I’ve installed an ET112 about 80 Meters away from the Easy Solar GX 2 unit and I have followed the docs but the device does not show up in Settings > Energy Meters
I’m using the Victron RS485 <> USB.
I followed the wiring diagram as 2.2.1
Orange = Data +
Yellow = Data -
Black = GND
I’ve checked with a multimeter:
Data + is 3V
Data - is 1V
GND is well, erm, GND…
Do these voltages seem right/wrong to anyone? I’m mindful I might not have used a twisted pair for Data+ and Data-…
Since the output of dbus -y | grep modbus only shows Modbus TCP (com.victronenergy.modbusclient.tcp and com.victronenergy.modbustcp), this confirms that Modbus RTU is not supported natively on your EasySolar GX 2.
What This Means
Your RS485 adapter is being recognized by the system (/dev/ttyUSBX), but Venus OS does not support Modbus RTU directly on your device.
So I can’t use the ET112?! I have a feeling ChatGPT is talking nonsense here…
If you terminate do it as described in this manual
I saw all the other old posts with wiring but they really are all wrong… no need for resistors and stuff…
Only follow the victron et112 manual and if using rj 45 on the et112 use the pinout provided by carlo gavazzi on the rj45, terminator is build in the et112 see CG manual how to “activate” that with just a wire
If after this it still doesnt work, check if your usb-rs485 adapter from victron is ok by downloading the Carlo Gavazzi UCS software and hook the adapter with energy meter connected up to an usb port of a pc running that software
Are you running a short between Green and Brown OR are you using the terminator approach? I’m not using the RJ45 output on the ET112. I’ve switched over to the terminator approach as per the CG documentation and as before I have a solid green comms light but nothing is showing up in Venus.
In Remote Console Click Settings then Click I/O. Do you see an RS485 adapter?