How to use PZEM004T Energy Monitor with esphome

gieljnssns · January 13, 2021, 5:59pm

This software is windows only, I do not have acces anymore to a windows pc.
But I have managed to set the address by first flash an esp as Tasmota and then

Setting Module ID

As well as wiring for multidrop, the devices need to have an ID set (Sometimes referred to as IP address online, but it is a serial address). Tasmota now also allows you to set this easily with the ModuleAddress command- previously this was done with some serial commands (or with windows software linked below, but I tried this unsuccessfully).

To set the address, connect each module one at a time and on the Tasmota console, run eg

                  ModuleAddress 2

You'll get a response to say 'Done', but there is no reply to ensure it is carried out successfully. Obviously, set 1, 2 or 3 as needed but remember to disconnect the others when you set each one.

And then connect them to and esp with esphome flashed

MarkB1 · January 16, 2021, 6:15pm

Hey benek984, love what you have done wit the LCD Display, Is it a 2004 with I2C?

Also is it ESPHOME or Arduino Code?,
Could you share your config?

Kind Regards,

gt4020 · February 25, 2021, 1:36am

This project is not with Esphome but Zigbee. Can be realized in 1 phase version or in three-phase.

thejuless67 · March 7, 2021, 7:35pm

Hello,

My Pzem is directly plug into the gpio 14 and 15 of my raspberry (same as the video:link )
the code below don’t work i got the message:

Platform error sensor.pzemac - Integration 'pzemac' not found.
Component error: uart - Integration 'uart' not found.

Have somehone a idea how make this work?

Thanks

prates · March 11, 2021, 1:19am

Has anybody take a step further and played with appliances classification? Now this is working fine here I was wondering how to automatically identify certain appliances or loads activation and individually monitor their consumption. I’m not the “AI guy” but pretty sure ML can do a good job for that. If anyone can point out a starting point, that would be great.

juavinas · April 5, 2021, 7:54pm

Hello,
I used your example. All three PZEM-004T(v3.0) changed to Address: 1, 2, 3. But only one checking, not three, Diodes used 1N5819:

Here is my code in esphome:

esphome:
  name: pzem_3phase
  platform: ESP8266
  board: nodemcuv2

wifi:
  ssid: "******"
  password: "********"
  manual_ip:
    static_ip: 192.168.1.*
    gateway: 192.168.1.1
    subnet: 255.255.255.0

  ap:
    ssid: "Pzem 3Phase Fallback Hotspot"
    password: "euB80xyaDEPM"

captive_portal:

logger:
  #level: VERY_VERBOSE    #too much info for board
  level: DEBUG
  baud_rate: 0  #needs 0, because info & data goes thru one line.

api:
  password: "********"

ota:

web_server:
  port: 80

time:
  - platform: homeassistant
    id: homeassistant_time

uart:
  - id: ubus
    tx_pin: GPIO1  #to RX, doesn't working right now
    rx_pin: GPIO3  #to TX, doesn't working right now
    baud_rate: 9600
    stop_bits: 1

modbus:
  id: mbus
  uart_id: ubus

switch:
  - platform: restart
    name: needs restart 

text_sensor:
  - platform: version
    name: "ESPHome Version"
    hide_timestamp: True

sensor:
  - platform: wifi_signal
    name: "PZEM 3 phase WiFi Signal Sensor"
    update_interval: 60s
    
  - platform: pzemac
    modbus_id: mbus
    voltage:
      name: "PZEM-004T V3 L1 Voltage"
      unit_of_measurement: V
    current:
      name: "PZEM-004T V3 L1 Current"
      unit_of_measurement: A
    energy:
      name: "PZEM-004T V3 L1 Energy"
    power:
      name: "PZEM-004T V3 L1 Power"
      unit_of_measurement: W
    frequency:
      name: "PZEM-004T V3 L1 Frequency"
      unit_of_measurement: hz
    power_factor:
      name: "PZEM-004T V3 L1 Power Factor"
    update_interval: 2s
    address: 1
  - platform: pzemac
    modbus_id: mbus
    voltage:
      name: "PZEM-004T V3 L2 Voltage"
      unit_of_measurement: V
    current:
      name: "PZEM-004T V3 L2 Current"
      unit_of_measurement: A
    energy:
      name: "PZEM-004T V3 L2 Energy"
    power:
      name: "PZEM-004T V3 L2 Power"
      unit_of_measurement: W
    frequency:
      name: "PZEM-004T V3 L2 Frequency"
      unit_of_measurement: hz
    power_factor:
      name: "PZEM-004T V3 L2 Power Factor"
    update_interval: 2s
    address: 2
  - platform: pzemac
    modbus_id: mbus
    voltage:
      name: "PZEM-004T V3 L3 Voltage"
      unit_of_measurement: V
    current:
      name: "PZEM-004T V3 L3 Current"
      unit_of_measurement: A
    energy:
      name: "PZEM-004T V3 L3 Energy"
    power:
      name: "PZEM-004T V3 L3 Power"
      unit_of_measurement: W
    frequency:
      name: "PZEM-004T V3 L3 Frequency"
      unit_of_measurement: hz
    power_factor:
      name: "PZEM-004T V3 L3 Power Factor"
    update_interval: 2s
    address: 3

