Joypad HID

[milkpirate]

Hey,

I am trying to use the nice!nano for my own project, a bluetooth game controller. I was scraping TinyGo for the BLE HID support and the most mature project I found was yours. I have seen you have a branch blehid2 (which seems to be newer than blehid), as well as blekeyboard*. I would like to use it as a starter for my project. Can you recommend a branch / resources you used for you work?

Best regards

[sago35]

Hello,
I think the following branch will help BLE HID move forward a bit.
Currently, the blehid2 branch of tinygo-keyboard works as a BLE HID Keyboard on Android, but it does not work on Windows or other platforms. This requires additional implementations, such as LESC.

https://github.com/tinygo-org/bluetooth/pull/295 https://github.com/tinygo-org/bluetooth/issues/204

[milkpirate]

Ok, I started tinkering and... its not even compiling. It does not seem to find the following functions/constants:

bluetooth.SetSecParamsBonding()
bluetooth.SetSecCapabilities()
bluetooth.NoneGapIOCapability

I tried:

• tinygo.org/x/bluetooth v0.10.0
• tinygo.org/x/bluetooth v0.8.0

Both seem to miss them. Do you have an idea about that?

Further there are quite some magic value, can you elaborate a little on these?

• https://github.com/sago35/tinygo-keyboard/blob/blehid2/ble/ble.go#L83
• https://github.com/sago35/tinygo-keyboard/blob/blehid2/ble/ble.go#L84
• https://github.com/sago35/tinygo-keyboard/blob/blehid2/ble/ble.go#L93 80% battery?
• https://github.com/sago35/tinygo-keyboard/blob/blehid2/ble/ble.go#L118
• https://github.com/sago35/tinygo-keyboard/blob/blehid2/ble/ble.go#L148
• https://github.com/sago35/tinygo-keyboard/blob/blehid2/ble/ble.go#L167
• https://github.com/sago35/tinygo-keyboard/blob/blehid2/ble/ble.go#L175

[sago35]

First, check out the blehid2 branch and try building it as is. It successfully built on my end.

$ git checkout blehid2

$ tinygo build -o /tmp/out.uf2 --target xiao-ble --stack-size 8kb --size short ./targets/sgkey-ble/
   code    data     bss |   flash     ram
 100184    3644   11168 |  103828   14812

[sago35]

Further there are quite some magic value, can you elaborate a little on these?

There are still many magic numbers left, but there are no plans to fix them at this point. I think this will be revisited when the PR approaches completion. For now, please note that this is still a draft.

[milkpirate]

Seems like something is different in your setup:

$ git pull
Host key fingerprint is SHA256:+DiY3wvvV6TuJJhbpZisF/zLDA0zPMSvHdkr4UvCOqU
+--[ED25519 256]--+
|                 |
|     .           |
|      o          |
|     o o o  .    |
|     .B S oo     |
|     =+^ =...    |
|    oo#[email protected].     |
|    E+.&.=o      |
|    ooo.X=.      |
+----[SHA256]-----+
Already up to date.

$ git st
On branch blehid2
Your branch is up to date with 'origin/blehid2'.

nothing to commit, working tree clean

$ tinygo build -o /tmp/out.uf2 --target xiao-ble --stack-size 8kb --size short ./targets/sgkey-ble/
# github.com/sago35/tinygo-keyboard
kbblesplit.go:155:30: cannot use (func(device bluetooth.Device, connected bool) literal) (value of type func(device bluetooth.Device,
connected bool)) as func(device bluetooth.Address, connected bool) value in argument to d.adapter.SetConnectHandler

Though not the error I expected.

Regarding the magic values, ChatGPT helped me out on that.

[sago35]

I haven't been able to respond for a while.

In the near future, I will investigate using the latest tinygo.org/x/bluetooth.