Dead man's switch for RPi connected via Tasmota controlled switch

tasmota-dms.sh

#!/bin/bash
# Dead man's switch for Tasmota
# Presmues that timers has been enabled

# Continuously move the restart timers forward
read -r day hour <<< $(date -d "+2 hours" +"%u %H")

# Convert date output where Monday is 1 to timer format where Sunday is 1
day=$((day%7+1))

# Week schedule string
dayvar=$(echo '0000000' | sed s/0/1/$day)

# Turn off
timer1="{\"Enable\":1,\"Mode\":0,\"Time\":\"$hour:05\",\"Window\":0,\"Days\":\"$dayvar\",\"Repeat\":0,\"Output\":1,\"Action\":0}"

# Turn on
timer2="{\"Enable\":1,\"Mode\":0,\"Time\":\"$hour:06\",\"Window\":0,\"Days\":\"$dayvar\",\"Repeat\":0,\"Output\":1,\"Action\":1}"
#echo $timer1
#echo $timer2

mosquitto_pub -h localhost -t 'cmnd/tasmota_F795A8/Timer1' -m $timer1
mosquitto_pub -h localhost -t 'cmnd/tasmota_F795A8/Timer2' -m $timer2