Support for POW-HVM5.5K-48V needed

[Schekamatik]

Since some days I am trying to get data by RS232-to-TTL module (MAX3232CSE). I am not getting any response from the inverter.
I have used this example code:
https://github.com/leodesigner/powmr_comm/blob/main/src/main.cpp

The connection to esp32 was done like it is described here:
https://github.com/syssi/esphome-smg-ii

Can someone please support me?

Thank you in advance.

[leodesigner]

This is absolutely different beast, check this repo:
https://github.com/leodesigner/powmr4500_comm

[PetroPasichnyk]

I have got a POW-HVM5.5K-48V-LIP and managed to receive a quite good result with https://github.com/syssi/esphome-smg-ii
RS232-TTL MAX3232 -- ESP8266 -- Esphome -- Home assistant
Only issue was 8266 had a little memory, so, only essential sensors have been connected, approximately a half of all available.

[kevinari26]

hi, I am using POW-HVM6.2M-48V
and ESP32, I am using UART 2 (GPIO 16, 17)
I am following this schematic
the response I get always ku8MBResponseTimedOut
can you help me @leodesigner or anyone?

here is my code

ModbusMaster node;
HardwareSerial inverterSerial(2);
inverterSerial.begin(2400);
node.begin(5, inverterSerial);

uint8_t result;
result = node.readHoldingRegisters(4501, 1);
Serial.println(result);