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Last active March 28, 2022 20:11
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[Tasmota] SR-04 Ultrasonic Tank Level measurement rules
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gistfile1.txt
Rule1 ON sr04#distance>0 DO Backlog var1=((((%value%*)-20)-(EM-20))/(EM-20))*-100; var2=(var1*0.01)*LT; event sendval ENDON
Rule1 + ON event#sendval DO publish tele/watertank/LEVEL %var1% ENDON ON event#sendval DO publish tele/watertank/VOLUME %var2% ENDON
Rule1 1
Replace:
-LT with the number of liters
-EM with the distance when the tank is empty.
You will get percentage (level) and number of liters, accurate starting from 60cm deep tanks.
SR-04 (water proof) is recommended for use.
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