Trying to hack/debug "Argos" (UK) WiFi Christmas lights...
I bought these on sale, reduced from £30 to £7.50. They run on an ST micro "stm32f030f4p6", have a black unmarked 16 pin SMD WiFi module inside, and drive an H-bridge to provide very crude patterns on a dual-polarity (switch the polarity to change which chip [inverse parallel LED elements) per LED bulb - white or coloured - NOT RGB, just fixed LED colours when running on colour mode).
Long story short, this thing is controlled via an Android app, and broadcasts it's own SSID access point, which you connect to. I am unsure how, but as soon as you connect your phone to that SSID, their app launches automatically!
I've done "adb logcat" on Android, can't see what's happening. I've tried sniffing the connection with Wireshark... etc... and I've port scanned the IP of the hotspot AP (192.168.4.1 it is) and NO ports seem to be open, and I scanned them ALL! I've read that these sorts of devices communicate using the "AT" command set - I even tried telling "teraterm" to connect to the IP of the WiFi module in AP mode, to no avail.
Any ideas how I could find out what data is sent to this thing, by the phone? Oh, and I do not have a scope, nor can I borrow one - but I DO have a Bus Pirate.
Thanks (pics attached)