HC-SR04 Ultrasonic Distance with ESP8266 & AskSensors IoT : https://www.hackster.io/AskSensors/hc-sr04-ultrasonic-distance-with-esp8266-asksensors-iot-e4ded9
![](https://sp-ao.shortpixel.ai/client/to_webp,q_lossless,ret_img,w_530,h_524/https://everythingesp.com/wp-content/uploads/2019/03/whatsapp_image_2018-12-08_at_17_52_30_TfCZvBNumn.j.jpeg)
HC-SR04 Ultrasonic Distance with ESP8266 & AskSensors IoT : https://www.hackster.io/AskSensors/hc-sr04-ultrasonic-distance-with-esp8266-asksensors-iot-e4ded9