diff --git a/shroom_controller.py b/shroom_controller.py
index b661aef..441188b 100644
--- a/shroom_controller.py
+++ b/shroom_controller.py
@@ -136,10 +136,11 @@ class Humidifier:
 
 # the wiring's a little different so the thresholds for detecting on/off are inverted but hopefully a lot more reliable than the original
 class HumidifierV2:
-  def __init__(self):
+  def __init__(self, toggle_cmd=b"i"):
     self.on_threshold = 1.5
     self.off_threshold = 2.5
     self.toggle_cooldown = 7
+    self.toggle_command = toggle_cmd
 
     self._on = False
     self.history = np.zeros(10)
@@ -179,7 +180,7 @@ class HumidifierV2:
 
   def toggle(self, s):
     if time.time() > self.switch_timeout:
-      s.write(b"i")
+      s.write(self.toggle_command)
       s.flush()
       self.switch_timeout = time.time() + self.toggle_cooldown
 
@@ -223,6 +224,7 @@ class Controller:
     if self.manual_mode and time.time() > self.manual_timeout:
       self.manual_mode = False
 
+    # TODO add in support for manual control of second humidifier
     if self.manual_mode:
       if humidifier.off and self.manual_on:
         humidifier.toggle(s)
@@ -240,7 +242,7 @@ class Controller:
         if humidifier2.on:
           humidifier2.toggle(s)
 
-humidifier = Humidifier()
+humidifier = HumidifierV2(b"n")
 humidifier2 = HumidifierV2()
 controller = Controller()