After releasing pull pressure. Create vacuum for a bríef moment, then pull...

After releasing pull pressure. Create vacuum for a bríef moment, then pull with a very low force to prevent overheating when vacuum is created

send2arduino.py

 import serial
 import time
 
-
-TEST_VALUE = 1000
+# max 1024
+TEST_VALUE = 100
+# a very low value to pull in an unnoticable way
+REST_VALUE = 1
 SLEEP_SEC = 5
 
 # com port for arduiono usb
@@ -23,6 +25,14 @@ try:
     arg = bytes(str(int(-TEST_VALUE)), 'utf8','ignore') + b'\r'
     # send to arduino serial
     my_serial.write(arg)
+    # hold that value for SLEEP_SEC
+    time.sleep(SLEEP_SEC) 
+    # negative creates constant vacuum and that overheats one part
+    # therefore, send very low value to pull in an unnoticable way
+    arg = bytes(str(int(REST_VALUE)), 'utf8','ignore') + b'\r'
+    # send to arduino serial
+    my_serial.write(arg)
+
 
 except:
     print("Problem finding device.\nCheck your com port or device.")