rpi_keyboard

This repository contains HID emulator for iOS 13+, based on Raspberry Pi Zero. The reason for using it is that it can act as a USB gadget. This is enables by its support for USB OTG (On-The-Go). It gives the ability to a device to act as either USB host or USB device.

Setup

Step 0

Download and install the latest Raspbian Jessie onto a suitably large SD card, and expand the root partition. Make sure you are running kernel 4.4 or later. You can update the kernel by running:

    sudo BRANCH=next rpi-update

Step 1

Raspberry Pi kernels and firmware use a Device Tree (DT) to describe the hardware present in the Pi. DT overlays allow optional external hardware to be described and configured.

Overlays are optional elements added to the Device Tree. They enable on the fly functionality, there is no need for re-installing kernel in order for them to take affect. But, you need to reboot your system once you add additional overlay.

So, it allows us to enable USB OTG functionallity, and we will do that by executing the following:

    echo "dtoverlay=dwc2" | sudo tee -a /boot/config.txt

The /boot/config.txt acts in role of BIOS for Raspberry Pi.

Now, we need to enable dwc2 as a kernel module. We do that by executing:

    echo "dwc2" | sudo tee -a /etc/modules

Finally, we enable Gadget ConfigFS module libcomposite by running:

    sudo echo "libcomposite" | sudo tee -a /etc/modules

Step 2

Now, we need to run:

    ./installer.sh

This will create HID USB gadget.

https://www.usb.org/sites/default/files/documents/hut1_12v2.pdf - PAGE 56

In order to run the main program of controller, you need to install python-socketio for Python3: pip3 install python-socketio

Then, you run it with: python3 main.py