Adding support for PZEM004T energy monitor for 3 phase - request

[roblad]

Hi,

Is it possible add USE_PZEM004T and add support for PZEM004T Energy monitor for 3 phase by using
USE_SERIAL_BRIDGE and report each phase through that functionality ? May be there is possibility to use 3 phase config for USE_PZEM004T as it is in that project:

https://github.com/apreb/eNode

[roblad]

Hi,

Is it possible to add 3 PZEM004T in one node?

Rgds,
RL

[0x3333]

I'm looking for the same thing.

As long as I can tell, each PZEM004T can be directly addressed, so you can hookup as many PZEM004T as you can in the same UART, when you read, you send the "ip address" of each module.

But the code in xdrv_03_energy.ino is not able to read from multiple sources. When I get my units I'll work on this. Don't know if this can be accomplished, but would be great.

[roblad]

Hi,
It means that when I change IP for each PZM and plug 3 of themas a 3 soft serials or plug 3 of them to 1 serial ? Could you sent me a private mesage if you could with more detailed manual or some code that you hook haw it looks. I am not such expert as you it will be very usfull :-)

Thanks,

[0x3333]

I mean plugging all the 3 PZEM in the same hardware/soft serial, like this:

The diode can be a BAT45, the pullup resistor can be a 10K to 5V.

But you need to program the PZEM address before using this method, the address can be sequential, like 0.0.0.1,0.0.0.2,0.0.0.3, it is not really a IP address.

But the tasmota must be changed to accommodate multiple meters, you can test using an arduino.

[roblad]

Hi,

Many thanks, but I have a question, may be stupid, Master UART means tasmota serial ? Yes ?

And all of the slaves there are PZEMs Am I right ?

Have you got it on your Arduino/ESP connected ?

I will try it ofcource but first of all I am working for MQTT bridge through serial bridge of Tasmota - I have Nodes based on it:

https://github.com/artekw/sensnodetx
https://github.com/artekw/sensnodetx

and receiver basenode which prints output to serial as JSON, I am working on www displaing all recaived data as normal sensors pluged to tasmota, next one task will be the hook of PZM004 ino.

and

also see that:

https://github.com/apreb/eNode/issues/1#issuecomment-354369777

[0x3333]

Yes, Tasmota master, PZEM slaves. Yes, connected to ESP.

[roblad]

Hi,

Could you share Your ino code for PEZM for further testing, I have 3 already :-) after 2 months shipment :-) ?

[0x3333]

Well, I don't have it actually, but here is some to start with:

#include <PZEM004T.h>

PZEM004T pzem(10, 11);

IPAddress ip[3];

void setup() {
  Serial.begin(9600);

  ip[0] = IPAddress(0, 0, 0, 1);
  ip[1] = IPAddress(0, 0, 0, 2);
  ip[2] = IPAddress(0, 0, 0, 3);
}

void loop() {
  for (uint8_t j ; j < 3 ; j++) {
    Serial.print("ID: ");
    Serial.print(j);
    Serial.print(": ");
    float v = pzem.voltage(ip[j]);
    if (v < 0.0)
      v = 0.0;
    Serial.print(v);
    Serial.print("V; ");

    float i = pzem.current(ip[j]);
    if (i >= 0.0) {
      Serial.print(i);
      Serial.print("A; ");
    }

    float p = pzem.power(ip[j]);
    if (p >= 0.0) {
      Serial.print(p);
      Serial.print("W; ");
    }

    float e = pzem.energy(ip[j]);
    if (e >= 0.0) {
      Serial.print(e);
      Serial.print("Wh; ");
    }
    Serial.println();
  }

  delay(1000);
}

Remember to call pzem.setAddress(ip[X]); with only one connected to set it's internal address.

[roblad]

Hi,

Many thanks, but what do you mean 👍
Remember to call pzem.setAddress(ip[X]); with only one connected to set it's internal address.

I did not catch you, it means that I have to set the pzem.setAddress(ip[X]) step by step with plug only one PZEM for initial setup of IP ? And next plug all of them for finale mastering am I right ?
What about Save set values in PZEM, will they disappear after power lost ?
What do you mean "with only one connected to set it's internal address"

[0x3333]

Buddy, dont get me wrong, but you should do your homework...

Each PZEM have an Address. You must set a unique address to each one, individually. That's what I meant with setAddress. Create another sketch to set the addresses. Then run the one I provided.

[roblad]

Hi,

" but you should do your homework" yes I will :-), thanks for explanation, I let you know about my results :-)

[0x3333]

Great, as soon as I get my sonoffs, I'll let you know my findings.

[asking23]

Any updates ? but in this way we would never be able to poll 3 Phases Simultaneously to Make Graph/Trend 3 Phases. Each Consecutive reading will have 1 Second Interval so wont be able to correlate voltage on each phase to each other.

[0x3333]

I'm looking to do the readings in the same time slice. But I'll need to change the code. I'm on vacations now, next week I'll work on it.

