WIP

config/battery.lua

@@ -0,0 +1,41 @@
+local ntfy = require("config.ntfy")
+
+local module = {}
+
+--- @type {[string]: number}
+local low_battery = {}
+
+--- @param device DeviceInterface
+--- @param battery number
+function module.callback(device, battery)
+	local id = device:get_id()
+	if battery < 15 then
+		print("Device '" .. id .. "' has low battery: " .. tostring(battery))
+		low_battery[id] = battery
+	else
+		low_battery[id] = nil
+	end
+end
+
+function module.notify_low_battery()
+	-- Don't send notifications if there are now devices with low battery
+	if next(low_battery) == nil then
+		print("No devices with low battery")
+		return
+	end
+
+	local lines = {}
+	for name, battery in pairs(low_battery) do
+		table.insert(lines, name .. ": " .. tostring(battery) .. "%")
+	end
+	local message = table.concat(lines, "\n")
+
+	ntfy.device:send_notification({
+		title = "Low battery",
+		message = message,
+		tags = { "battery" },
+		priority = "default",
+	})
+end
+
+return module