diff --git a/DAB-usb-receiver.md b/DAB-usb-receiver.md
new file mode 100644
index 0000000..1752753
--- /dev/null
+++ b/DAB-usb-receiver.md
@@ -0,0 +1,37 @@
+some chinese dab+ receiver:
+
+`ID 1234:1111 Brain Actuated Technologies mvsiicon 026 usb audio`
+
+```
+[151974.121729] usb 2-2: new full-speed USB device number 44 using xhci_hcd
+[151974.281931] usb 2-2: New USB device found, idVendor=1234, idProduct=1111, bcdDevice= 1.00
+[151974.281939] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
+[151974.281942] usb 2-2: Product: mvsiicon 026 usb audio
+[151974.281944] usb 2-2: Manufacturer: MVSILICON
+[151974.281947] usb 2-2: SerialNumber: 20151012
+[151974.911246] usb-storage 2-2:1.0: USB Mass Storage device detected
+[151974.911440] scsi host4: usb-storage 2-2:1.0
+[151974.911553] usbcore: registered new interface driver usb-storage
+[151974.918100] usbcore: registered new interface driver uas
+[151975.922059] scsi 4:0:0:0: Direct-Access     WRADIO   DAB Stick        V1.0 PQ: 0 ANSI: 2
+[151975.922416] sd 4:0:0:0: Attached scsi generic sg2 type 0
+[151975.925832] sd 4:0:0:0: [sdc] 335544320 512-byte logical blocks: (172 GB/160 GiB)
+[151975.929340] sd 4:0:0:0: [sdc] Write Protect is off
+[151975.929345] sd 4:0:0:0: [sdc] Mode Sense: 0b 00 00 08
+[151975.929828] sd 4:0:0:0: [sdc] No Caching mode page found
+[151975.929833] sd 4:0:0:0: [sdc] Assuming drive cache: write through
+[151975.943407]  sdc:
+[151975.960879] sd 4:0:0:0: [sdc] Attached SCSI removable disk
+```
+
+
+Howeever, the device simulate a usb drive, which should contain some mp3 files. those files are names after the station. If this file gets opened the LED blinks red while tuning and is stable green if successfully tuned.
+
+the file DAB_VER.TXT contains the string: 20190218
+
+more information can be found here: https://github.com/AlbrechtL/AP8224-DAB-Dongle
+and here: https://www.rundfunkforum.de/viewtopic.php?t=56487&start=30#p1507573
+here: https://www.rtl-sdr.com/tysonpower-reviews-a-cheap-15e-dab-dab-usb-receiver-dongle-that-generates-an-mp3-stream/
+
+there is one button
+1. hold down and inserting stick: possible firmware update mechanism (4 files, Bootloader_Version.txt [M1BOOT20190403a], FIRMWARE.BIN, Readme.txt, Update_Done.ctl)
\ No newline at end of file
diff --git a/archlinux.md b/archlinux.md
index 53f45fe..01da0a9 100644
--- a/archlinux.md
+++ b/archlinux.md
@@ -26,6 +26,8 @@ or prepare the file`/etc/systemd/journald.conf` and this value:`SystemMaxUse=50M
 - reboot the system to check if anything is broken
 - add secureboot https://wiki.archlinux.org/title/Unified_Extensible_Firmware_Interface/Secure_Boot#Implementing_Secure_Boot
 
+### git use credential store
+https://gist.github.com/maelvls/79d49740ce9208c26d6a1b10b0d95b5e
 
 ## failure recovery
 1. boot from archlinux usb stick
diff --git a/firmware_sammelbecken.md b/firmware_sammelbecken.md
new file mode 100644
index 0000000..c81a956
--- /dev/null
+++ b/firmware_sammelbecken.md
@@ -0,0 +1,73 @@
+Willkommen im Wiki.
+
+Hier wird ein Sammelsurium angelegt, welches Snippets für alles enthält, was mir über den Weg läuft.
