New LG Resu 10H Prime Installation: wifi password not working

[blueman2]

I just got a new LG Resu 10H Prime battery for my solaredge installation. After getting the battery set up, I went through the process of wifi connecting to the unit. It did connect first, then went into firmware update mode. That failed. And now, I can no longer connect to WiFi. I see the SSID, but it says the password is wrong. I tried both 12345678 and the MAC + 1234. The SSID is the RDMXXXXXXXX format, so 12345678 should work.

I can get to the Web interface when I connect a cable to it, but I cannot figure out how to log into the web interface. It has a password reset option, but it asks for a PK CODE to do that. Any clues what to do next?

 

[blueman2]

Success! It turns out the first firmware updated, but when it did, the WiFi password changed to the MAC + 1234 method. Even though the SSID is still RMDXXXXXXXXXXXXX, it required the password for the RESU_XXXXXXXXXX SSID type. Go figure,

Finished the install and all is well. But I am still curious what the log in credentials are when loging in from a Local Networks using http://xx.xx.xx.xx for the battery.

 

[daklein]

I had the same trouble. What inverter are you using it with, rs485 or CAN communication?

 

[blueman2]

rs485. SolarEdge Home Hub.

 

[daklein]

Will that use an rs485 meter to measure power to/from the grid? I just got an esphome working with mine and I'm working on logging the battery messages. I'm curious if other inverters request days differently from the LG battery.

 

[blueman2]

Will that use an rs485 meter to measure power to/from the grid? I just got an esphome working with mine and I'm working on logging the battery messages. I'm curious if other inverters request days differently from the LG battery.

Yes, if I understand what you are asking. Solaredge inverters use RS485 to talk to all devices (batteries, CT clamp power, other inverters, etc). The nice thing for Solaredge is that it also supports MODBUS over TCP so that you can query it for all data that is transmitted over the RS485 bus using the Sun-spec format over Ethernet connection. For measuring power to/from the grid (export/import), you can use a 3rd party CT-RS485 device or the one supplied by SolarEdge in all new Home Hub inverters.

 

[Sipneat]

@blueman2 I am having the same issue, love that you sorted out it was the MAC address, now my issues is, WHAT/WHERE do I find the MAC address? Is it part of the SSID? Thanks in advance!!!

I got it!!!