Pure C Arduino

I would like to share my project with you. It's an RTC clock with thermometer powered by atmega328p. Clock, displaying current time, date & day of week. It took me a while to finish this project since I wanted to polish the software. I wanted to implement a couple of features which will make my clock more interesting than any other similar device like that build before. I'll try to go through all the details now so, if you find this project interesting you can build it yourself (everything. including the software, is available for free). Hardware  The hardware itself is pretty simple. I used a ds18b20 digital One-Wire temperature sensor as a thermometer, a DS1307 RTC module which comes with a battery and a classic hd44780 LCD 16x2 display. Everything is pretty generic in that matter. There's a diode as well used to indicate that the clock is running and a couple of buttons. Besides that I use a couple of transistors in order to be able to control the LCD'...

It's often very useful to have some sort of interface through which a basic management can be done of our application. Whether you're designing a giant Marquee with a LED display or a plotter or you simply need to get some diagnostics from your device occasionally, a simple CLI system can come very handy.  Of course, designing something similar to "bash" or any other unix shell is completely out of scope since those applications are huge and are simply an overkill for our needs. It's pretty simple though to create some basic, yet flexible & easilly extensible CLI system. First thing needed is a command type definition. This will bind a keyword with an actual underlying routine executed for that keyword typed in the CLI . typedef struct _t_cmd { const char *cmd; void (*fh)(void*); } t_cmd; The command type is pretty simple. There's the CLI command/keyword pointer, it holds a pointer to the execution function and that's it. OK, so...