[0x3333]

Here I'm again. I read the code and believe that create another xdrv for this is the best option to me. Change a code that is shared with other devices to add 2 more phases will require a lot of effort and will not benefit the others. I'm looking to create a xdrv_13_energy_3phases.ino driver, especifically to PZEM004T, this way it will not add more line of codes to other energy meters and increased complexity.

I've only an hour at night to work on side projects, but will give it some attention.

@arendst , do you believe that this is the right thing to do? What is your direction on this matter?

Thanks!

[roblad]

Hi,

Where is xdrv_13_energy_3phases.ino ?

[0x3333]

There is no xdrv_13_energy_3phases.ino, I'm about to write it.

[roblad]

aaaaaaa :-)

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[0x3333]

Well, I changed to ESPurna, and in that firmware, it's simply not possible, it is too slow to read all magnitudes from all sensors. I'm working in a custom board with an Arduino Pro Mini that will read all PZEM(Max 6 devices) and will communicate using I2C, all measurements will be read in a single call. I'll let you know the progress.

[rt400]

any new with this ?

[0x3333]

I'm finishing the custom board, the board will read up to 6 PZEM004T and will communicate using I2C/SPI. It constantly read the PZEM and buffer the responses, when asked the response is instantaneous. In my board I also added a ESP-01 module, so I don't need a Sonoff Basic or alike. But it is not finished yet...

[0x3333]

Probably I will use this repo: https://github.com/0x3333/powermeter

But the code probably will change...

[rt400]

https://github.com/apreb/eNode
did you see this ?
its looks that he success to do that..
can you share the diagram of connection ?
and i understant that you connect directly to wemos or arduino board ..so why use also in spi or i2c ?

[0x3333]

Yes, I saw that.

In my case, the arduino pro mini(Not running arduino) is connected to a ESP-01(Running Espurna, but can work with any other firmware) using a spi connection. The arduino is only doing the hard work.

[roblad]

Hi,

Great, but will you add that to tasmota as a 3 phase module ?

[0x3333]

Sure, @arendst will need to approve a custom driver, but sure.

[Jabol86]

@TrDA-hab

I created this )

And i made this project 100% open to all.
https://github.com/TrDA-hab/Projects/tree/master/PZEM%2BESP-01S

There would be no option to buy a ready-made soldered plate?

[blackscreener]

With proper v3 1k mod PZEM need 3V voltage to get working. For pull up I need 3,3V or 5V ?? Why do you use 5V pull up with 3.3V logic ?

[IamStadam]

With proper v3 1k mod PZEM need 3V voltage to get working. For pull up I need 3,3V or 5V ?? Why do you use 5V pull up with 3.3V logic ?

I gave 3,3 without any mods. It works great for a year or so.

[blackscreener]

I gave 3,3 without any mods. It works great for a year or so.

This is the (proper) Way:

Works even without pull up.

[ahmaddxb]

Is 1N60, 1N60P diode compatable? I have it working with them currently but was trying to compare the datasheet with a bat54ws and dont really know about diodes.

I got some BAT54WS diode but they are smd type and cant really use them in my application.

Would be good to know if 1N60, 1N60P diode can do the job.

[ahmaddxb]

Any reason why reactive power is not the same on all. Right now in the testing phase and just using one phase connected to 3 devices and all load clamp on the same load.

Edit:
I swapped round devices address it seams the same one will read reactive power only. Dont know if that one device is wrong or if the other 2 are wrong. Is there a known load that should read reactive power I can test?

Edit2:
Testing with a 13w led buld they all read reactive power now!!! The previous result I was using a hair dryer at full speed as the load. Anyone know why this would happen?

Edit3:
Moving the clamp from the device which has the reactive power to another also move the reactive load reading to the new device, so its clamp causing this.

[ascillato2]

Split Total Energy is supported now.

Docs: https://tasmota.github.io/docs/Commands/#setoption128

• Command SetOption128 1 to enable split total energy results
• Commands EnergyTotal<phase>, EnergyToday<phase> and EnergyYesterday<phase> to (re)set energy values

---

Issues: #13030 , #6160
Commit: d3fc03d

[barbudor]

Split Total Energy is supported now.

Docs: https://tasmota.github.io/docs/Commands/#setoption128

• Command SetOption128 1 to enable split total energy results

So128 is Http API
SO129 is split energy

[grappini]

Any reason why reactive power is not the same on all. Right now in the testing phase and just using one phase connected to 3 devices and all load clamp on the same load.

Edit: I swapped round devices address it seams the same one will read reactive power only. Dont know if that one device is wrong or if the other 2 are wrong. Is there a known load that should read reactive power I can test?

Edit2: Testing with a 13w led buld they all read reactive power now!!! The previous result I was using a hair dryer at full speed as the load. Anyone know why this would happen?

Edit3: Moving the clamp from the device which has the reactive power to another also move the reactive load reading to the new device, so its clamp causing this.

After reading all the content from this topic i am confused. What wiring diagram did you use to make it work ?

Did you add every pzem module like this ( ModuleAddress x) without changing pzem address with factory software ?

