Wire the HC-SR04 ultrasonic sensor to the ESP32 as shown in the following schematic diagram. We’re connecting the Trig pin to GPIO 2 and the Echo pin to GPIO 1, but you can use any other suitable pins ...
"Smart Blind Stick prototype using Arduino, ultrasonic sensing, and buzzer alerts to help visually impaired users detect nearby obstacles. Lightweight PVC design, rechargeable power unit, and ...
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