can adapt it to nodemcu.

The next video has a link to some example code!

In the next video I have a bit more detail!

So I think in this config I had everything connected to the same circuit. So like the main line into the house and then 3 breakers that were attached to that. I presumed it wouldn't make a difference as they'd all be the same voltage, frequency etc. In a later revision I was monitoring across different phases (at home we have 3 phase power) so for that one each devices live connection was connected to the breaker it was reading from but I did daisy chain the neutral to avoid on the amount of wires and mess in the board. Just something I noticed is that you can't daisy chain neutrals if one of the fuses is an rcbo (I think, it's a breaker type that requires a L and N) as it will trip the breaker

sure thing, I used these myself so can guarantee they work, you can get them on aliexpress for cheaper but you'll have to wait. Another thing is make sure you have a half decent crimper. the ferrule things are small enough on these www.amazon.co.uk/Litorange-500PCS-Housing-Adapter-Connector/dp/B086W9HB3M/ref=sr_1_5?keywords=jst%2Bconnectors&qid=1692049849&sprefix=jst%2Caps%2C74&sr=8-5&th=1

I'm still hoping to do a part 3 on this, changed up the config slightly and also realized I made a mistake in the video, if you're wiring up you want to connect rx on the arduino to tx on the PZEM and vice versa. annoyingly its not rx to rx and tx to tx like I thought.

@@fionnoch9867 Thanks for link... any chance I could twist your arm to make up and sell me 5 of them?! 🙏

@@rossicullen the JST connectors or the PZEMs? I can make up JST connectors or pre connected if you'd like but they might end up coming the same as ones online but they'll have a very DIY esthetic 😅

Just the JST connectors with a bit of wire on them plz :-) think my last comment got deleted

Correct, if you have more than 1 module you need to declare the addresses on the pzem's directly otherwise they will conflict. An Arduino can do this

@@fionnoch9867 Friend, could you give me the complete code that you did, thank you very much

@@TallerSalvatoreJimeno if you look at the part 2 video I have a link to a my github with example code for the ESPHome config. The Arduino address assigning bit you can use the example code for the PZEM to do that, I'd recommend using a software serial connection rather than a hardware serial and set the baud rate to 9600

yeah so you'd need a voltage converter if you're powering it directly from the esp32, some esp32s have a 5v output but not all, its worth checking if you do but the pzem won't work with 3.3V. The board I used did have a 5V pin but what I did was use a 230VAC to 5VDC power supply to power the PZEM and esp8266, you could do the same and have the power supplies 5v dc connected to the Vin of you're board maybe

So I actually have made an update to this since, been meaning to do a follow-up actually but need to make the time! Basically I tried connecting directly to the hardware serial ports rather than doing software serial, had an odd problem where the PZEM would randomly disconnect with the esp8266 and I'd have to update or reboot the system then it would work. Weird but not the end of the world, hardware serial seemed to sort that out but comes with a few difficulties too, mostly the fact that you use the same serial connection for debugging/logging. Also bought new clamps as the ones I had weren't actually the correct ones, I'm in the same boat as yourself waiting for them to arrive back from China! When I get them in maybe I'll do a recap, but good luck in the meantime!

I don't actually have an Arduino MKR however the standard Arduino PZEM libraries should work with that

it can definitely be used with arduino's! in fact most of the libraries are based on arduino's. The three phase thing might be a bit trickier, I was wondering that myself as we have 3 phase at home. From the little looking I did the consensus I got was that you could just get 3 PZEM's and connect each to the live wires and have them all connected to the same neutral. a bit less elegant but its probably the only way to monitor it with these I think.

Unfortunately I don't have a setup that uses the esp32, though I don't think thered be much of a difference on the home assistant side. You'd just need to make sure you specify the rx and tx pins (like in the esp8266 I added) and just make sure your wiring is correct!