+#### TS100 soldering iron
+Hold B
+v2.11.372F8E3
+29-08-20
+Hold A
+DFU:3.45
+New drive available: 7BA978B8
+put hex file there, systems reboots, a file with the ending .RDY or .ERR is placed.
+
+#### Moto X4
+```
+*#*#4636#*#*  --> Telefonwartungsmenü
+```
+```
+VoLTE sowie WiFiCall kann erst mit neuem Update kommen, da der APN von 07 auf 03 geändert wurde und die carrier-Datei muss in der Firmware abgeändert werden.
+```
+[Nachweis VoLTE](https://forums.lenovo.com/t5/Moto-X4/VoLTE-on-ALDI-TALK/m-p/4228082)
+
+#### Odroid HC1 sdcard handling
+Mirror second bootstage
+dd if=/dev/mmcblk0 of=/dev/sdc bs=512 count=8192
+partclone (maybe some resize due different sdcard size is required)
+partclone.ext4 -N -b -s /dev/mmcblk0p1 -o /dev/sdc1
+
+
+##### STM32 F103 clones
+https://www.blaatschaap.be/?p=120
+
+#### nrf51822 board
+Das Board ist ein übliches nrf51822 board, welches mit der Waveshare BLE400 Platform zum SDK wird. Das Rastermaß scheint kleiner zu sein.
+Mit einem ST-Link V2 konnte über die beiden Pins SWCLK und SWIO geflasht werden. 
+```
+openocd -f interface/stlink-v2.cfg  -f target/nrf51.cfg
+
+telnet localhost 4444
+Trying ::1...
+Connection failed: Verbindungsaufbau abgelehnt
+Trying 127.0.0.1...
+Connected to localhost.
+Escape character is '^]'.
+Open On-Chip Debugger
+> halt
+target halted due to debug-request, current mode: Handler HardFault
+xPSR: 0xc1000003 pc: 0xfffffffe msp: 0xffffffd8
+> nrf51 mass_erase
+
+> flash banks
+#0 : nrf51.flash (nrf51) at 0x00000000, size 0x00040000, buswidth 1, chipwidth 1
+#1 : nrf51.uicr (nrf51) at 0x10001000, size 0x00000100, buswidth 1, chipwidth 1
+> flash write_image /home/koelner/Downloads/btlejack-firmware-ble400.hex
+Padding image section 0 with 2112 bytes
+Padding image section 1 with 5864 bytes
+Padding image section 2 with 81204 bytes
+Padding image section 3 with 908 bytes
+using fast async flash loader. This is currently supported
+only with ST-Link and CMSIS-DAP. If you have issues, add
+"set WORKAREASIZE 0" before sourcing nrf51.cfg to disable it
+target halted due to breakpoint, current mode: Handler HardFault
+xPSR: 0x61000003 pc: 0x2000001e msp: 0xffffffd8
+using fast async flash loader. This is currently supported
+only with ST-Link and CMSIS-DAP. If you have issues, add
+"set WORKAREASIZE 0" before sourcing nrf51.cfg to disable it
+target halted due to breakpoint, current mode: Handler HardFault
+xPSR: 0x61000003 pc: 0x2000001e msp: 0xffffffd8
+wrote 261156 bytes from file /home/koelner/Downloads/btlejack-firmware-ble400.hex in 4.912921s (51.911 KiB/s)
+> reset
+
+```
+Der CP2102 Adapter TTL kann wohl an P0.09 und P0.11 angeschlossen werden. 