This is working schematic & code, if someone needs, take a look

gieljnssns · April 5, 2021, 9:10pm

I’m not at home now, I’ve use scheme 1 BUT I think you have to use the VU instead of the 3V

gt4020 · April 5, 2021, 9:39pm

Schematic to use is the first, but there is an error in R1 10k placement there:
it must be placed between 3V3 and Node Mcu RX pin.
You placed R1 on D1 catode: this is wrong.
Schematic 2 is totally wrong instead. Is better if you throw it away

PS: you don’t need rs485 converter with pzem 004T.

silvrr · April 6, 2021, 12:24am

What’s the reporting response time on these with esphome?

Wondering if I could make a automatic sensor to turn on my dust collector. Table saw and other tools draw plent my of power and combined with a relay it could be an awesome solution if quick enough.

juavinas · April 6, 2021, 4:52am

Hello,

Thank you, I found it issue. Needed logger to change it to 0:

logger:
  level: DEBUG
  baud_rate: 0

juavinas · April 10, 2021, 7:49pm

Hello,

one question appear, why these diodes needs, if all have different address?

sheminasalam · April 11, 2021, 7:52am

Is there a way to reset the energy counter of the individual setups?
Also is there a way to find the address of the pzem connected to this?

Raz_Schweitzer · April 16, 2021, 8:59pm

Copied this code,
Got all three PZEMs (V3’s)addresses through Tasmota ModuleAddress and got “Done” answer from them.
Connected to NodeMCU
Diodes are 1N4148 that I had in hand (Maybe that’s my issue?)
10K resistor between 5v and RX
If I connect more than one PZEM I get
“[modbus:074]: Modbus CRC Check failed!”

Anyone had this issue?
I’ve been at it for days now

4xvince · April 22, 2021, 9:00am

Hi, I have done in an other way, maybe this can help you.

First I have found the PZEM04 complete schematic below:

First before connected all RX/TX PZEM04, set the address individually.
I have done with the windows software, one connected at a time, and set a different address

I use one ESP8266, with 4 PZEM04, with following connections:
The GND of ESP8266 and 4 PZEM04 connected together.
The +5V pin of the 4 PZEM04 connected to the ESP8266 3V3.
The TX pin of ESP8266 is connected to the RX 4 PZEM04 together.
The RX pin of ESP8266 is connected to the TX 4 PZEM04 together.

this because the TX PZEM04 is Open Collector type
but to not overload the TX optocouplers, I remove the R4 and R9 on 3 PZEM04

That works fine for me.
Benefits:

The RX signal ESP8266 “voltage low” value is better with this solution. (may reduce CRC Check failed)
no need to add external components

Another recommendation:
As the CT is connected to the neutral by the PZEM04, it is better to install the CT on neutral wire.
This because the difference voltage from CT and neutral is near than 0V.
But when installing the CT on live wire, the difference voltage from CT and live is the AC grid voltage.
=> So the risk to make a short circuit live to neutral is bigger
The only protection to prevent it is the plastic insulation of the CT (which is probably not certified for this)

camnop · August 7, 2021, 3:52am

Hi @4xvince, when you say that you have removed the R4 and R9 on 3 PZEM04, you mean that you really removed the R4 and R9 so no connection anymore with TX in that line

option 1

or you have connected directly the 5V to TX with no R4 and R9?

option 2

camnop · August 7, 2021, 4:18am

I have five PZEM-004T ver. 3 and I’m trying to connect to Lilygo TTGO T-Internet-POE ESP32-WROOM.

I set each PZEM004v3 address individually with the Windows software, one connected at a time.

