diff --git a/mqtt_sensord/mqtt_sensord.py b/mqtt_sensord/mqtt_sensord.py
index ecfee5b..5d5c321 100755
--- a/mqtt_sensord/mqtt_sensord.py
+++ b/mqtt_sensord/mqtt_sensord.py
@@ -1,18 +1,27 @@
 #!/usr/bin/env python3
-import argparse
 import sys
 import time
 
-from . import sensorlib
-from .mqttlib import MQTTClient
+if sys.implementation.name != 'micropython':
+    import argparse
+    from . import sensorlib
+    from .mqttlib import MQTTClient
+else:
+    import sensorlib
+    from mqttlib import MQTTClient
 
 
 def main():
-    parser = argparse.ArgumentParser()
-    parser.add_argument("-c", "--config", default="/etc/mqtt-sensord.conf")
-    args = parser.parse_args()
+    if sys.implementation.name != 'micropython':
+        parser = argparse.ArgumentParser()
+        parser.add_argument("-c", "--config", default="/etc/mqtt-sensord.conf")
+        args = parser.parse_args()
+        config_path = args.config
+    else:
+        # most probably on micropython
+        config_path = "mqtt-sensord.conf"
 
-    config = sensorlib.load_config(args.config)
+    config = sensorlib.load_config(config_path)
     sensorlib.Sensor.configure(config['host']['name'], sys.platform)
 
     mcfg = config['mqtt']
diff --git a/mqtt_sensord/mqttlib/__init__.py b/mqtt_sensord/mqttlib/__init__.py
index 7e6fc64..4244938 100644
--- a/mqtt_sensord/mqttlib/__init__.py
+++ b/mqtt_sensord/mqttlib/__init__.py
@@ -1,7 +1,7 @@
 import sys
 
-if sys.implementation == 'micropython':
-    from esp import MQTTClient
+if sys.implementation.name == 'micropython':
+    from .esp import MQTTClient
 else:
     from .paho_mqtt import MQTTClient
 
diff --git a/mqtt_sensord/sensorlib/__init__.py b/mqtt_sensord/sensorlib/__init__.py
index 59cb366..1a0664c 100644
--- a/mqtt_sensord/sensorlib/__init__.py
+++ b/mqtt_sensord/sensorlib/__init__.py
@@ -3,9 +3,8 @@ import sys
 from .base import Sensor
 from .config import load_config
 
-if sys.implementation == 'micropython':
+if sys.implementation.name == 'micropython':
     from .esp_sensors import *
 elif getattr(sys.implementation, '_multiarch') == 'arm-linux-gnueabihf':
     from .pi_sensors import *
 from .misc_sensors import *
-
diff --git a/mqtt_sensord/sensorlib/esp_sensors.py b/mqtt_sensord/sensorlib/esp_sensors.py
index 59393c7..45f13ac 100644
--- a/mqtt_sensord/sensorlib/esp_sensors.py
+++ b/mqtt_sensord/sensorlib/esp_sensors.py
@@ -4,9 +4,10 @@ import machine
 import onewire
 import time
 
-from .base import Sensor
+from .base import Sensor, sensor
 
 
+@sensor
 class DS18B20(Sensor):
     sensor_class = 'esp-ds18b20'
 
@@ -21,17 +22,17 @@ class DS18B20(Sensor):
         self.ds.convert_temp()
         time.sleep(0.1)
         return {"temp": self.ds.read_temp(self.sID)}
-Sensor.register(DS18B20)
 
 
+@sensor
 class DHT(Sensor):
     sensor_class = 'esp-dht'
 
     def __init__(self, **sensor_conf):
         super(DHT, self).__init__(**sensor_conf)
-        if sensor_conf["type"] == "dht11":
+        if sensor_conf["dht_type"] == "dht11":
             self.dht = dht.DHT11(machine.Pin(self.pin))
-        elif sensor_conf["type"] == "dht22":
+        elif sensor_conf["dht_type"] == "dht22":
             self.dht = dht.DHT22(machine.Pin(self.pin))
         else:
             raise ValueError("Unknown type")
@@ -40,4 +41,3 @@ class DHT(Sensor):
         self.dht.measure()
         time.sleep(0.1)
         return {"temp": self.dht.temperature(), "humidity": self.dht.humidity()}
-Sensor.register(DHT)
diff --git a/mqtt_sensord/sensorlib/misc_sensors.py b/mqtt_sensord/sensorlib/misc_sensors.py
index e92b296..20b38e4 100644
--- a/mqtt_sensord/sensorlib/misc_sensors.py
+++ b/mqtt_sensord/sensorlib/misc_sensors.py
@@ -1,10 +1,15 @@
-import fcntl
 import random
-import threading
 import time
 
 from .base import Sensor, sensor
 
+try:
+    import fcntl
+    import threading
+    CO2_IMPORTS = True
+except ImportError:
+    CO2_IMPORTS = False
+
 
 @sensor
 class FakeSensor(Sensor):
@@ -28,6 +33,9 @@ class CO2Meter(Sensor):
     def __init__(self, dev_path, **sensor_conf):
         super(CO2Meter, self).__init__(**sensor_conf)
 
+        if not CO2_IMPORTS:
+            raise RuntimeError("Missing threading or fnctl to run this sensor")
+
         self.dev_path = dev_path
         self.key = b'\x11\x11\x11\x11\x11\x11\x11\x11'
         self._dev = None
@@ -91,9 +99,9 @@ class CO2Meter(Sensor):
                 print("Device error: {} - trying to reopen".format(e))
                 self.values = {}
                 try:
-                     self._dev.close()
+                    self._dev.close()
                 except Exception:
-                        pass
+                    pass
                 while self._dev.closed:
                     time.sleep(1)
                     try:
@@ -101,7 +109,6 @@ class CO2Meter(Sensor):
                     except (IOError, OSError) as e:
                         print("Device error: {} - trying to reopen".format(e))
 
-
     def get_co2(self):
         if 0x50 in self.values:
             return self.values[0x50]
@@ -123,7 +130,6 @@ class CO2Meter(Sensor):
 
 if __name__ == '__main__':
     import argparse
-    import time
 
     parser = argparse.ArgumentParser()
     parser.add_argument("device", help="Device do read from")