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--- knowledge_base:programming:treadmill [2022/12/02 14:45] – removed - external edit (Unknown date) 127.0.0.1
+++ knowledge_base:programming:treadmill [2022/12/02 14:45] (current) – ↷ Page moved from knowledge_base:treadmill to knowledge_base:programming:treadmill George Wayne
@@ Line 1: / Line 1: @@
+====== 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>