I have ultrasonic sensor (sensor1) connected to an ESP8266 and another ultrasound sensor connected to an ESP8266 (sensor 2) and a Raspberry PI on the same WIFI network. When the distance detected by the sensor 2 is less than 30 cm, a movie starts on the RPI. I want that if a person passes in front of sensor 1 and then in front of sensor 2 the movie should not start. I want to use MQTT.
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