Domoticz

The PZEM-014/016 can measure Ac voltage V, current A, active power W, frequency Hz, power factor pf and used energy Wh. You can read all these values from the PZEM with the help of a Rs-485 Half duplex bus. The protocol they used is the well known modbus protocol.

grasuoare wrote: ↑Monday 15 July 2019 22:30 Hi,

Thank you for this plugin! It works like a charm. I have now 2 boards with relays with lights on.

My questions. It is possible to read the state of the relays from the board? The board is the exact model that you used. If yes could you please tell me the settings? I tried all

ahjwinth wrote: ↑Tuesday 16 July 2019 19:45 hi same problem is that working when you use modbus slave simulator instead of your solar system ? it is not clear for me?
I could use some help. I have an Domoticz running on RPI3B without issues.
I have installed solar panels with an Solar edge inverter which I try to read data from using modbus TCP. I have tested the modbus read option using an simulator on the PC and I can read the requested addresses.

On domoticz installed the modbus option including the dependancies. I have configured the modbus read but whatever I do I get the same error message: "Can't convert 'int' object to str implicitly"

Can someone help me with what I'm doing wrong.

See below:

Code: Select all

2019-07-16 19:39:52.330 Status: (Solaredge) Stopped.
2019-07-16 19:39:56.887 (Solaredge) onStart called
2019-07-16 19:39:56.887 (Solaredge) Debug logging mask set to: NONE
2019-07-16 19:39:56.887 (Solaredge) Sensor Type: Custom
2019-07-16 19:39:56.888 (Solaredge) Modbus RTU/ASCII/TCP - Universal READ loaded.
2019-07-16 19:39:56.525 Status: (Solaredge) Started.
2019-07-16 19:39:56.883 Status: (Solaredge) Entering work loop.
2019-07-16 19:39:56.885 Status: (Solaredge) Initialized version 1.2.0, author 'S. Ebeltjes / domoticx.nl'

2019-07-16 19:40:06.906 Error: (Solaredge) 'onHeartbeat' failed 'TypeError':'Can't convert 'int' object to str implicitly'.
2019-07-16 19:40:06.906 Error: (Solaredge) ----> Line 489 in '/home/pi/domoticz/plugins/modbus-read/plugin.py', function onHeartbeat
2019-07-16 19:40:06.906 Error: (Solaredge) ----> Line 297 in '/home/pi/domoticz/plugins/modbus-read/plugin.py', function onHeartbeat

Configuration:

michaelz wrote: ↑Tuesday 23 July 2019 0:14 hi guys,

i have excactly the same problem :
2019-07-23 00:08:57.565 Error: (lecture modbus) 'onHeartbeat' failed 'TypeError':'Can't convert 'int' object to str implicitly'.
2019-07-23 00:08:57.565 Error: (lecture modbus) ----> Line 489 in /home/pi/domoticz/plugins/modbus-read/plugin.py, function onHeartbeat

i have raspberry pi3b+
installed dependencies
i have tested it with modbus simulator and always the same message

domoticz v4.97000
modbus read v1.2
i use modbus tcp-ip

i have made a lot of test and nothing is working is the v1.2 has a bug ? is the version 4.97 is not working fine?

thank you so mush for your helping

michael

michaelz wrote: ↑Tuesday 23 July 2019 16:40 hi,

ok i have find the problem
on tcp-ip you need to put the ID
example : 192.168.3.10/1

i can read value in a schneider m241 data settings int16 is working fine
next step writing value

thanks a lot to the author of this plugin

good day

michael z

Antikillerbm wrote: ↑Wednesday 24 July 2019 19:04 Hi
Im trying modbus first time. I use domoticz v4.11024@Python 3.5.3
I just upload an example to my arduino and try to read something trough modbus RTU

Code: Select all

#include <ModbusRtu.h>

// assign the Arduino pin that must be connected to RE-DE RS485 transceiver
#define TXEN	2 

// data array for modbus network sharing
uint16_t au16data[16] = {
  3, 1415, 9265, 4, 2, 7182, 28182, 8, 0, 0, 0, 0, 0, 0, 1, -1 };

/**
 *  Modbus object declaration
 *  u8id : node id = 0 for master, = 1..247 for slave
 *  u8serno : serial port (use 0 for Serial)
 *  u8txenpin : 0 for RS-232 and USB-FTDI 
 *               or any pin number > 1 for RS-485
 */
Modbus slave(1,0,TXEN); // this is slave @1 and RS-485

void setup() {
  slave.begin( 9600 ); 
}

void loop() {
  slave.poll( au16data, 16 );
}

Unfortunately I always get the error that ot depend of payload or register number.

Code: Select all

2019-07-24 19:53:25.632 (test_device) Modbus error decoding or received no data (RTU/ASCII/RTU over TCP)!, check your settings!

On the other side I can read data with modbus poll simulator

What am I doing wrong? Thx.

PS there is no any information what should be a payload for common purpose in domoticz (sensors, buttons etc).

Antikillerbm wrote: ↑Thursday 25 July 2019 22:40 I tried example script as well

Code: Select all

#!/usr/bin/env python
 from pymodbus.client.sync import ModbusSerialClient
 client = ModbusSerialClient(method="rtu", port="/dev/ttyUSB0", stopbits=1, bytesize=8, parity="N", baudrate=9600, timeout=1, retries=2)
data = client.read_input_registers(0, 4, unit=12) #[b] FUNCTIE 04[/b] - Lees register (start=0, lengte=4,[b] unitid=12)[/b]
client.close()
 print data
print "waarde_0:", data.registers[0]
print "waarde_1:", data.registers[1]
print "waarde_2:", data.registers[2]
print "waarde_3:", data.registers[3]

But the error looks like same with domoticz plugin

Code: Select all

root@orangepipcplus:/home/anti# python3 mbtest.py
Modbus Error: [Input/Output] Modbus Error: [Invalid Message] Incomplete message received, expected at least 2 bytes (0 received)
Traceback (most recent call last):
  File "mbtest.py", line 8, in <module>
    print("waarde_0:", data.registers[0])
AttributeError: 'ModbusIOException' object has no attribute 'registers'

Slave device answering nothing to any read requests