Display humidity & temperature through framebuffer. (w/ Weather-Board-Zero)
You need to compile the Linux kernel with framebuffer options enabled and connect OLED which is portable with ssd1306 / ssd1315.
Then, you can check framebuffer files in your /dev directory.
$ ls /dev/fb*
/dev/fb0 /dev/fb1
You need to connect the Weather-Board-Zero module to gather information about humidity and temperature.
() This module is made for ODROID models in hardkernel, but I think it's possible to connect with other board which supports I2C protocol.
For me, I also used MULTIIO Training Board for ODROID-M1S, so maybe you need other gadgets to make this thing work as expected.
()
You can contol this program by systemd. sudo make install will automatically register program into systemd. You can also unregister the program by sudo make uninstall command.
It's just a toy program, so don't expect too much about functionality!
But I think it has some interesting topics, like displaying bitmap fonts in monochrome screen etc...
By the way, sorry for dirty code XD