HC-SR04 Sonar Distance Sensor Methods

set_pin_mode_sonar

 def set_pin_mode_sonar(self, trigger_pin, echo_pin, callback=None)

    :param trigger_pin: Sensor trigger gpio pin

    :param echo_pin: Sensor echo gpio pin

    :param callback: callback

    callback returns a data list:

    [ SONAR_DISTANCE, trigger_pin, distance_value, time_stamp]

    SONAR_DISTANCE = 11

A maximum of 4 HC-SR04 type devices is supported. Reporting will immediately begin when this method is invoked.

Example: hc_sr04.py

Example Sample Output (example modified for a single sensor):

TelemetrixRpiPicoAio:  Version 1.0

Copyright (c) 2021 Alan Yorinks All Rights Reserved.

Opening all potential serial ports...
    /dev/ttyACM0
Retrieving pico ID...
Pico Unique ID: [230, 96, 88, 56, 131, 120, 0, 0]
Telemetrix4RPiPico Version Number: 1.0
2021-05-04 17:18:52  Trigger Pin::  16   Distance(cm):  32.06
2021-05-04 17:18:52  Trigger Pin::  16   Distance(cm):  32.06
2021-05-04 17:18:52  Trigger Pin::  16   Distance(cm):  31.17
2021-05-04 17:18:52  Trigger Pin::  16   Distance(cm):  30.22