EASun problems about esphome-pipsolar HOT 14 CLOSED

we find another way to connect - modbus through usb port directly to home assistant rp4 and manual mapping all data from this file
https://github.com/syssi/esphome-smg-ii/blob/main/esp32-example.yaml

no wiring, no soldering, no converters. only usb to usb and some code

from esphome-pipsolar.

You are receiving a local echo of the request. This isn't a real response of your inverter. It looks like your wiring isn't correct.

from esphome-pipsolar.

i tried this connection

https://photos.app.goo.gl/txGkw8yFhJcKhHF86

but maybe its a wrong way because its not rs232

i will buy max3232 and do manual wiring through D-Sub 9pol (i have internal pinout in inverter manual)

from esphome-pipsolar.

I've understood your idea now but it's hard to predict the RS232 converter on the WiFi dongle is properly powered or not. The MAX3232 solution will be easier.

from esphome-pipsolar.

Is there a difference between the MAX3222 and MAX3232? Please make sure the RS232 converter can be driven using 3.3V. There are converter chips around which require 5V and 3.3V is out of spec.

from esphome-pipsolar.

thanks. i will try to find a mistake

from esphome-pipsolar.

May be this schematics will help you to get a better idea how the data cable should look like: https://github.com/syssi/esphome-smg-ii#schematics

from esphome-pipsolar.

i use only rx-tx pins to connect because my rs232 is powered from inverter
esp32 have own power source
is this correct?

from esphome-pipsolar.

Do you have a RS232-to-TTL converter module between the inverter and your ESP? You have to convert the logic level from -12/+12V to 0/3.3V.

from esphome-pipsolar.

Could you provide a photo of your wiring?

from esphome-pipsolar.

i have a wifi dongle with cable to rs232 port in invertor
inside this dongle i found "3.3-rx-tx-gnd" pins

https://photos.app.goo.gl/XTy8T4vCptWV686V7

from esphome-pipsolar.

I assume the pin header at the PCB is an UART-TTL and not RS232. You should connect the inverter to the D-Sub 9pol connector and make sure the pinout matches.

from esphome-pipsolar.

@syssi MAX3222 is also compatible or do we need only MAX3232-based converters?

from esphome-pipsolar.

Any news here? I would like to close this issue.

from esphome-pipsolar.