Thanks for your project! I am new to raspberry and met some trouble when deploying your project:
it says device "/dev/ttyUSB0": no such file or directory when start stack,how can i solve it?

When I start the script I get the following errors:

Command
python3 pylon_to_mqtt.py --pylon_port /dev/serial/by-id/usb-FTDI_FT232R_USB_UART_B0001B3W-if00-port0 --baud_rate 9600 --mqtt_host [MY_IP] --mqtt_port [;MY_PORT] --mqtt_root SmartHome/Jakiper

Error message:
Traceback (most recent call last):
File "pylon_to_mqtt.py", line 1, in
from paho.mqtt import client as mqttclient, error_string
ImportError: cannot import name 'error_string' from 'paho.mqtt' (/home/pi/.local/lib/python3.7/site-packages/paho/mqtt/init.py)

I don't know what I am doing wrong. I flashed the ESP32 twice already. Connected RS323-TTL adapter, connected Pace BMS via RS323. However, I only ever get "Online" on PylonToMQTT/LVTOPSUN/tele/LWT (LVTOPSUN is the name of my battery that has a Pace BMS in it sending Pylon formatted data). The Pace BMS is the same as in the Jakiper batteries. Do not get any other data. Even using MQTT Explorer to listen. Using Mosquitto broker in Home Assistant.

What data should I receive with battery disconnected?

Hi! First thing congratulations for this great project! As far as I know your software is for Jakiper but it will work with a Pylontech US2000B, isn't it?

I am trying to communicate my Raspberry 3B+ with my rack of 2 Pylontech US2000B by console port (RS232) using your software. Previously I had used ICC to communicate with my batteries, and batteryview software also works, so I think my cable is working perfectly.

I have tried your software as mentioned in point 4 of your wiki (Adding PylonToMQTT to an existing system). I have tried command line and docker container with the same result. It publish only a topic in my MQTT server, /PylonToMQTT/Main/tele/LWT=Online, but nothing more, and logut this error:

023-04-04 08:16:47,503:INFO:PylonToMQTT:pylon_mqtt starting up... 2023-04-04 08:16:47,535:INFO:PylonToMQTT:pylonPort = /dev/ttyUSB0 2023-04-04 08:16:47,536:INFO:PylonToMQTT:baud_rate = 9600 2023-04-04 08:16:47,537:INFO:PylonToMQTT:rackName = Main 2023-04-04 08:16:47,537:INFO:PylonToMQTT:mqttHost = 192.168.2.245 2023-04-04 08:16:47,538:INFO:PylonToMQTT:mqttPort = 1883 2023-04-04 08:16:47,538:INFO:PylonToMQTT:mqttRoot = PylonToMQTT 2023-04-04 08:16:47,539:INFO:PylonToMQTT:mqttUser = tomascrespo 2023-04-04 08:16:47,539:INFO:PylonToMQTT:mqttPassword = ********** 2023-04-04 08:16:47,540:INFO:PylonToMQTT:publishRate = 5 2023-04-04 08:16:47,540:INFO:PylonToMQTT:sok = False 2023-04-04 08:16:47,541:INFO:PylonToMQTT:Connecting with clientId=tomascrespo_mqttclient_267 2023-04-04 08:16:47,542:INFO:PylonToMQTT:Connecting to MQTT 192.168.2.245:1883 2023-04-04 08:16:47,546:INFO:PylonToMQTT:MQTT connected OK Returned code=0 2023-04-04 08:16:47,547:INFO:PylonToMQTT:Subscribed to PylonToMQTT/Main/cmnd/# 2023-04-04 08:16:58,389:ERROR:PylonToMQTT:Failed to process response! 2023-04-04 08:16:58,390:ERROR:PylonToMQTT:invalid literal for int() with base 16: b'\x00\x80\x80\x80' Traceback (most recent call last): File "pylon_to_mqtt.py", line 235, in periodic number_of_packs = pylontech.get_pack_count().PackCount File "/support/pylontech.py", line 149, in get_pack_count f = self.read_frame() File "/support/pylontech.py", line 143, in read_frame f = self._decode_hw_frame(raw_frame=raw_frame) File "/support/pylontech.py", line 127, in _decode_hw_frame assert got_frame_checksum == int(frame_chksum, 16) ValueError: invalid literal for int() with base 16: b'\x00\x80\x80\x80' 2023-04-04 08:17:09,418:ERROR:PylonToMQTT:Failed to process response! 2023-04-04 08:17:09,418:ERROR:PylonToMQTT:invalid literal for int() with base 16: b'\x00\x80\x80\x80'

Any clue?

Hi,
first of all, many thanks for this project and your efforts.
Basically I just want to let you know that the MAX232 rx / tx are wired up wrong in the given image, at least with the two MAX232 I have tested.
The MAXs RX PIN needs to be connected the RX PIN of the ESP32, same for the TX Pin.
The normally used tx -> rx connections applies not to the input of the MAX.

Hope this helps.

Every command to a battery takes 5 seconds because you use readline(). Every response from a battery ends with CR, not LF. Wouldn't it be better to use read_until(b'\r') instead?

That said, I have learned a lot from your project because of its completeness. Thank you!

I now find data from Pack1 in Mosquitto.
How do I also get Pack2? What am I missing?