When I try to connect the fifth PZEM, no one works. When I try to connect four PZEM, they works at begin but after, only three works. Now I’m having only two PZEM working at same time.

Is my circuit bellow correct? Do I need to use a diode, resistor or something like that? Should I use 3V3 or 5V?

My power source is an AC-DC 5V 5A

My esp32:

My Code:

esphome:
  name: lilygo-ttgo-t
  platform: ESP32
  board: esp32dev
  
ethernet:
  type: LAN8720
  mdc_pin: GPIO23
  mdio_pin: GPIO18
  clk_mode: GPIO17_OUT
  phy_addr: 0

# Enable logging
logger:
  level: DEBUG

# Enable Home Assistant API
api:

ota:
  password: "e25axxxxxxxxxxxxxxxxxa58"
  
web_server:
  port: 80


dallas:
  - pin: GPIO15
    update_interval: 30s
    id: dallas_gpio15
  
uart:
  rx_pin: GPIO35 
  tx_pin: GPIO14 
  baud_rate: 9600
  #stop_bits: 1
  #stop_bits: 2
  id: ubus1

sensor:

#PZEM 004T V3 100A

  - platform: pzemac
    current:
      name: "AAA - L1 - Current"
    voltage:
      name: "AAA - L1 - Voltage"
    energy:
      name: "AAA - L1 - Energy"
    power:
      name: "AAA - L1 - Power"
    frequency:
      name: "AAA - L1 - Frequency"
    power_factor:
      name: "AAA - L1 - Power Factor"
    update_interval: 10s
    address: 1
    
  - platform: pzemac
    current:
      name: "AAA - L2 - Current"
    voltage:
      name: "AAA - L2 - Voltage"
    energy:
      name: "AAA - L2 - Energy"
    power:
      name: "AAA - L2 - Power"
    frequency:
      name: "AAA - L2 - Frequency"
    power_factor:
      name: "AAA - L2 - Power Factor"
    update_interval: 10s
    address: 2
    
  - platform: pzemac
    current:
      name: "AAA - L3 - Current"
    voltage:
      name: "AAA - L3 - Voltage"
    energy:
      name: "AAA - L3 - Energy"
    power:
      name: "AAA - L3 - Power"
    frequency:
      name: "AAA - L3 - Frequency"
    power_factor:
      name: "AAA - L3 - Power Factor"
    update_interval: 10s
    address: 3

  - platform: pzemac
    current:
      name: "BBB - L1 - Current"
    voltage:
      name: "BBB - L1 - Voltage"
    energy:
      name: "BBB - L1 - Energy"
    power:
      name: "BBB - L1 - Power"
    frequency:
      name: "BBB - L1 - Frequency"
    power_factor:
      name: "BBB - L1 - Power Factor"
    update_interval: 10s
    address: 4
      
  - platform: pzemac
    current:
      name: "BBB - L2 - Current"
    voltage:
      name: "BBB - L2 - Voltage"
    energy:
      name: "BBB - L2 - Energy"
    power:
      name: "BBB - L2 - Power"
    frequency:
      name: "BBB - L2 - Frequency"
    power_factor:
      name: "BBB - L2 - Power Factor"
    update_interval: 10s
    address: 5

#HALL SENSOR

  - platform: esp32_hall #GPIO 39 and 36
    name: "ESP32 Hall Sensor"
    update_interval: 10s
.
.
.

4xvince · August 11, 2021, 3:08pm

Hi,
Yes if you connect multiples PZEM, you only need one with R4 and R9.
So you can simply removed R4 and R9 from all other PZEM.
(First schematic is correct)

4xvince · August 11, 2021, 4:02pm

Hi,
As I mentioned “The +5V pin of the 4 PZEM04 connected to the ESP8266 3V3.”

You really need to power the +5V pin of PZEM04 to a 3V3 source, as the input of the ESP32 is only compliant to 3.3V logic.
=> by connecting a +5V source you may have damage the D35 pin or/and the ESP32.

Another thing to check is the current capacity of the ESP
You have 5 PZEMs, and each consume near 2mA, then the ESP have to drive near 10mA
The ESP has a typical current capability of 28mA

(search IOL Electrical Characteristics)
=> It’s seams to be enough

delboydell · August 11, 2021, 4:11pm

is this not compatible with the new energy update? when trying to set up my pze does not show, does the yaml need tweaking?

hqsone · August 16, 2021, 5:39pm

Can ESPHOME + PZEM show full energy, not only active?