As an example, an object that is 1m away will need to be 130cm for the HC-SR04 to properly detect it.
The 15° cone of direction amounts to roughly an object area of 13% of the distance it might be. Its cone of detection is roughly 15° - meaning that it can accurately predict distances at short range, but at longer ranges it has difficulty discerning small area objects from larger area objects. One final thing to note is that the HC-SR04 does not produce perfect points in space. close( 'all' ) print( 'Keyboard Interrupt' ) break flush_events() # flush for next plot else : if data = 'Radar Start' : # stard word on Arduno start_word = True # wait for Arduino to output start word print( 'Radar Starting.' ) else : continue except KeyboardInterrupt : plt.
#UBUNTU ON ARDUINO ARM EMULATOR UPDATE#
replace( ' \n ', '' ) if start_word: vals = if len(vals) r_max: dist = 0.0 # measuring more than r_max, it's likely inaccurate dists = dist if angle % 5 = 0 : # update every 5 degrees pols. decode( 'utf-8' ) # decode data to utf-8 data = (decoded_bytes.
#UBUNTU ON ARDUINO ARM EMULATOR SERIAL#
readline() # read Arduino serial data decoded_bytes = ser_bytes. pack_configure() # show toolbar if close_bool: # closes radar window plt. show() # inifinite loop, constantly updating the # 180deg radar with incoming Arduino data # start_word,stop_bool,close_bool = False, False, False while True : try : if stop_bool: # stops program fig. add_axes() close_but = Button(close_ax, 'Close Plot' ,color = '#FCFCFC' ,hovercolor = 'w' ) close_but. close( 'all' ) stop_bool = 1 close_bool = 1 close_ax = fig. on_clicked(stop_event) # button to close window def close_event (event): global stop_bool,close_bool if stop_bool: plt. add_axes() pstop = Button(prog_stop_ax, 'Stop Program' ,color = '#FCFCFC' ,hovercolor = 'w' ) pstop. bbox) # background to keep during loop # button event to stop program # def stop_event (event): global stop_bool stop_bool = 1 prog_stop_ax = fig. draw() # draw before loop axbackground = fig. pack_forget() # remove toolbar for clean presentation fig. Servo_1.attach(servo_pin) // start servo controlįor (pos = 0 pos = 0 pos -= 1) '. Servo servo_1 // servo controller (multiple can exist) int trig = 4 // trig pin for HC-SR04 int echo = 5 // echo pin for HC-SR04 int servo_pin = 3 // PWM pin for servo control int pos = 0 // servo starting position float duration,distance
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