leodesigner/powmr_comm

PowMr Inverter serial communication protocol reverse engineering

powmr_comm's Issues

Pintout and voltages from RJ45 port on POW-HVM3.2H-24V-N

I've got POW-HVM3.2H-24V-N, still waiting for the batteries, so testing it with benchtop power supply.

I'm checking the RJ45 pinout on my bench and I'm getting different outputs than from the diagram provided.

White green (1) is GND
Brown (8) is + VBat 24 V
Blue (4) is + 13.2 V

or at least that's what my multimeter says. Don't want to remove the top cover because of the tamper seal to check for the RJ45 board.

Problem with parallel model

Greetings, a big thumbs up for this project. I have an issue with inverter model POW-HVM5.5K-48V-LIP (with parallel) - according to powmr website it also supports rs232 wifi dongle however for some reason i cannot get any response from modbus protocol, i checked the rs232 connections with an multimeter - it seems to have good connection - baudrate is set to 2400 n 8 1bit, Modbus ID Setting (setting 25) is default set to 001, i used ModScan32 for protocol testing (address 0001, id 1 lenght 100) - still nothing. Could you guide me in reading registers from this device? I have some experience in reading data and sending commands via mqtt to VMIII and MAX II hybrid inverters (if someone needs help with these particular models) powmr seems to be diffrent atleast in rs232 modbus. Regards

Powmr Max 8kW support?

Is there any chance for supporting the Hybrid Inverter POW MAX 8kW as well? It's not listed above.

This is the link for the WiFi module being used.
https://powmr.com/products/owmr-wifi-module-with-rs232-remote-monitoring-solution-pow-module-wifi

Hello from PlatformIO

Hi there,

That moment when the community makes me happy. I've just googled powmr inverter protocol and saw It compiles in Platformio. 😊

Thanks for your amazing project. I'm a happy owner of a PowMr inverter and glad to connect it to my "smart-home" system.

P.S: Founder of PlatformIO 🙏

PowMr to EV Charger help needed

Hello - I need some project help connecting my PowMr through some controller (Raspberry PI, ESP, Arduino) to an EV charger. I can pay a nominal hourly fee. Are either of you available and interested?

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

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.

Split RS232 and ESP code

I have a server that is running right next to the inverter, it would be really nice to be able to connect the serial port directly to it using something like https://gitlab.com/Teuniz/RS-232.

Splitting the code into separate classes would definitely help to implement that, among other advantages.

Esp8266 power pins

Hi thank you for this great project.
i just want to clarify the hardware part little bit. you mentioned

The hardware part is simple esp8266 module with RS232 level converter attached to the
    #define SS_TX_PIN D8 // GPIO15
    #define SS_RX_PIN D7 // GPIO13

But what about v & ground pins? As i understand V pin (blue) on the RJ45 is 12v. have you used a step down circuit to make it compatible with esp8266? Also for the TX/RX do we need a logic converter?
Thanks again.

Powmr 4.5kW support?

Hello! I have
Hello! I have a Powmr POW-HVM4.5K-24V hybrid inverter. But I don’t quite understand whether this assembly will work for him or not?
https://powmr.com/products/hybrid-inveter-charger-4500w-220vac-24vdc

wifi module which is used https://powmr.com/products/powmr-wifi-module-wifi-4-5k-6-5k

PV Power from POW-HVM10.2M seems to only show one of the two PV string

Gentleman,
I have two PV strings to my inverter(4 + 4kW) , but the register 4505 seems to show only one. The same thing is on the physical display of the Inverter, where only one string at a time is showed, but clicking make it cycle and show first one and then, after some other screen, the other one.

Any idea?