ISolar SMP 5KW aka Axpert / PIP5048 inverter rs232 port communication

ESPHome
1

Hello All!

Seems I have read a lot of topics related to how to comunicate with these inverters but I cannot connect to my inverter via rs232 port…

Im able to connect with WatchPower with db9 rs232->usb cable as well as wifimonitor mobile app wirelessly.
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I asked producer for rs232 communication protocol - I got document with commands like esphome integration:

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I try to use esphome integration https://github.com/syssi/esphome-pipsolar but with no success.
Im getting timeouts

[17:30:16][D][pipsolar:838]: Sending polling command : QPIGS with length 5
[17:30:21][D][pipsolar:755]: timeout command to poll: QPIGS

What is a bit different that my inverter have only db9 port marked as ‘com port’ and rj45 port for bms (attached manual says its bms rs232/rs485)

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I try with esp32 and rs232 to uart converter like:

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I also tried to revers rx tx pins but still not working…

Any ideas? Mayby should I check with available rj45 port?
Have anyone successfull connected to similar inverter?

1 Like
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Did you find a solution to this? I have the exact same inverter as pictured, i also have the same issues you described with the timeout on QPIGS retrieval. the QPIRI command works and i can receive configuration data from the inverter, however i get timeouts on the QPIGS like you for status data.
I did read in one of the MPP commands guides that the 48v version of the MPP solar uses the command QPIGS2, not QPIGS, so i am attempting to modify my build files to use this, however so far have not had much luck, if i modify the pisolar.cpp file, then install it to the ESP32, when i come back to check the pipsolar.cpp file it has reverted my changes, please let me know if you were able to solve this.

3

Hi, finally I left this idea. Right now Im using solar assistant (https://solar-assistant.io/ )and mqtt HA integration.

4

Hello,

Somobody resolved problem ? I have the same solar inwerter and the same problem .

5

Hello, I have a similar inverter, but from the Effecta AX-P1 brand, which does not have RS232 but USB2.0 type B, what do I need to connect it to the ESP32

Well thank you.