AJ_SR04M_no_resistor.yaml

# Uncomment the two lines below if you want to have a web server with sensor readings
#web_server:
#  port: 80

sensor:
  - platform: ultrasonic
    id: Distance 
    trigger_pin: 5
    echo_pin: 4
    name: "Distance"
    update_interval: 1s
    pulse_time: 20us
    timeout: 6m

# this is a template function to return percentage where  20cm = 100% , 6m = 0%
  - platform: template
    name: "% Full"
    lambda: |-
      if ((id(Distance).state) <= 0.200)  {
        return 100;
      }
      else if ((id(Distance).state) >= 6.000) {
        return 0;
      } else {
        return (100 - ((id(Distance).state) - 0.200) / 5.80 * 100);
      }
    update_interval: 1s