rhoenschrat
commented
3 years ago I solved the puzzle. As the official GoPro App is now controlling the Hero8 and up via Bluetooth by default, I was able to use the packet sniffer tool to check how they are doing it. I was quite close with my assumption, but the date is sent as one parameter with the year using all four digits like 2f 090d0707e501040a0413
where 09 = 9 -> length of request 0d = 13 -> request: set date time 07 = 7 -> length of parameter 07e5 = 2021 -> year 01 = 1 -> month 04 = 4 -> day 0a =10 -> hour 04 = 4 -> minute 13 = 19 -> second
KonradIT
ludaokai
fcaraballo
Archimede55
Does anyone know how to use the Bluetooth command to set date and time of the GoPro?
On this page: https://gethypoxic.com/blogs/technical/gopro-hero5-interfaces I can see that there is a command to do so like SET_DATE_TIME(new byte[]{(byte) 5, (byte) 13, (byte) 1})
But how to provide the date and time? Based on the way the date is set with the wifi api described in https://github.com/ztzhang/GoProWifiCommand/issues/3 I assumed that I need to add year (2 digits), month, day, hour, minute and second as parameters. And based on the description of the command structure in https://github.com/KonradIT/goprowifihack/blob/master/Bluetooth/Platforms/ArchLinux.md I assumed that every parameter need to be prefixed by it's length which used to by 1 byte. So I end up with the following for the parameters like: (byte) 1, (byte) 20, (byte) 1, (byte) 12, (byte) 1, (byte) 31, (byte) 1, (byte) 15, (byte) 1, (byte) 43, (byte) 1, (byte) 51
What struggles me is, that according to the described command structure it is always like request, length of parameter 1, parameter 1 [, length of parameter 2, parameter 2 ...] And the length can be 1 or 2 bytes. So the 13 in the mentioned command doesn't match that picture. And also the request 5 is already the one to set the camera to sleep mode. My assumption was that this might be a type and the request is actually 13 which also matches the order in the list of the commands. So I give it it try. I used 13 as request and added also a 13 for the overall length of the command which would by like: 2f 0d0d0114010c011f010f012b0133
But it doesn't work.
Any idea what is the right way to do it?