Hi there.
I have a PZEM_017 and using the USR_DR302 I was able to connect from my Windows 10 computer using the oficial software and USR-VCOM.
Now, of course I’m asking here because I need to connect this unit to my Home Assistant.
I’m already using the EPEver Solar Controller with rtuovertcp with another USR_DR302, so I have this configuration:
modbus:
- name: hub1
type: rtuovertcp
host: 172.16.10.98
port: 8088
timeout: 2
- name: hub2
type: rtuovertcp
host: 172.16.10.99
port: 8088
timeout: 2
- name: hub3
type: rtuovertcp
host: 172.16.10.100
port: 8088
timeout: 2
It works fine for my EPEver. This is my modbus.yaml file:
- platform: modbus
scan_interval: 30
registers:
#Solar Registers
- name: EPEver_Solar_Voltage #3100
hub: hub1
unit_of_measurement: V
slave: 1
register: 12544
register_type: input
scale: 0.01
- name: EPEver_Solar_Current #3101
hub: hub1
unit_of_measurement: A
slave: 1
register: 12545
register_type: input
scale: 0.01
precision: 2
- name: EPEver_Solar_Power_Instant #3102
hub: hub1
unit_of_measurement: W
slave: 1
register: 12546
register_type: input
scale: 0.01
precision: 2
reverse_order: true
- name: EPEver_Solar_Status #3201
hub: hub1
slave: 1
register: 12801
register_type: input
#Discovered status: 11 == 'Cut Out'
- name: EPEver_Device_Temperature #3111
hub: hub1
unit_of_measurement: °C
slave: 1
register: 12561
register_type: input
scale: 0.01
precision: 2
##########################Modbus Config Test for pzem-017##########################
- platform: modbus
scan_interval: 30
registers:
- name: PZEM_Voltage
unit_of_measurement: V
slave: 1
register: 0
register_type: input
scale: 0.01
- name: PZEM_Current
unit_of_measurement: A
slave: 1
register: 1
register_type: input
scale: 0.01
precision: 2
- name: PZEM_Power_Instant
unit_of_measurement: W
slave: 1
register: 2
register_type: input
scale: 0.1
precision: 1
- name: PZEM_Energy
unit_of_measurement: Wh
slave: 1
register: 4
register_type: input
- name: PZEM_High_Voltage_Alarm_Status
slave: 1
register: 6
register_type: input
- name: PZEM_Low_Voltage_Alarm_Status
slave: 1
register: 7
register_type: input
Using the EPEver config as example I tried to setup a modbus config for the PZEM-017, and as you can see, I don’t really know anything about modbus nor serial communication, so I’m on a try-and-error manner here, but after spending many hours of my weekend without luck, I stopped and decided to ask for help.
Using a software called Modbus Poll I was able to find that this address works for getting the values of Voltage, Current, Power, Energy, High-Voltage and Low-Voltage from the PZEM-017 with Slave ID: 1.
As you can see on the screenshot, I was able to get raw data from the unit, but I’m unable to transform that into something home-assistant will understand.
RTU Request on Modbus Poll
01 04 00 07 00 08 40 0D
Can anybody help me get this config right? I don’t really know anything about coils or registers. If someone helps me with this, probably many people will benefit from using this configuration. I searched all over the internet and was unable to find how to do this.
This is the error I’m getting on home-assistant logs:
2021-04-19 00:24:26 WARNING (MainThread) [homeassistant.components.modbus.sensor] Sensor configuration is deprecated, will be removed in a future release
2021-04-19 00:24:26 ERROR (MainThread) [homeassistant.components.sensor] Error while setting up modbus platform for sensor
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/helpers/entity_platform.py", line 205, in _async_setup_platform
await asyncio.shield(task)
File "/usr/src/homeassistant/homeassistant/components/modbus/sensor.py", line 178, in async_setup_platform
hub: ModbusHub = hass.data[MODBUS_DOMAIN][discovery_info[CONF_NAME]]
KeyError: 'modbus_hub'
Here’s the PDF for the PZEM-017 where I found the addresses for voltage, current, power, energy, low-voltage and high-voltage alarms:
https://www.solar-thailand.com/pdf/PZEM-003-Manual.pdf
Thank you!
And if I need to buy a coffee for someone, I’ll be glad to do it, just ask!
