flash-ota: delay sending AES response a bit

[hmcfgusb] / README.md

diff --git a/README.md b/README.md
index a658d7f7b1360c361221054e7b2e3f3e6b655245..85592a01f539080b045e51700a8ab9786b2b3cee 100644 (file)
--- a/README.md
+++ b/README.md
@@ -48,7 +48,7 @@ AES-signing like [KeyMatic][].
     ``define hmusb HMLAN 127.0.0.1:1234``  
     ``attr hmusb hmId <hmId>``
 
-**Important compatibility information:**
+**Important compatibility information:**  
 If older Fhem-versions (before 2015-06-19) or [Homegear][] before 2015-07-01
 is used to connect to hmland, the `-I` switch might be needed to
 impersonate a LAN-interface (this replaces the identity string HM-USB-IF with
@@ -60,7 +60,7 @@ hmland without this switch. It was the hardcoded default in versions
 This incompatibility is needed so connecting software is able to
 differentiate between HM-CFG-LAN and HM-CFG-USB.
 
-**Important security information:**
+**Important security information:**  
 Versions before 0.101 do not correctly transmit the AES channel-mask
 to the HM-CFG-USB, which results in signature-requests not being generated
 by the device in most cases. This can lead to processing of unsigned messages
@@ -76,13 +76,15 @@ you should upgrade to at least version 0.101.
 
 1.  Compile the hmcfgusb utilities like in the hmland HowTo above
     (steps 1 to 5) and stay in the directory
-2.  Download the new firmware: [hmusbif.03c7.enc][]:
+2.  Download the new firmware: [hmusbif.03c7.enc][] (extracted from the
+    [Firmware update tool][]):
     `wget https://git.zerfleddert.de/hmcfgusb/firmware/hmusbif.03c7.enc`
 3.  Make sure that hmland is not running
 4.  Flash the update to the USB-stick:
     `./flash-hmcfgusb hmusbif.03c7.enc` (You might need to use `sudo` for this)
 
 [hmusbif.03c7.enc]: https://git.zerfleddert.de/hmcfgusb/firmware/hmusbif.03c7.enc
+[Firmware update tool]: http://www.eq-3.de/Downloads/Software/Firmware%20Update%20Tool/HM-CFG-USB-2_FW-UpdateTool-Usersoftware_V1_1_eQ-3_140619.zip
 
 ### Updating HomemMatic devices over the air (OTA) (also for CUL devices): ###
 
@@ -99,7 +101,21 @@ you should upgrade to at least version 0.101.
     the new firmware to the device with serial *KEQ0123456*:  
      `./flash-ota -f hm_cc_rt_dn_update_V1_4_001_141020.eq3 -s KEQ0123456 -c /dev/ttyACM0`
 
+**Automatic firmware-updates:**  
+The options `-C` (HMID of central), `-D` (HMID of device) and `-K` (AES key w/
+index) can be used to send a device to the bootloader automatically without
+manually rebooting the device while pressing buttons:
+
+`./flash-ota -f hm_cc_rt_dn_update_V1_4_001_141020.eq3 -C ABCDEF -D 012345 -K 01:00112233445566778899AABBCCDDEEFF`
+
+`-K` is only needed, when AES signing is active on the device.
+
+**Acknowledgments:**  
+flash-ota uses the public domain [AES implementation by Brad Conte][] to answer
+signing-requests with culfw-devices.
+
 [eQ-3]: http://www.eq-3.de/downloads.html
 [culfw]: http://culfw.de/culfw.html
 [CUL]: http://busware.de/tiki-index.php?page=CUL
 [COC]: http://busware.de/tiki-index.php?page=COC
+[AES implementation by Brad Conte]: https://github.com/B-Con/crypto-algorithms