diff --git a/main.py b/main.py
index 919947c..982168f 100644
--- a/main.py
+++ b/main.py
@@ -81,6 +81,8 @@ class Sensor():
     bad_keys = []
     last_update = None
     update_period = None
+    skip_if_hasnt_changed = False
+    skip_cooldown = 1.0
 
     def __init__(self, id_, name):
         self.id_ = id_
@@ -103,7 +105,15 @@ class Sensor():
         return str(before) != str(after)
 
     def log(self):
-        if not self.value or not self.changed():
+        if not self.value:
+            return
+
+        if not self.changed() and self.skip_if_hasnt_changed:
+            logging.debug('Skipping writing %s, data hasn\'t changed', self)
+            return
+
+        if self.last_update and self.skip_cooldown and time.time() - self.last_update < self.skip_cooldown:
+            logging.debug('Skipping writing %s, cooldown limit', self)
             return
 
         data = self.value.copy()
@@ -146,10 +156,10 @@ class Sensor():
                 self.last_update = time.time()
 
     def update(self, data):
-        self.last_update = time.time()
         self.prev_value = self.value
         self.value = data
         self.log()
+        self.last_update = time.time()
 
     async def poll(self):
         return
@@ -168,6 +178,7 @@ class ThermostatSensor(Sensor):
         'dehum_setpoint'
     ]
     update_period = 300
+    skip_if_hasnt_changed = True
 
     def __init__(self, id_, ip, name):
         self.id_ = id_
@@ -200,6 +211,7 @@ class OwnTracksSensor(Sensor):
         'created_at',
     ]
     update_period = 90
+    skip_cooldown = False
 
 class DustSensor(Sensor):
     type_ = 'dust'
@@ -237,6 +249,18 @@ class SleepSensor(Sensor):
             except TypeError:
                 pass
 
+class SoilSensor(Sensor):
+    type_ = 'soil'
+    update_period = 90
+
+    def transform(self, data):
+        for key, value in data.items():
+            # what happens if you do this to a timestamp?
+            try:
+                data[key] = float(round(value, 1))
+            except TypeError:
+                pass
+
 class SolarSensor(Sensor):
     type_ = 'solar'
 
@@ -434,6 +458,9 @@ async def history(request):
     elif measurement == 'air':
         client = sensors_client
         q = 'select max("pm10") as max_p10, max("pm25") as max_p25, max("co2") as max_co2, max("voc_idx") as max_voc from air where "name" = \'{}\' and time >= {}s and time < {}s group by time({}) fill(linear)'.format(name, start, end, window)
+    elif measurement == 'soil':
+        client = sensors_client
+        q = 'select mean("soil") as soil from soil where "name" = \'{}\' and time >= {}s and time < {}s group by time({}) fill(linear)'.format(name, start, end, window)
     elif measurement == 'lux':
         client = sensors_client
         q = 'select mean("lux") as lux from air where "name" = \'{}\' and time >= {}s and time < {}s group by time({}) fill(linear)'.format(name, start, end, window)
@@ -515,6 +542,8 @@ if __name__ == '__main__':
     sensors.add(ERTSCMSensor('78628180', 'Gas'))
     sensors.add(OwnTracksSensor('owntracks1', 'OwnTracks'))
     sensors.add(AirSensor('air1', 'Living Room'))
+    sensors.add(AirSensor('air2', 'Bedroom'))
+    sensors.add(AirSensor('air3', 'Kitchen'))
     sensors.add(Acurite606TX('185', 'Outside', 0.0))
     sensors.add(AcuRite6002RM('999999', 'Seeds', 0.0))     # A
     sensors.add(AcuRite6002RM('999998', 'Misc', 0.7, -1.0))     # A
@@ -523,6 +552,7 @@ if __name__ == '__main__':
     sensors.add(AcuRite6002RM('11087', 'Bedroom', -0.7, 1.0)) # C
     sensors.add(SleepSensor('sleep1', 'Bedroom'))
     sensors.add(SolarSensor('solar', 'Solar'))
+    sensors.add(SoilSensor('soil1', 'Dumb Cane'))
 
     sensors.add(QotMotionSensor('qot_dc3c', 'Bedroom'))
     sensors.add(QotMotionSensor('qot_88c3', 'Lower Stairs Hi'))