This kernel module is designed for the Mottura XNova lock. The XNova lock enters sleep mode after 3 seconds of inactivity. To prevent this, our module sends a keep-alive signal every 2 seconds, ensuring the lock remains awake. When the lock is in sleep mode, it does not provide status information via its output pins. However, with this module, we can read the lock's status at any time. Additionally, this module provides functionality to open, close, or set the lock to autoclose by sending a specific signal to the lock. It's important to note that running similar programs in user-space could lead to the application being preempted or even killed by the Out-Of-Memory (OOM) killer. Running this as a kernel module ensures more reliable operation.

Available commands:

echo "open" > /dev/mottura_xnova

echo "close" > /dev/mottura_xnova

echo "autoclose" > /dev/mottura_xnova

THis module do for WirenBoard 6.5. It may work on other devices, but not tested. GPIO configured for A1 A2 A3 pins. You can change it in the source code.

How to build and install

Prepare the kernel source code:

apt update
apt install build-essential libncurses5-dev fakeroot lzop bc git bison flex libssl-dev rsync
apt install gcc-arm-linux-gnueabihf

cd ~
git clone https://github.com/wirenboard/linux
cd linux
git submodule update --init --recursive

export KDIR=~/linux
export ARCH=arm
export CROSS_COMPILE=arm-linux-gnueabihf-
export KBUILD_OUTPUT=.build-wb6

make prepare

Build the module:

cd ~/mottura_xnova
make