AJ_SR04M_uart_mode_with_47k_resistor.yaml

# A resistor is needed on R19 pad
# Uncomment the two lines below if you want to have a web server with sensor readings
#web_server:
#  port: 80

uart:
  tx_pin: 5
  rx_pin: 4
  baud_rate: 9600
  
sensor:
  - platform: "jsn_sr04t"
    id: Distance 
    name: "Distance"
    update_interval: 1s

# this is a template function to return percentage where   25cm = 100% , 6m = 0%
  - platform: template
    name: "% Full"
    lambda: |-
      if ((id(Distance).state) <= 0.250)  {
        return 100;
      }
      else if ((id(Distance).state) >= 6.000) {
        return 0;
      } else {
        return (100 - ((id(Distance).state) - 0.250) / 5.75 * 100);
      }
    update_interval: 1s