Create pump.py

scripts/pump.py

@@ -0,0 +1,41 @@
+#!/usr/bin/env python
+from adafruit_motor import stepper
+from adafruit_motorkit import MotorKit
+from time import sleep
+
+import sys
+
+vol = int(sys.argv[1])
+flowrate = float(sys.argv[2])
+dir = str(sys.argv[3])
+
+kit = MotorKit()
+
+pump_stepper = kit.stepper2
+
+pump_stepper.release()
+
+def pump(vol, flowrate, dir):
+    
+    if dir == "foward":
+        dir=stepper.FORWARD
+    if dir == "backward":
+        dir=stepper.BACKWARD
+        
+    nb_step=vol*507 #if sleep(0.05) in between 2 steps
+    #35000steps for 69g
+    
+    #nb_step=vol*460 if sleep(0) in between 2 steps
+    duration=(vol*60)/flowrate
+    
+    delay=(duration/nb_step)-0.005
+    
+    for i in range(nb_step):
+        pump_stepper.onestep(direction=dir, style=stepper.DOUBLE)
+        sleep(delay)
+        
+    sleep(1)
+    pump_stepper.release()
+    
+#volume, flowrate (from 0 to 20), direction (foward or backward)
+pump(vol, flowrate, dir)