note vis pyserial

change of timeout

diff --git a/sql-edition/servers/VendingMachine.py b/sql-edition/servers/VendingMachine.py
index 25d375b..d73eb4b 100644 (file)
--- a/sql-edition/servers/VendingMachine.py
+++ b/sql-edition/servers/VendingMachine.py
@@ -39,8 +39,13 @@ class VendingMachine:
        def await_prompt(self):
                self.wfh.flush()
                state = 1
+               timeout = 0.5
                prefix = ''
                s = ''
+               # mtearle - vending machine was dying wait for a response from
+               # the hardware, suspect it was missing characters
+               #
+               # fixed by migration to pyserial - but future good place to start
                while True:
                        try:
                                s = self.rfh.read(1)