Voltronic AXPERT MKS IV 5.6KW no data via USB2serial adapter

[byte4geek]

I have the issue that no data was sent to mqtt, all entity was configured correctly on HA. This what i see on inverter poller:

pi@raspberrypi:~/ha-inverter-mqtt-agent/manual $ docker exec -it voltronic-mqtt bash -c '/opt/inverter-cli/bin/inverter_poller -d -1' Fri Apr 1 14:58:35 2022 INVERTER: Debug set Fri Apr 1 14:58:35 2022 INVERTER: Current CRC: 49 C1 Fri Apr 1 14:58:36 2022 INVERTER: QMOD reply size (5 bytes) configuration options for the actual inverter polling process...es. Buffer: (NAKs▒

The device to read from... Use: /dev/ttyS0 if you have a serial device, /dev/ttyUSB0 if a USB<>Serial, /dev/hidraw0 if you're connecting via the USB port on the inverter. device=/dev/ttyUSB0 #device=/dev/serial1 #device=/dev/hidraw0

How many times per hour is the program going to run... This is used to calculate the PV & Load Watt Hours between runs... If unsure, leave as default - it will run every minute... (120 = every 30 seconds)... run_interval=120

This allows you to modify the amperage in case the inverter is giving an incorrect reading compared to measurement tools. Normally this will remain '1' amperage_factor=1.0

This allows you to modify the wattage in case the inverter is giving an incorrect reading compared to measurement tools. Normally this will remain '1' watt_factor=1.01

The following settings allow you to modify runtime buffers. N.B. These values may not be applicable to al Fri Apr 1 14:58:36 2022 INVERTER: Current CRC: B7 A9 Fri Apr 1 14:58:39 2022 INVERTER: QPIGS read timeout Fri Apr 1 14:58:40 2022 INVERTER: QPIGS reply too short (7 bytes) Fri Apr 1 14:58:40 2022 INVERTER: Current CRC: F8 54 Fri Apr 1 14:58:43 2022 INVERTER: QPIRI read timeout Fri Apr 1 14:58:44 2022 INVERTER: QPIRI reply too short (7 bytes) Fri Apr 1 14:58:44 2022 INVERTER: Current CRC: B4 DA Fri Apr 1 14:58:47 2022 INVERTER: QPIWS read timeout Fri Apr 1 14:58:48 2022 INVERTER: QPIWS reply too short (7 bytes) Fri Apr 1 14:58:53 2022 INVERTER: Current CRC: 49 C1 Fri Apr 1 14:58:53 2022 INVERTER: QMOD reply size (5 bytes) configuration options for the actual inverter polling process...tes. Buffer: (NAKs▒

Fri Apr 1 15:05:28 2022 INVERTER: Current CRC: B7 A9 Fri Apr 1 15:05:31 2022 INVERTER: QPIGS read timeout Fri Apr 1 15:05:32 2022 INVERTER: QPIGS reply too short (7 bytes) Fri Apr 1 15:05:32 2022 INVERTER: Current CRC: F8 54 Fri Apr 1 15:05:35 2022 INVERTER: QPIRI read timeout Fri Apr 1 15:05:36 2022 INVERTER: QPIRI reply too short (7 bytes) Fri Apr 1 15:05:36 2022 INVERTER: Current CRC: B4 DA Fri Apr 1 15:05:39 2022 INVERTER: QPIWS read timeout Fri Apr 1 15:05:39 2022 INVERTER: QPIWS reply too short (16 bytes) Fri Apr 1 15:05:45 2022 INVERTER: Current CRC: 49 C1 Fri Apr 1 15:05:45 2022 INVERTER: QMOD reply size (5 bytes) Fri Apr 1 15:05:45 2022 INVERTER: QMOD: incorrect start/stop bytes. Buffer: (L s (NAKss 000000010000000010000 48.0 46.0 42.0 56.4 54.0 0 030 060 0 2 2 9 00 0 0 54.0 0 1 0 00 00 00000

[byte4geek]

Solved with:

This allows you to modify the buffersize for the qpiri command

qpiri=103

and with a direct usb cable: device=/dev/hidraw0

[byte4geek]

Sometime (up to 2 times per day) the /dev/hidraw0 disappear, i must to power off the inverter and power on again, someone have this issue?

[ned-kelly]

Hi @byte4geek - Sorry I've changed inverters so I'm not as active here now - I also used to use a USB2serial adapter and found that I had to reboot the raspberry pi each night, there was no other fix, and I ended up dumping the usb2serial and just using the USB Port on the inverter directly

[byte4geek]

I don't know why, but the docker can't set the serial port baud rate.

i wrote a pyhton script that do this:

import serial

serialport = serial.Serial("/dev/ttyUSB0", 2400, timeout=0.5)
        
serialport.write(b"QMOD 4\r")
response = serialport.readlines(None)
print(response)

serialport.write(b"QPIGS 5\r")
response = serialport.readlines(None)
print(response)

and insterted into the crontab at boot:

@reboot python set_ttyUSB0.py > /home/pi/out.txt

and it works fine.

follow the discussion here: https://community.home-assistant.io/t/programmatically-read-data-from-your-solar-inverter-voltronic-axpert-mppsolar-pip-voltacon-effekta-etc-and-interface-with-home-assistant-via-mqtt-works-with-rs232-usb/119053/499?u=byte4geek