diff --git a/REAME.md b/REAME.md
index af34753..357abec 100644
--- a/REAME.md
+++ b/REAME.md
@@ -1,33 +1,30 @@
 # RASPBERRY PI ALS ZENTRALRECHNER FUER BIENENSTOCKUEBERWACHUNG
 
-## Hardware Variante A
+## Hardware
 - Raspberry Pi Zero W
-- 3G Stick Huawei E3531
-
-## Hardware Variante B (Kurt Jakob)
-- Raspberry Pi 3 Model B
-- Itead Raspberry Pi GSM/GPRS Board (SIM800)
-- ModMyPi Itead GSM Board Gehäuse
+- 3G/4G Stick Huawei E3533
 
 ## INSTALLATION
 
 ### Grundinstallation
 ```
-Image: 2017-09-07-raspbian-stretch-lite.zip von https://www.raspberrypi.org/downloads/raspbian/
+Image: 2018-04-18-raspbian-stretch-lite.zip von https://www.raspberrypi.org/downloads/raspbian/
 
 Installation auf SD:
-# unzip -p 2017-09-07-raspbian-stretch-lite.zip |dd of=/dev/sdXXX bs=4M conv=fsync
+# unzip -p 2018-04-18-raspbian-stretch-lite.zip |dd of=/dev/sdXXX bs=4M conv=fsync
 
 # raspi-config
-- Change User Password: meielis-...
+- Change User Password: meielis-b...
 - Hostname: beielipi
+- enable predicatble network interface names
 - locale: en_US.utf8 (auch Default)
-- locale: de_CH.utf8 
+- locale: de_CH.utf8
 - Timezone: Europe/Zurich
 - Change Wifi Country: CH
 - Keyboard: Generic 105-key (Intl), German (Switzerland)
 - Enable SSH Server
-- Fuer Variante A: WLAN einrichten (siehe "per WLAN")
+- WLAN einrichten (siehe "per WLAN")
+- reboot
 
 # apt-get update
 # apt-get upgrade
@@ -43,9 +40,6 @@ Software installieren:
 # apt-get install ntpdate
 # apt-get install dnsmasq
 # apt-get install python-bottle
-
-Firmware-Update:
-# rpi-update 
 ```
 
 ### Zugang ermöglichen
@@ -61,18 +55,28 @@ network={
   ssid="haerdoepfu27" psk="XXXXXXXXXXXX"
 }
 ```
-#### per LAN
+
+### Boot Config anpassen
+
+in /boot/config.txt
+
 ```
-root@beielipi:~# cat /etc/network/interfaces.d/eth0 
-auto eth0
-iface eth0 inet static
-	address 192.168.0.50
-	netmask 255.255.255.0
+dtparam=audio=off
 ```
 
-### Variante A
+### Strom sparen
+
+```
+/etc/rc.local einfuegen:
+# Disable HDMI to save power
+# Joerg Lehmann, 2.4.2018
+/usr/bin/tvservice -o
+
+exit 0
+```
+
+### Einrichten GSM
 ```
-Einrichten GSM:
 /etc/usb_modeswitch.d/12d1:157d:
 #Huawei E3533
 TargetVendor=0x12d1
@@ -81,6 +85,7 @@ MessageContent="55534243123456780000000000000011063000000000010000000000000000"
 NoMBIMCheck=1
 
 /etc/usb_modeswitch.conf:
+DisableMBIMGlobal=1
 SetStorageDelay=8
 
 Workaround fuer USB disconnects:
@@ -116,22 +121,6 @@ OK              AT+CPMS="SM";+CNMI=2,0,0,2,1
 
 ```
 
-### Variante B
-```
-# systemctl disable hciuart.service
-
-# cat /boot/config.txt
-...
-# Wegen GSM Modul
-dtoverlay=pi3-miniuart-bt
-#dtoverlay=pi3-disable-bt
-enable_uart=1
-===
-
-# cat /boot/cmdline.txt
-dwc_otg.lpm_enable=0 root=PARTUUID=61612258-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait
-===
-```
 
 ### Test SMS-Versand:
 ```
@@ -167,14 +156,8 @@ beieli@beielipi:~ $ exit
 # for i in $(find . -type f); do echo cp $i /$i ; done
 # for i in $(find . -type f); do cp $i /$i ; done
 
-Fuer Variante A wieder loeschen:
-# rm /etc/cron.d/gsm_poweron
-
 # systemctl enable beielimon
 # systemctl enable smsmon
-Fuer Variante B:
-# systemctl disable dhcpcd
-
 
 Reboot:
 # init 6
diff --git a/root-bin/gsm_powerkey.py b/root-bin/gsm_powerkey.py
deleted file mode 100755
index 43f410a..0000000
--- a/root-bin/gsm_powerkey.py
+++ /dev/null
@@ -1,24 +0,0 @@
-#!/usr/bin/python
-#
-# Simuliert das Druecken des Powerkeys, um das GSM-Modul an- oder abzuschalten
-#
-import time
-import RPi.GPIO as GPIO
-
-# RPi.GPIO Layout verwenden (wie Pin-Nummern)
-GPIO.setmode(GPIO.BOARD)
-
-# Pin 11 (GPIO 17) auf Output setzen
-GPIO.setup(11, GPIO.OUT)
-
-# Druecken simulieren
-GPIO.output(11, GPIO.HIGH)
-
-# Pause, mindestens eine Sekunde gemaess https://www.itead.cc/wiki/RPI_SIM800_GSM/GPRS_ADD-ON_V2.0
-time.sleep(1.5)
-
-# Weg vom Taster... 
-GPIO.output(11, GPIO.LOW)
-
-# Cleanup 
-GPIO.cleanup()
diff --git a/root-bin/gsm_poweron.py b/root-bin/gsm_poweron.py
deleted file mode 100755
index 1866498..0000000
--- a/root-bin/gsm_poweron.py
+++ /dev/null
@@ -1,36 +0,0 @@
-#!/usr/bin/python
-#
-# GSM-Modul anschalten, falls ein keine Antwort gibt...
-#
-import time
-import RPi.GPIO as GPIO
-import serial
-
-def PowerOn():
-    # RPi.GPIO Layout verwenden (wie Pin-Nummern)
-    GPIO.setmode(GPIO.BOARD)
-
-    # Pin 11 (GPIO 17) auf Output setzen
-    GPIO.setup(11, GPIO.OUT)
-
-    # Druecken simulieren
-    GPIO.output(11, GPIO.HIGH)
-
-    # Pause, mindestens eine Sekunde gemaess https://www.itead.cc/wiki/RPI_SIM800_GSM/GPRS_ADD-ON_V2.0
-    time.sleep(1.5)
-
-    # Weg vom Taster... 
-    GPIO.output(11, GPIO.LOW)
-
-    # Cleanup 
-    GPIO.cleanup()
-
-with serial.Serial('/dev/ttyAMA0', 115200, timeout=2) as ser:
-    ser.write(b'AT\n')
-    line = ser.readline()   
-    line = ser.readline()   
-    print "Feedback: %s" % (line)
-    if line.strip() != "OK":
-        print "Modem reagiert nicht, evtl. abgeschaltet... wir schalten es ein..."
-        PowerOn()
-ser.close()             # close port