ModuleAddress

Set the address of a PZEM module1..3 = the last octet of the PZEM-004T serial address = the last octet of the address on MODBUS PZEM energy monitoring modulesPrior to setting the module address, the PZEM must be connected to both RX and TX, and AC voltage.Connect one PZEM at a time and issue this command. Repeat for each PZEM to be connected for multi-phase monitoring.The command without an argument cannot be used to read the address of the connected PZEM.

[arendst]

• First learn the difference between active, reactive and apparent power.
• Then use a resistive load to measure active power while reactive and capacitive power will be zero.
• Then conclude your one PZEM device is faulty as Tasmota is just representing the values read from your PZEM's. It doesn't do anything with the values provided by the PZEM.

[grappini]

Sorry Theo but i was asking about the correct wiring diagram of the pzems to theESP 8266 and how to add them to Tasmota.

[barbudor]

@grappini so don't uselessly quote previous message

There is a how-to in Github Discussion where everything is explained with diagrams and commands

[grappini]

Sorry , i'm not so familiar with github interface , i'll not quote again long messages. I know how to connect 1 pzem with esp8266 but i can't find any diagram for connecting 2 or 3 pzems to one esp 8266.

[blackscreener]

@grappini
Check my post.

[grappini]

Thanks @blackscreener for trying to help me.

[barbudor]

So looking for a way to connect PZEM 17 that are RS485 in a topic dedicated to PZEM 004 that are RS232/TTL...... Doesn't sound good idea.
Now people coming to this thread will have confusing diagrams for PZEM 004.
I would suggest that now you have experience, you share it in a nice PZEM 17 how-to guide which make it clear and easy to find.

[grappini]

I apologize for the confusion , i thought pzem 004 is also RS485. I'm using pzem 016 and 017 for my aplications.
I would like to connect multiple pzem 016 for 3 phase monitoring and in the future multiple pzem 017 for dc.
For the correctness of the information i will remove the wrong info from previous post.

[IerwinDE]

I have a device set up as described in this thread, running three PZEM 004 on 3 Phases and it has been working fine for over a year.
I recently got interested and Photovoltaics and would be really interested in the Total Energy per Phase.
Would it be possible to calculate the kWh for each phase seperately?

[sfromis]

SetOption129 exists as a recent feature for "split total energy results", but I have no experience with PZEM devices.

[IerwinDE]

thanks a lot, upgrading to the latest versio of tasmota and setting Option129 worked like a charm

[Hambinex]

Trying to make 3-phase work using ESP32 C3.
One phase works fine, but when trying ModuleAddress 1/2/3 the device reports "done", but on the OSCILLOSCOPE I cannot see any communication after issuing the command. The communication simply silences for a while, then every second reading from PZEM module is restored. Can someone give me a hint? Thanks.

[barbudor]

Did you configured each PZEM on its separated address one after the other, with onely 1 PZEM connected at a time to the ESP ?

[Hambinex]

Yes, one PZEM connected, but after issuing the command, the serial interface silences. Normal serial communication (reading of the power values) resumes after 5-6 seconds. It is like something is blocking the sending of the command to PZEM. Using the standard RX, TX of the ESP32 C3 module.

[phmllr]

hey folks
i got an problem with the PZEM and the ESP.
I followed different setups for this 3-phase solution an tasmota first shows me all 3 phases. But after a few seconds the third phase disapears and after another few seconds the second phase disapears too.
Then there are only the values for 1 phase are displayed and switching after everey 5 seconds between values showing only 0 an the last value that was measured. Via MQTT i wanted to read all values but they are static and dondt change anymore.

did anyone else got this problem?

[barbudor]

@phmll
I suggest you open a new discussion and provide more details on your setup (not just "I followed the doc")

• backlog template; module; gpio all
• How you setup the 3 PZEM
• logs with weblog 3

Thanks

[andy75andreas]

Hello,
is it possible to connect 4 PZEM to an ESP32?
I have 3x PZEM16 via an RX (the circuit with the diodes) that goes great.
Now I wanted to capture another consumer and need another additional PZEM.
The TX line have all 4 together.
The RX line is divided into 3x on RX and 1x extra RX1.

Is that possible?

[barbudor]

You can have up to 8 phases on an ESP32 so that should be possible to extend the system to 4 but with using an additional RX pin, still use the same pin and have the PZEM on address 1, 2, 3 and 4

I can't tell for sure but that seems possible
Would need to be tested

[temasnick]

Can anyone succesfully setup 3 PZEMs with "wemos s2 mini" I tried everything (with diodes and 10k pullup, 3.3v with 1k resistor hack or 5v) but it is working only with one PZEM.

[bltoby]

Can anyone succesfully setup 3 PZEMs with "wemos s2 mini" I tried everything (with diodes and 10k pullup, 3.3v with 1k resistor hack or 5v) but it is working only with one PZEM.

Hi, I couldn't make even one working.
So I'm so "glad" to see you can get one PEZM-004T work with WEMOS S2 mini. How is your wiring and configuration?

[ThinkoMatej]

D1 mini Tasmota V13 no pullup resistor, BAT85 diodes , 1K resistor on Pzem 5V.