Yeah so I'm using a 5V power supply but the board I'm using is a wemos d1 mini which has a 5v to 3.3v regulator so that's how im powering the device. The 5v for the pzem's comes directly from the 5v power supply. In terms of diodes I havent had any issues with miscommunication with the pzem. They're all addressable so I'm not sure it would be too much of an issue. Occasionally I do have issues with reading not being taken but I've been told it could be because I use software serial rather than hardware serial, but I havent been able to test it out!

esp8266 or esp32 not an arduino but yeah thats how it works :)

Sure thing if you have any questions just ask and I'll see if I can help. No promises though!

@@fionnoch9867 sir i need coding can you shere to me

@@sajidmanzoor3606 if you check around 7 minutes I go through an Arduino version and if you check out the end of the video around 10 minutes I go through the esphome code. Is there anything in particular you need help with?

Interesting, admittedly I don't understand power factor too well (hence relying on pzem rather that something where I had the think it though 😅) but I thought that it was to do with the phase difference between the true power and the real power? Or is that what you estimated and I've just misunderstood?

@@fionnoch9867 Voltage and current should be taken from same phase each instrument. Otherwise you'll get wrong power factor and power calculation due to the phases shift. Good video! thanks for having shared it!

Thank you, I appreciate it! I've uploaded a copy of one of my basic dashboards on HomeAssistant to my github page github.com/Fionnoch/ESPHome_PZEM_Monitoring/blob/main/Basic_Dashboard_Code.yaml Its basic but its what I use most. Also HomeAssistant recently added an energy monitoring tab though that is really good for power monitoring and its fairly intuitive, I'd recommend checking it out

That is a problem I've been having with them never thought that this might be the issue!

thank you! hard to diagnose without a screenshot but I do occasionally have an issue where occasionally it might stop taking reading for a while generally i just turn it off and on and it fixes it. If you're not able to connect at all I'd check you have the correct address assigned to it first, if you're confident the wiring is all correct and the continuity of the wires are good I'd maybe try swapping the Rx and Tx pins in esphome

@@fionnoch9867 Right now I have it up and running. I have changed the wiring between TX and RX. Yhanks for your replay.

@@fionnoch9867 That's because you are using software serial. Software serial is a crap. Connect the pzems to the hardware serial port of the esp and use hardware serial.

My pleasure :)

Sure thing, I've been meaning to do a follow up for a while on how the circuit is wired up, few people have asked about that but just haven't made time to make it. The circuit board is really straight forward, I have a mains to 5v breakout board I got off aliexpress and I use the 5v and ground from that to power the esp8266 and the PZEM modules. the Rx and Tx pins of the pzem's are all joined and connect to pins 6 and 7 of the esp (forget which is Rx and which is Tx, think I mention it in the video) but that is the gist of it. I'll hopefully have time this weekend to put together a close up of the board, planning on making a few adjustments to the setup, there's also been talk on the esphome platform of making a way to reset the total energy usage.

ua-cam.com/video/h9fNpurEkZI/v-deo.html added a few more details in this video if you're interested.

@@fionnoch9867 you are an angel, thank you kindly

Same with the main board at the top

good point, it was only meant to be a temporary setup but its turning permanent. Might need to make some changes

we do need no water let the mf burn!

sure great video but how you not what hes saying? cuz i can't hear a thing.

Sure think I've uploaded the files I used to my GitHub page here: github.com/Fionnoch/ESPHome_PZEM_Monitoring It has the yaml file as well as the arduino sketches I used to set the addresses and test them out

@@fionnoch9867 thanks

​@@fionnoch9867 I am trying to connect 3 pzem to make triphasic medication using an esp32 but I have not been able to, does the code you show here help me to make that medication? I am programming the esp32 from the arduino IDE, I appreciate your help friend

Sure thing, are you looking for how to connect with the microcontroller (ESP8266) or are you wondering about the circuit board everything is on?

ua-cam.com/video/h9fNpurEkZI/v-deo.html Just made a video with a bit more elaboration on the circuit if you're interested