Happens on both mouse connected and disconnected.

The full message I got:

Found keyboard at: /dev/hidraw0
Failed to open mouse device
usbg_init()  No such file or directory: couldn't init gadget state
 
Error on usbg init
Error: USBG_ERROR_NOT_FOUND : Not found (file or directory removed)

This fixes the following compile warning:

pi400kb/pi400.c: In function ‘modprobe_libcomposite’:                                                                                                                                         
pi400kb/pi400.c:82:37: warning: passing argument 2 of ‘execv’ from incompatible pointer type [-Wincompatible-pointer-types]                                                                   
   82 |         execv("/usr/sbin/modprobe", argv);                                                                                                                                            
      |                                     ^~~~                                                                                                                                              
      |                                     |                                                                                                                                                 
      |                                     const char **                                                                                                                                     
In file included from pi400kb/pi400.c:14:                                                                                                                                                     
/usr/include/unistd.h:563:51: note: expected ‘char * const*’ but argument is of type ‘const char **’                                                                                          
  563 | extern int execv (const char *__path, char *const __argv[])                                                                                                                           
      |                                       ~~~~~~~~~~~~^~~~~~~~                                                                                                                            

Hi @Gadgetoid, really appreciate you made this, you pointed me to learning about libusbgx. I added ECM so that i could ssh/vnc to the PI 400 so that it's not just a "dumb" keyboard while not relying on known WIFI either. With ipad pro it's wickedly nifty and geeky ;)

Having portable access to full linux and arm with GPIO while also act as portable keyboard for Ipad.....priceless

Cheers

The keyboard will not work correctly unless there is an autostart service for modprobe libcomposite on boot. If the modprobe isn't running, the main pi400kb executable will not run.

Use -DHOOK_PATH with cmake to define a path to a .sh script (or binary) to run on grab/ungrab.

See hook.sh for details. "Grab" calls the script with a 1, "Ungrab" calls it with a 0.

Hey, this is a minor issue and would've been solved way easier and not even raised as an issue but a smarter brain than mine. However when copying and pasting and getting incredibly frustrated that I was constantly getting pi400kb.service fail no matter what I was doing I finally noticed that the script "ExecStart=/usr/sbin/pi400kb" was supposed to be "ExecStart=/usr/bin/pi400kb" which was causing the service to always fail because there is no path /usr/sbin/...

Hopefully in the meantime this is useful to others (all 12 of us) to edit the pi400kb.service before saving until this is sorted.

Hi, I've done this kind of thing, years ago on PDP-11s. I don't see you even passing the vendor and product id to the OTG side. I thought I was clever, back then, when I set the output port's control block for features and status to be the same as the controlling input side. Then, my friend Jeff showed me his version where he got the address of the interrupt service routine for input and did something that delivered the character to the output.

Anyway, I'm trying to make arbitrary keyboards work for a reason. It turns out that my fancy mechanical keyboards are mostly gaming keyboards because thats the only way to get data-processing level switches and keycaps. I need to use a KVM. KVMs really don't like gaming keyboards. Hence, put a Pi in the middle,

Is the output side getting this information in a side effect that I can't find in the code?

I would prefer to do your "suitable device" check against the protocol field, which is 1 for keyboards. I'm going to do some experimental programming and debugging.

My plan: if the device is a keyboard, just forward it. That's because it isn't going to do anything crazy--after all, the user has this keyboard and could plug it directly into the machine being controlled.

I can see so many applications for pi400kb. I would always want a Pi in between my keyboard and the host.

My best to you,

Eirikur

The actual pi400kb service will not work on start up due to the need for modprobe libconfig to be ran. This creates a service to run on startup which should fix this.

Hi there,

When trying to install yesterday I got a 404 error at the wget point. With or without sudo before the command. Is the link offline? Is there another link?