Hi mates
I'm trying to do a project for a friend of mine, which consists on re-using an Amazon dash button, to poweroff his computer with Windows 10.
I saw there are "flic" buttons (expensive), and they make it easier to activate events through IFTTT which in turn can do the task, following the steps provided in a github page I have read. So now I have the final part already prepared, but I only need my dash button to activate a curl command in a custom script I made in a OpenWRT router I have (Comtrend AR-5387un)(call it JAZZTEL_VILLEGOLAS), and then the curl command activates the IFTTT applet.
I have posted a Question in this forum - you can see here for reference. Because I needed help with the "somewhat difficult" part of the script. I finally developed my script further to this point (this version I call it dashbuttonsc3):
#!/bin/sh
#coded by borhacker
continue=true
while [ $continue == true ]
do
if [ `timeout 10 tcpdump -i wlan0 -U -s0 -v | grep -c "DASHBUTTON.lan" ` -gt 0 ]
then
echo "match"
curl https://maker.ifttt.com/trigger/button/json/with/key/mykey-sdpahdf
else
echo "no-match"
fi
done
Also I have developed a init.d script (called dashbuttonserv4):
#!/bin/sh /etc/rc.common
#coded by borhacker
STOP=09
START=21
continue=true
start() {
while [ $continue == true ]
do
if [ `timeout 10 tcpdump -i wlan0 -U -s0 -v | grep -c "DASHBUTTON.lan" ` -gt 0 ]
then
echo "match"
curl https://maker.ifttt.com/trigger/button/json/with/key/mykey-sdpahdf
else
echo "no-match"
fi
done
}
stop() {
continue=false
}
Now I'm facing two problems, one of which I'd like to face later, and the other is what I did this thread for:
Previously, I had an earlier version on the script - dashbuttonsc2 - which worked correctly, but not always. The only difference with dashbuttonsc3 was the (if ... tcpdump) line, which in dashbuttonsc2 was like this:
if [ `timeout 10 tcpdump -i wlan0 host 192.168.2.26 -U -s0 -v | grep -c "DASHBUTTON.lan" ` -gt 0 ]
Sometimes I pressed the button (being the script executed in the infinite loop), and I could see the packets being captured, but sometimes as well, I pressed the button and there were no packets. So I modified the tcpdump command to include all packets in wlan0, and not only with the address 192.168.2.26. So then, it became the script called dashbuttonsc3. That address is the one assigned to the dash button, by a static lease from the DHCP server of JAZZTEL_VILLEGOLAS. Then it started to capture more packets, but still there are times when I press the button and I don't see any activity.
I don't know what could be happening so that there is no packets being captured.
So I ask you please,
can you tell me how can I run a WiFi packet sniffing tool, to capture the MAC address of the dashbutton, and be integrated in my script, instead of the tcpdump command? I have heard about the monitor mode and sniffing WiFi packets, etc. I have seen too, in my Wireless configuration, the monitor mode is available, and the router is only used for this purpose, so I don't have any drawbacks in using the monitor mode. The button is configured to search for the AMAZONSERV SSID and password mypassword123 (not exactly!! 
).
So maybe with this tool I could capture everything that comes from my dash button.
The other problem is related to automating the init.d script (dashbuttonserv4) but I will ask later about this.
Note, for completeness, regarding my network (maybe you're needing to know this technical aspects):
- My home network is using the subnet 192.168.1.0/24
- JAZZTEL_VILLEGOLAS is only used to do this specific task
- JAZZTEL_VILLEGOLAS has two interfaces, and they're isolated.
-
- one is
br-lan, which is connected to my home network with the IP192.168.1.25
- one is
-
- the other is
wlannwhich is connected to the Wireless AP with the SSIDAMAZONSERV. Thewlanninterface is in the subnet 192.168.2.0/24
- the other is
- The DHCP server is disabled in
br-lan, and the DHCP server is enabled in thewlannto give IP address to my dash button192.168.2.26. Also this DHCP server is serving an unexistant gateway, the192.168.2.1, to make the dash button think it can connect to internet and make it try to connect. -
JAZZTEL_VILLEGOLAS, in the
wlanninterface, has the static IP192.168.2.3. - The firewall has only 1 zone,
lan, and is assigned to br-lan. output-accept. input-accept. forward-reject. - I configured it like this to prevent my dash button to connect to amazon servers, and it could get banned/bricked/not working. They say that Amazon doesn't want us to use the dash buttons anymore.
Thanks a lot for your time and your help
Borhacker