+https://github.com/virtualabs/btlejack-firmware/blob/master/config/ble400.json
\ No newline at end of file
diff --git a/hardware-list.md b/hardware-list.md
index 6f7fe0c..4825947 100644
--- a/hardware-list.md
+++ b/hardware-list.md
@@ -68,7 +68,47 @@ TBD
 Transcend HUB2K USB3.1 Gen1 4-Port-Hub W/O:F10639 (Production Year: 2019)
  idVendor=8564, idProduct=4100, bcdDevice=93.03
 ```
+### wifi dongles
+```
+uname
+5.6.4-arch1-1 #1 SMP PREEMPT Mon, 13 Apr 2020 12:21:19 +0000 x86_64 GNU/Linux
+#TP-link
+lsusb
+ID 0bda:8179 Realtek Semiconductor Corp. RTL8188EUS 802.11n Wireless Network Adapter
+dmesg
+[  +3,206148] usb 2-2: USB disconnect, device number 18
+[  +2,293722] usb 2-2: new high-speed USB device number 19 using xhci_hcd
+[  +0,017037] usb 2-2: New USB device found, idVendor=0bda, idProduct=8179, bcdDevice= 0.00
+[  +0,000006] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
+[  +0,000004] usb 2-2: Product: 802.11n NIC
+[  +0,000003] usb 2-2: Manufacturer: Realtek
+[  +0,000003] usb 2-2: SerialNumber: 00E04C0001
+[  +0,001805] Chip Version Info: CHIP_8188E_Normal_Chip_TSMC_D_CUT_1T1R_RomVer(0)
+[  +0,617239] r8188eu 2-2:1.0 wlp0s20u2: renamed from wlan0
+[  +0,390733] MAC Address = 50:3e:aa:3e:52:ba
+[  +0,003729] R8188EU: indicate disassoc
 
+#Edimax 
+ID 7392:7811 Edimax Technology Co., Ltd EW-7811Un 802.11n Wireless Adapter [Realtek RTL8188CUS]
+dmesg
+[  +6,111277] usb 2-2: new high-speed USB device number 20 using xhci_hcd
+[  +0,018769] usb 2-2: New USB device found, idVendor=7392, idProduct=7811, bcdDevice= 2.00
+[  +0,000006] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
+[  +0,000004] usb 2-2: Product: 802.11n WLAN Adapter
+[  +0,000003] usb 2-2: Manufacturer: Realtek
+[  +0,000002] usb 2-2: SerialNumber: 00e04c000001
+[  +0,002812] rtl8192cu: Chip version 0x10
+[  +0,032281] rtl8192cu: Board Type 0
+[  +0,000074] rtl_usb: rx_max_size 15360, rx_urb_num 8, in_ep 1
+[  +0,000037] rtl8192cu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin
+[  +0,000521] ieee80211 phy2: Selected rate control algorithm 'rtl_rc'
+[  +0,596727] rtl8192cu 2-2:1.0 wlp0s20u2: renamed from wlan0
+[  +0,018604] rtl8192cu: MAC auto ON okay!
+[  +0,011186] rtl8192cu: Tx queue select: 0x05
+[  +0,486535] rtl8192cu: MAC auto ON okay!
+[  +0,010523] rtl8192cu: Tx queue select: 0x05
+
+```
 ### gadgets
 #### DAB+ 
  https://github.com/AlbrechtL/AP8224-DAB-Dongle
diff --git a/lenovo_L13YOGA_G2_AMD.md b/lenovo_L13YOGA_G2_AMD.md
index ddae915..23956a7 100644
--- a/lenovo_L13YOGA_G2_AMD.md
+++ b/lenovo_L13YOGA_G2_AMD.md
@@ -15,4 +15,4 @@ My own system: https://linux-hardware.org/?probe=6dfbd97685
 1. keyboard backlight https://wiki.archlinux.org/title/Keyboard_backlight#On_GNOME
 2. keyboard FN keys
 3. bluetooth daemon disabled by default
-4. touchscreen not detected
\ No newline at end of file
+4. touchscreen not detected - suddenly then it appears
\ No newline at end of file
diff --git a/philips0819_10_aircleaner.md b/philips0819_10_aircleaner.md
new file mode 100644
index 0000000..577e2bf
--- /dev/null
+++ b/philips0819_10_aircleaner.md
@@ -0,0 +1,41 @@
+# Philips 0819/10 Luftreiniger
+## Preambel
+Damit man vom Gleichen spricht
+
+![](https://upload.wikimedia.org/wikipedia/commons/3/30/US_PM2.5_Standards_and_Air_Quality_Index.jpg)
+
+Weil die Xiami Geräte Air Purifier 2C und 3H sich wohl den chinesischen GRenzwerten verbunden fühlen, ist die Wahl auf das Philips Gerät gefallen. 
