====== Raspberry Pi to Control Treadmill ======

===== Install Python3 =====
<code>
apt-get install python3
</code>
===== Install WiringPi (for Python3) =====
<code>
sudo apt-get install python3-dev python3-pip
sudo pip3 install wiringpi
</code>
===== Python3 Code - treadmill.py =====
<code>
#!/usr/bin/env python3
# Must be run as root

# import wiringpi2 as wiringpi
import wiringpi as wiringpi
import time

def is_number(s):
    try:
        float(s)
        return True
    except ValueError:
        return False

wiringpi.wiringPiSetupGpio()    # using BCM GPIO numbers, only on port 18
wiringpi.pinMode(18,2)
wiringpi.pwmSetMode(0)
wiringpi.pwmSetClock(938)       # 19.2MHz/1024/938 = 20Hz, has to be 20Hz
wiringpi.pwmSetRange(1024)
wiringpi.pwmWrite(18, 0)
time0 = time.time()
t1 = time0
t2 = time0
speed = 0
sp1 = 844
sp2 = 844
distance = 0
try:
    while 1:
        t2 = time.time()
        distance = distance + speed*(t2-t1)/3600
        t1 = t2
        print('Duration: ', round((time.time()-time0)/60,2), 'Min. Speed: ', round(speed, 2), 'MPH. Distance: ', round(distance,2), 'Mi.\n')
        vin = input('Speed(0~7mph, q to quit): ')
        if is_number(vin):
            vinf = float(vin)
            if vinf<0 or vinf>7:
                print('Please enter a number between 0~7 or q to quit')
            elif vinf<0.9:
                speed = 0
                wiringpi.pwmWrite(18, 0)
            else:
                speed = vinf
                sp2 = int(873.5-58.85*speed+0.5)
                if sp1<sp2:
                    i = sp1+1
                    while i<=sp2:
                        wiringpi.pwmWrite(18, i)
                        i += 1
                        time.sleep(0.015)
                else:
                    i = sp1-1
                    while i>=sp2:
                        wiringpi.pwmWrite(18, i)
                        i -= 1
                        time.sleep(0.035)
                sp1 = sp2
        elif vin == 'q':
            break
        else:
            print('Please enter a number between 0~7, or q to quit')
except KeyboardInterrupt:
    wiringpi.pwmWrite(18, 0)
    wiringpi.pinMode(18,0)
finally:
    wiringpi.pwmWrite(18, 0)
    wiringpi.pinMode(18,0)
</code>