My github repo below is contains collection of Arduino code, sketches and libraries that achieve a variety of simple but useful tasks, none are necessarily a project in and of itself, but may be included in a number of projects providing support for specific functionality.
Here is a description of some Arduino code you can find.
esp8266 a series of sketches for the esp8266 chip
LCDKeypad drives a 16x2 LCD display with 7 additional buttons. These display’s are very useful for projects that need to display short but important info.
SensorStation load this software on an arduino loaded with sensors that will broadcast to an external station. Sensors can be configured at runtime.
Various serial interfaces exist for UART, RF, Bluetooth and Wifi according to what is available.
Balance controls a 2-wheeled balancing robot with the help of an MPU6050 gyroscope and accelorometer.
Blink Hello, World!
i2c Uses the Wire library to implement the TLVs application layer protocol enabling an Arduino wired to an I2C bus to communicate with other devices in a well defined, organzed manner.
lcd An alternative LCD program for a display that lacks the input buttons of the LCDKeypad code.
mctl Runs on an arduino accepting CONTROL OUTPUT skid messages from a serial port (e.g. UART, RF, Bluetooth, etc) with the format /control/skid/
/ , modifying the load given to the throttle.
rf24joy This is code for the RF Joystick project. It allows and Nano connected to a joystick with two degrees of freedom and a button. Nano accepts signals from the Joystick, and attached button, advertised the data over an RF (Nordic Labs RF24L01 chip)
For more recent and more complex project I will tend to use other more sophisticated chipsets like the esp8266, esp32 and stm32, they are cheaper and more powerful than the Arduino, in the case of the esp8266 and esp32, they have built in wifi!