+* DIY Kohlefilter möglich
+
+
+## Gerät
+### IC-Markierungen
+```
+tb6203af28
+b943t00b3g2
+
+utc 
+mc34063ag
+```
+
+### Zum Zerlegen:
+1. 4 Schrauben an der Unterseite lösen
+2. Bodenring abheben
+3. schwarze Verblendung für Stromanschluss seitlich abziehen
+3. 4 Schrauben am schwarzen Einsatz lösen
+4. ggf. Schutzklappe des PM-Sensors entfernen
+5. den schwarzen Einsatz nach unten hin entfernen (Verhakt sich leicht, Verkanten auf Y-Achse sowie leichtes Zusammendrücken des Gehäuses zum Spalt erzeugen)
+6. Kappe am schwarzen Einsatz abheben
+7. 2 Schrauben und 2 Haltenasen an der Platine lösen
+8. 3 Schrauben an der Motorabdeckung lösen
+9. N/A
+
+### Platine und Bauteile
+* 3 RGB LEDs für die Beleuchtung
+* 1 LDR für Helligkeitsregeleung (?)
+* 1 rote LED für Filterwechselmarker
+* 1 Touchfeld (Spirale)
+* I2C Anschluss (?) 5V, GND, SDA, SCK
+* MC34063AG DC-DC Converter Control Unit [](http://www.unisonic.com.tw/datasheet/MC34063A.pdf)
+* Nidec 42F704Q900 Motor (?)
+* PM Sensor PPD42NJ ? (https://www.shinyei.co.jp/stc/eng/products/optical/ppd42nj.html ?) 5v, GND, P1 Pins genutzt
\ No newline at end of file
diff --git a/radio_sniffer.md b/radio_sniffer.md
new file mode 100644
index 0000000..bc51b81
--- /dev/null
+++ b/radio_sniffer.md
@@ -0,0 +1,36 @@
+# radio sniffer
+
+### CC2531 802.15.4/ZigBee
+(https://github.com/andrewdodd/pyCCSniffer)
+(https://github.com/riverloopsec/killerbee)
+
+to parse directly to wireshark [V1.3]
+(https://github.com/homewsn/whsniff)
+
+As there exists a default key for linking add to wireshark after using
+AES 128 bit Encryption /32bit MAC
+
+| Key | Direction | Label |
+| -------- | -------- | -------- |
+| 5A:69:67:42:65:65:41:6C:6C:69:61:6E:63:65:30:39 | Normal | Zigbee Trust Center Link Key |
+| 81:42:86:86:5D:C1:C8:B2:C8:CB:C5:2E:5D:65:D1:B8 | Normal | light link commissioning key |
+| 9F:55:95:F1:02:57:C8:A4:69:CB:F4:2B:C9:3F:EE:31 | Normal | light link master key |
+
+
+
+https://blog.jimmo.id.au/2017/02/25/zigbee-packet-capture.html
+
+[Visualize mesh connection from pcap](https://github.com/mingqian/zigbee-viewer)
+
+### CC2540 BLE4
+BLE has got three announcement channels, therefore three devices needed to capture all needed protocol handling.
+http://www.ti.com/tool/PACKET-SNIFFER
+
+https://github.com/bertrik/cc2540
+
+
+BBC micro:bit, nRF51822
+https://github.com/virtualabs/btlejack
+
+### CC26XX
+https://github.com/nccgroup/Sniffle
\ No newline at end of file