March 2019
Intermediate to advanced
312 pages
7h 37m
English
Content preview from Hands-On Robotics Programming with C++
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
Start your free trial
Wiring the ultrasonic sensor to the Raspberry Pi
The HC-SRO4 sensor consists of four pins: VCC, GND, trigger (Trig), and echo, so the wiring connections of the RPi and the ultrasonic sensor should be as follows:
- Connect the VCC pin of the sensor to pin number 4.
- Connect the GND pin of the sensor to pin number 9.
- Connect the Trig pin of the sensor to wiringPi pin number 12.
- The echo pin of the sensor is connected to wiringPi pin number 13 via a voltage divider. The two resistors used in the voltage divider circuit have a resistance value of 1 KΩ (R1) and 2KΩ (R2), respectively. The voltage divider circuit is used to reduce the incoming 5V signal from the echo pin (to the RPi) to 3.3V. The wiring connection of RPi and HC-SR04 is shown in the ...