Ar135

Problem resolved, after the reset the Modbus SN was changed to 00, changed it to 01, restarted the inverter and all readings are back to normal.

Thanks for this! This solved my issue too!

I had the same issue, remove the VCC from the esp32 and it worked. 
check here: 
 

I followed @Sc00bs video and got it working, and it's been working for a while, today I updated ESPHome to 2023.9.0 and it broke!
I now keep getting this:
I've reverted ESPHome to 2023.8.3 and reloaded the board, and it's still not reading, doesn't make sense! 
Next step is to revert Home Assistant to a previous backup. (Will advise if that fixes it)
Anyone have any ideas what to look for?

I Fixed it! (sort of)
Somehow the connections on the RS485 board came loose, so I reconnected it and it's reading again!
Here's my connections
 


Black wire is GND
Blue is Pin5 > RE
Yellow is RX > R0
Green is TX >DI
Code on the ESP32 - 
uart: id: mod_bus tx_pin: GPIO1 rx_pin: GPIO3 baud_rate: 9600 stop_bits: 1   modbus: id: deye_modbus flow_control_pin: GPIO5

You allways need GND/Neg this is the reference point. 
 
There are various open copies floating around... but imho they are pretty much a verbatim copy of the nodered flows, lots of things need fixing on them, maybe @slipx fixed some of the issues in his version? I haven't looked in months since I built my own version, maybe I'll opensource it once recouped the sunken costs
I believe there are links and code snippets in this thread
 

@Ar135 Most inverters seem to use pretty much the same modbus register, the only significant  differences are between the 3-phase and single phase inverters mostly on the grid & load side for pretty obvious reasons.
You can use the files from @slipx's Github page and he has a file for the Sunsynk single and 3 phase inverters, that works on the Deye's as well. 
For interest sakes, there is a standard for inverter communications that a lot of the manufacturers, include DEYE, have signed up for
https://sunspec.org/sunspec-modbus-specifications/
.So it is not only Sunsynk and DEYE that these integrations will work with. 

Thanks for this @Ar135. Was about to give up but disconnecting the VCC I managed to get readings from the inverter (Sunsynk 5kW).

THANKS!!!!!
I swopped A & B around, but that didn't work.
What did work was the VCC cable was unplugged and it started pulling data! When i connected the VCC again it stopped!
Now the question is, do I need the GND and 5V connected on the RS485? Well I answered my own question. If I disconnect the GND I get CRC errors.
This is what it looks like now:
ESP32:
 
RS485 Front:

RS485 Back

 
Also I need to setup the correct registers and then I'm all good! Any idea who's repo I can use for the Deye 5.5KW?
I'm doing this for a 8KW next week, do you think the same connections will work?
Thanks again for the help!!!