ESP8266 NodeMCU HC-SR04 Ultrasonic Sensor with Arduino IDE | Random Nerd Tutorials
Thief Detector Using Ultrasonic and NodeMCU : 5 Steps - Instructables
GitHub - SaiHari-N/Ultrasonic-based-Blind-Stick-using-NodeMCU: One of the many challenges that blind people face in life is navigating the streets. On the street, there are numerous vehicles and obstructions that could harm them. Therefore,
NodeMCU with ultrasonic sensor never wake up - Project Guidance - Arduino Forum