diff --git a/urls.txt b/urls.txt
new file mode 100644
index 0000000..e3d14e8
--- /dev/null
+++ b/urls.txt
@@ -0,0 +1,7 @@
+https://www.cnx-software.com/2017/10/16/esp32-micropython-tutorials/
+http://wiki.seeedstudio.com/Grove-Sunlight_Sensor/
+https://github.com/THP-JOE/Python_SI1145/blob/master/SI1145/SI1145.py
+http://docs.micropython.org/en/latest/esp8266/reference/index.html
+https://github.com/adafruit/Adafruit_Python_GPIO/blob/master/Adafruit_GPIO/I2C.py#L145
+https://hackernoon.com/get-on-the-good-foot-with-micropython-on-the-esp32-decdd32c4720?gi=937ce8fea7dc
+