diff --git a/antennen/LoRa(WAN) airtime calculator.ods b/antennen/LoRa(WAN) airtime calculator.ods
deleted file mode 100644
index e2b4805..0000000
Binary files a/antennen/LoRa(WAN) airtime calculator.ods and /dev/null differ
diff --git a/antennen/LoRa(WAN) airtime calculator.xlsx b/antennen/LoRa(WAN) airtime calculator.xlsx
deleted file mode 100644
index fc5846f..0000000
Binary files a/antennen/LoRa(WAN) airtime calculator.xlsx and /dev/null differ
diff --git a/antennen/an-00501.pdf b/antennen/an-00501.pdf
deleted file mode 100644
index 21301e4..0000000
Binary files a/antennen/an-00501.pdf and /dev/null differ
diff --git a/lit2018-hoegl.pdf b/lit2018-hoegl.pdf
deleted file mode 100644
index f65d670..0000000
Binary files a/lit2018-hoegl.pdf and /dev/null differ
diff --git a/notes.txt b/notes.txt
deleted file mode 100644
index 06e0bf2..0000000
--- a/notes.txt
+++ /dev/null
@@ -1,13 +0,0 @@
-https://www.thethingsnetwork.org/labs/story/build-the-cheapest-possible-node-yourself
-
-https://www.thethingsnetwork.org/community/berlin/post/how-to-build-a-simple-and-very-cheap-lorawan-node-with-arduino
-
-https://www.thethingsnetwork.org/forum/t/cheap-and-simple-lora-node-for-schoolproject/22364/5
-
-https://forum.iot-usergroup.de/t/nucleonbasenode328-arduino-328-pro-mini-lora-gehaeuse-antenne/287
-
-Wahrscheinlich dieses hier:
----------------------------
-https://forum.iot-usergroup.de/t/wijnand-s-iot-battery-sensor-board-weiterentwicklung/339/2
-
-http://alf4all.demon.nl/engineering/topics/digital_system_design/targets/Arduino-Pro-Mini_RFM95/index.htm
diff --git a/shopping_list.txt b/shopping_list.txt
deleted file mode 100644
index da2fe5c..0000000
--- a/shopping_list.txt
+++ /dev/null
@@ -1,16 +0,0 @@
-Arduino pro mini 3.3 V Version!  1,57 €
-    --  alternative 328P: 1,36 €
-RFM 95 W 4,72 €
-Ublox NEO-6M GPS Module GY-GPS6MV2 NEO6MV2 6.19 €
-    --  alternative ?  2,16 € 
-Ein / Ausschalter  0,08 € 
-Battery LiPo 3.7 V 1200 mAh 5,30 €
-    --  alternative: 4,61 €
-3D enclosure (Thingiverse)
-
-
-    total costs as of today, cheapest variant: 1,36 + 4,72 + 2,16 + 0,08 + 4,61 =  12,93 €
-    and some cables and board
-
-Antenna for base station:
-https://de.aliexpress.com/store/product/Glass-Fiber-Antenna-Gain-8dbm-Transmission-range-is-further-LoRa-Gateway-Antenna-with-433-470-868/2805180_32852314761.html