Emon for 3-phase PV system and house in Italy?

[Bill.Thomson]

@gadgetbazza

just need to program the USB adapters to ensure they remain consistently connected to the same serial port on reboot.

I’m guessing you mean program the device (e.g. Raspberry Pi) so it always enumerates the USB adapters to the same serial port. If that’s the case, you may want to have a look at this thread:

How to match a ttyUSBX device to a USB Serial device

By adding some rules to the /etc/udev/rules.d directory, you can force Linux to always use the same USB serial device which you can refer to by a more meaningful name. e.g. You have 2 USB-to-RS485 adapters. One is FTDI based, the other CH340 based. You want to use them both on the same Raspberry Pi to read two modbus instruments. The problem is sometimes the OS enumerates the adapters in opposite order. i.e. what was /dev/ttyUSB0 at last boot time is now /dev/ttyUSB1 and vice-versa. Adding…

BTW, nice clean installation you’ve got there.