[Nut-upsuser] APC SC 450 serial connection

Philippe LeCavalier support at plecavalier.com
Thu Apr 21 17:23:09 BST 2022

I'm trying to connect my debian box to an apc smart-ups SC 450 with serial
port only. The debian box has a serial male port. I' got nut-server and
client installed put dumb as the driver.

Debian 10.7
nut-server 2.7.4-8

        driver = dumb
        port = /dev/ttyS0
        cable = 940-0024E
00:02: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A

I also bought a cable with a FTDI chip which Debian sees as ttyUSB0 but
that isn't working either.

All I ever get is Driver not connected.

Thanks, Phil
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