From e918c6ccbcfe19c73cffbdecac2e2ea10479e7e0 Mon Sep 17 00:00:00 2001
From: Tim Keller <tjk@tjkeller.xyz>
Date: Thu, 21 May 2026 22:55:23 -0500
Subject: office ups experimental setup

---
 hosts/hp-envy-office/ups.nix | 85 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 hosts/hp-envy-office/ups.nix

diff --git a/hosts/hp-envy-office/ups.nix b/hosts/hp-envy-office/ups.nix
new file mode 100644
index 0000000..8af0bcd
--- /dev/null
+++ b/hosts/hp-envy-office/ups.nix
@@ -0,0 +1,85 @@
+let
+	passwordFile = builtins.toFile "password" "password";
+in {
+	power.ups = {
+		enable = true;
+		ups."UPS-1" = {
+			driver = "usbhid-ups";
+			port = "auto";
+			directives = [
+				"offdelay = 360"
+				"ondelay = 370"
+				"lowbatt = 40"
+				"ignorelb"
+			];
+		};
+		upsd = {
+			listen = [
+				{
+					address = "127.0.0.1";
+					port = 3493;
+				}
+				{
+					address = "::1";
+					port = 3493;
+				}
+			];
+		};
+		users."nut-admin" = {
+			# A file that contains just the password.
+			inherit passwordFile;
+			upsmon = "primary";
+		};
+		upsmon.monitor."UPS-1" = {
+			inherit passwordFile;
+			system = "UPS-1@localhost";
+			powerValue = 1;
+			user = "nut-admin";
+			type = "primary";
+		};
+		upsmon.settings = {
+			# This configuration file declares how upsmon is to handle
+			# NOTIFY events.
+
+			# POWERDOWNFLAG and SHUTDOWNCMD is provided by NixOS default
+			# values
+
+			# values provided by ConfigExamples 3.0 book
+			NOTIFYMSG = [
+				[ "ONLINE" ''"UPS %s: On line power."'' ]
+				[ "ONBATT" ''"UPS %s: On battery."'' ]
+				[ "LOWBATT" ''"UPS %s: Battery is low."'' ]
+				[ "REPLBATT" ''"UPS %s: Battery needs to be replaced."'' ]
+				[ "FSD" ''"UPS %s: Forced shutdown in progress."'' ]
+				[ "SHUTDOWN" ''"Auto logout and shutdown proceeding."'' ]
+				[ "COMMOK" ''"UPS %s: Communications (re-)established."'' ]
+				[ "COMMBAD" ''"UPS %s: Communications lost."'' ]
+				[ "NOCOMM" ''"UPS %s: Not available."'' ]
+				[ "NOPARENT" ''"upsmon parent dead, shutdown impossible."'' ]
+			];
+			NOTIFYFLAG = [
+				[ "ONLINE" "SYSLOG+WALL" ]
+				[ "ONBATT" "SYSLOG+WALL" ]
+				[ "LOWBATT" "SYSLOG+WALL" ]
+				[ "REPLBATT" "SYSLOG+WALL" ]
+				[ "FSD" "SYSLOG+WALL" ]
+				[ "SHUTDOWN" "SYSLOG+WALL" ]
+				[ "COMMOK" "SYSLOG+WALL" ]
+				[ "COMMBAD" "SYSLOG+WALL" ]
+				[ "NOCOMM" "SYSLOG+WALL" ]
+				[ "NOPARENT" "SYSLOG+WALL" ]
+			];
+			# every RBWARNTIME seconds, upsmon will generate a replace
+			# battery NOTIFY event
+			RBWARNTIME = 216000;
+			# every NOCOMMWARNTIME seconds, upsmon will generate a UPS
+			# unreachable NOTIFY event
+			NOCOMMWARNTIME = 300;
+			# after sending SHUTDOWN NOTIFY event to warn users, upsmon
+			# waits FINALDELAY seconds long before executing SHUTDOWNCMD
+			# Some UPS's don't give much warning for low battery and will
+			# require a value of 0 here for aq safe shutdown.
+			FINALDELAY = 0;
+		};
+	};
+}
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