CPU/AIO/Nvidia temperature monitoring script on Arch Linux

temps.sh

#!/bin/sh
# requires bc, lm-sensors, nvidia-smi

CPU_MODEL=$(cat /proc/cpuinfo | grep "model name" | uniq | sed 's/model name[[:space:]]*:[[:space:]]*//')
SENSORS_OUTPUT=""

# Helper functions for min/max tracking
declare -A MIN_VALUES
declare -A MAX_VALUES

function update_min_max {
	# $1: key, $2: value
	local key="$1"
	local val="$2"
	if [[ -z "${MIN_VALUES[$key]}" || $(echo "$val < ${MIN_VALUES[$key]}" | bc -l) -eq 1 ]]; then
		MIN_VALUES[$key]="$val"
	fi
	if [[ -z "${MAX_VALUES[$key]}" || $(echo "$val > ${MAX_VALUES[$key]}" | bc -l) -eq 1 ]]; then
		MAX_VALUES[$key]="$val"
	fi
}

function print_min_max {
	# $1: key, $2: unit
	echo "(min: ${MIN_VALUES[$1]}$2, max: ${MAX_VALUES[$1]}$2)"
}

function cpu_temp {
	VAL=$(echo "$SENSORS_OUTPUT" | grep -e Tccd1 | awk '{print $2}' | sed 's/+//;s/°C//')
	update_min_max "cpu_temp" "$VAL"
	echo "$CPU_MODEL"
	echo -n "  temperature: $VAL°C "
	print_min_max "cpu_temp" "°C"
}

function gpu_temp {
	POWER_LIMIT=$(nvidia-smi --query-gpu=power.limit --format=csv,noheader,nounits | head -n1)
	while IFS=, read -r name temp power; do
		temp=${temp//[!0-9]/}
		power=$(echo "$power" | sed 's/ W//')
		update_min_max "gpu_temp" "$temp"
		update_min_max "gpu_power" "$power"
		echo "$name"
		echo -n "  temperature: $temp °C "
		print_min_max "gpu_temp" " °C"
		echo -n "  power: $power W "
		echo "$(print_min_max "gpu_power" " W") (limit: $POWER_LIMIT W)"
	done < <(nvidia-smi --query-gpu=name,temperature.gpu,power.draw --format=csv,noheader)
}

function aio_temps {
	COOLANT=$(echo "$SENSORS_OUTPUT" | grep -e "Coolant temp" | awk '{print $3}' | sed 's/+//;s/°C//')
	PUMP=$(echo "$SENSORS_OUTPUT" | grep -e "Pump speed" | awk '{print $3}' | sed 's/+//;s/°C//')
	FAN=$(echo "$SENSORS_OUTPUT" | grep -e "Fan speed" | awk '{print $3}' | sed 's/+//;s/ RPM//')

	if [[ "$COOLANT" =~ ^[0-9]+(\.[0-9]+)?$ ]]; then
		update_min_max "liquid_temp" "$COOLANT"
	fi
	if [[ "$PUMP" =~ ^[0-9]+(\.[0-9]+)?$ ]]; then
		update_min_max "pump_speed" "$PUMP"
	fi
	if [[ "$FAN" =~ ^[0-9]+(\.[0-9]+)?$ ]]; then
		update_min_max "fan_speed" "$FAN"
	fi

	echo "AIO"
	echo -n "  liquid temperature: $COOLANT °C "
	print_min_max "liquid_temp" " °C"
	echo -n "  pump speed: $PUMP RPM "
	print_min_max "pump_speed" " RPM"
	echo -n "  fan speed: $FAN RPM "
	print_min_max "fan_speed" " RPM"
}


while true
do
	clear
	SENSORS_OUTPUT=$(sensors)
	cpu_temp
	echo ""
	aio_temps
	echo ""
	gpu_temp
	sleep 1
done