diff --git a/code/lib/adafruit_max31865.py b/code/lib-src/adafruit_max31865.py
similarity index 96%
rename from code/lib/adafruit_max31865.py
rename to code/lib-src/adafruit_max31865.py
index fccfee4..ddf7552 100644
--- a/code/lib/adafruit_max31865.py
+++ b/code/lib-src/adafruit_max31865.py
@@ -54,7 +54,6 @@ from machine import Pin
 
 from micropython import const
 
-#import adafruit_bus_spi.spi_spi as spi_spi
 
 __version__ = "0.0.0-auto.0"
 __repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_MAX31865.git"
@@ -92,10 +91,8 @@ _RTD_B = -5.775e-7
 class MAX31865:
     """Driver for the MAX31865 thermocouple amplifier."""
 
-    def __init__(
-                self, spi, cs, *, rtd_nominal=100, ref_resistor=430.0,
-                wires=2, filter_frequency=60
-                ):
+    def __init__(self, spi, cs, *, rtd_nominal=100, ref_resistor=430.0,
+                 wires=2, filter_frequency=60.0):
         self.rtd_nominal = rtd_nominal
         self.ref_resistor = ref_resistor
         self._spi = spi
@@ -128,7 +125,7 @@ class MAX31865:
     # pylint: disable=no-member
     def _read_u8(self, address):
         # Read an 8-bit unsigned value from the specified 8-bit address.
-        buf=bytearray(1)
+        buf = bytearray(1)
         self._cs.value(0)
         self._spi.write(bytes([address & 0x7F]))
         self._spi.readinto(buf, 1)
@@ -137,7 +134,7 @@ class MAX31865:
 
     def _read_u16(self, address):
         # Read a 16-bit BE unsigned value from the specified 8-bit address.
-        buf=bytearray(2)
+        buf = bytearray(2)
         self._cs.value(0)
         self._spi.write(bytes([address & 0x7F]))
         self._spi.readinto(buf, 1)
@@ -146,7 +143,7 @@ class MAX31865:
 
     def _write_u8(self, address, val):
         # Write an 8-bit unsigned value to the specified 8-bit address.
-        buf=bytearray(2)
+        buf = bytearray(2)
         buf[0] = (address | 0x80) & 0xFF
         buf[1] = val & 0xFF
         self._cs.value(0)
@@ -157,7 +154,7 @@ class MAX31865:
 
     @property
     def bias(self):
-        """The state of the sensor's bias (True/False)."""
+        """State of the sensor's bias (True/False)."""
         return bool(self._read_u8(_MAX31865_CONFIG_REG) & _MAX31865_CONFIG_BIAS)
 
     @bias.setter
@@ -171,7 +168,7 @@ class MAX31865:
 
     @property
     def auto_convert(self):
-        """The state of the sensor's automatic conversion
+        """State of the sensor's automatic conversion
         mode (True/False).
         """
         return bool(self._read_u8(_MAX31865_CONFIG_REG) & _MAX31865_CONFIG_MODEAUTO)
diff --git a/code/lib/bme280_i2c.py b/code/lib-src/bme280_i2c.py
similarity index 100%
rename from code/lib/bme280_i2c.py
rename to code/lib-src/bme280_i2c.py
diff --git a/code/lib/umqtt/robust.py b/code/lib-src/umqtt/robust.py
similarity index 95%
rename from code/lib/umqtt/robust.py
rename to code/lib-src/umqtt/robust.py
index 7ee40e0..983834f 100644
--- a/code/lib/umqtt/robust.py
+++ b/code/lib-src/umqtt/robust.py
@@ -1,13 +1,14 @@
-import utime
+import time
 from . import simple
 
+
 class MQTTClient(simple.MQTTClient):
 
     DELAY = 2
     DEBUG = False
 
     def delay(self, i):
-        utime.sleep(self.DELAY)
+        time.sleep(self.DELAY)
 
     def log(self, in_reconnect, e):
         if self.DEBUG:
diff --git a/code/lib/umqtt/simple.py b/code/lib-src/umqtt/simple.py
similarity index 100%
rename from code/lib/umqtt/simple.py
rename to code/lib-src/umqtt/simple.py
diff --git a/code/lib/main_lib.mpy b/code/lib/main_lib.mpy
deleted file mode 100644
index 6e63a71..0000000
Binary files a/code/lib/main_lib.mpy and /dev/null differ
diff --git a/code/lib/main_lib.py b/code/lib/main_lib.py
deleted file mode 100644
index 06fb8c1..0000000
--- a/code/lib/main_lib.py
+++ /dev/null
@@ -1,40 +0,0 @@
-"""Divers fonctions utiles
-"""
-
-import time
-import machine
-import network
-from umqtt.robust import MQTTClient
-
-
-def WifiConnect(ssid, psk):
-    """Connect to the wifi with given credentials"""
-    wlan = network.WLAN(network.STA_IF)
-    wlan.active(True)
-    nets = wlan.scan()
-    for net in nets:
-        net_ssid = net[0].decode()
-        if net_ssid == ssid:
-            print('Network found!')
-            wlan.connect(net_ssid, psk)
-            while not wlan.isconnected():
-                machine.idle()  # save power while waiting
-            print('WLAN connection succeeded!')
-            break
-    if not wlan.isconnected():
-        print("WLAN not found/not connected")
-
-    return wlan
-
-def now(rtc):
-    """Return a string representing date/time now"""
-    return "{0:04d}/{1:02d}/{2:02d}_{4:02d}:{5:02d}:{6:02d}".format(*rtc.datetime())
-
-
-def MqttPublish(client, topic, message, retain=False, qos=0, sleep=10):
-    """MQTT publish helper"""
-    client.publish("test/{device}/{topic}".format(device=client.client_id, topic=topic),
-                   message,
-                   retain=retain,
-                   qos=qos)
-    time.sleep_ms(sleep)
diff --git a/code/lib/umqtt/robust.mpy b/code/lib/umqtt/robust.mpy
index 6acf72b..bebc63d 100644
Binary files a/code/lib/umqtt/robust.mpy and b/code/lib/umqtt/robust.mpy differ