SunFounder PiCrawler Kit - Page 47

SunFounder PiCrawler Kit
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def show_info():
print("\033[H\033[J",end='') # clear terminal windows
print(manual)
def main():
show_info()
while True:
key = readchar.readkey()
key = key.lower()
if key in('wsad'):
if 'w' == key:
crawler.do_action('forward',1,speed)
elif 's' == key:
crawler.do_action('backward',1,speed)
elif 'a' == key:
crawler.do_action('turn left',1,speed)
elif 'd' == key:
crawler.do_action('turn right',1,speed)
sleep(0.05)
show_info()
elif key == readchar.key.CTRL_C:
print("\n Quit")
break
sleep(0.02)
if __name__ == "__main__":
main()
How it works?
PiCrawler should take appropriate action based on the keyboard characters read. The lower() function converts upper
case characters into lower case characters, so that the letter remains valid regardless of case.
def main():
show_info()
while True:
key = readchar.readkey()
key = key.lower()
if key in('wsad'):
if 'w' == key:
crawler.do_action('forward',1,speed)
elif 's' == key:
crawler.do_action('backward',1,speed)
elif 'a' == key:
crawler.do_action('turn left',1,speed)
elif 'd' == key:
crawler.do_action('turn right',1,speed)
sleep(0.05)
show_info()
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3.4. Keyboard Control 43