hc-SR04 & Power supply

Hello,

I have just bought a Wemos Mini D1 Lite & HC-SR04 that I am trying to configure.

I followed this tutorial http://www.likecircuit.com/iot-distance-sensor-hc-sr04-wemos-d1-mini/ but the distance remains at zero.

I tested a smartphone power supply (5V) and USB with the port of Wemos but same problem.

Should I use a power supply dedicated to HC-SR04?

Thanks :slight_smile: