From da895da6be204139b96804a60772b8362f829eaa Mon Sep 17 00:00:00 2001
From: Phil Howard <phil@gadgetoid.com>
Date: Tue, 26 May 2020 10:17:18 +0100
Subject: [PATCH] Explicitly stop pump upon exit

---
 library/grow/pump.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/library/grow/pump.py b/library/grow/pump.py
index ddcf734..5a4aa94 100644
--- a/library/grow/pump.py
+++ b/library/grow/pump.py
@@ -32,6 +32,12 @@ class Pump(object):
 
         self._timeout = None
 
+        atexit.register(self._stop)
+
+    def _stop(self):
+        self._pwm.stop(0)
+        GPIO.setup(self._gpio_pin, GPIO.IN)
+
     def set_speed(self, speed):
         """Set pump speed (PWM duty cycle)."""
         if speed > 1.0 or speed < 0: