loblab / ultrasonic

Ultrasonic height meter

Ultrasonic Height Meter

Use Ultrasonic sensor (HC-SR04) to measure/monitor height

• Platform: Raspberry Pi (Debian 9.x), HC-SR04
• Ver: 0.1
• Updated: 10/22/2017
• Created: 10/15/2017
• Author: loblab

Ultrasonic sensor (HC-SR04)

HC-SR04 has TRIG (CH0) & ECHO (CH1) pin

distance = pluse width * sonic speed / 2

(waveform above) = 2.8924 / 1000 * 343 / 2 = 0.496 (m)

History

• 0.1 (10/22/2017) : Basic distance measurement, multi-threading