Closed cliffdude closed 2 years ago
You can try this minimal python test. There is a binary command that should read register from inverter.
import serial import binascii port = '/dev/tty.usbserial-14310' serial_comunication = serial.Serial(port, baudrate=57600, timeout=0.75) serial_comunication.write(b'\x01\x03\x00\x00\x00\x01\x84\x0a') answer = serial_comunication.read(255) serial_comunication.close() print binascii.hexlify(bytearray(answer))
Hi thank you for your help and sorry for the late reply. Do you mean run the code on the ESP-07 via telnet or would I need to connect to the inverter with a PC or Rpi in order to run the python code?
Update: I have tried connecting the ESP-07+rs485 to a USB to rs485 adapter on my computer and run some modbus software, I can see the RX light flash and the TX also flashes at the defined interval of 10s. I cannot however get a response from the inverter to the PC or to the ESP so it looks like the problem is the inverter or I am missing something? The RS485 logo on the inverter display now stays on when the ESP is plugged in and polling for data but I get no response or activity on the RX led. Model is a HYD-4000-ES so maybe things are not the same as the models listed here. I really wanted this to work!!
There is huge chance that registers are different and request to retrieve data should be different. Have you seen other software/source code which support this inverter? You can link for analysis if any exists.
Yes that is the conclusion I came to as well although I could not diagnose it properly. I have an RS485 to RS232 that I tried to connect to a PC and read the registers without success. I think I just do not know enough about modbus to get it working. I have since found a solution on github "cmcgerty/Sofar2MQTT" this works well. Perhaps you can take a look and find out what is the difference.
Try to use ESPHome approach, there is seamless integration with HA or Tasmota approach if you are not using HA.
Thank your work on this. Is there a way to test if the rs485 is working, and what would the baud rate be at the serial port to check comms with the uart to ttl adapter? My setup: I have the ESP-07 and an aliexpress rs485 adapter like the one in the photo, my inverter is a little different as the connection is a terminal block type not rj45. When I reset the ESP-07 I get an rs485 symbol on the display of the inverter but it goes out after a short time and I get nothing over MQTT. I am not sure if my adapter is ok or if something is not correct with programming of the ESP. Web interface is working and I can configure the device, I can also connect to the telnet.