- digital pins(5v)
- pwm pins
- intrupt pin
- anolog input pin
- UATR
- I2C
- GND pin
- SPI speed
1. pwm pins
3,5,6,9,10 are pwm pins
analogWrite (pin, value) it is funtion used.
Value ranges from (0 ==> 255).
Types of communication
- UART
- 12C
- SPI
1 UART
Arduino uses UART communication for talking to computer (serial communication). The UART communication protocol uses two data lines: a transmit line (TX) and a receive line (RX). These lines are connected between the transmitting and receiving devices, allowing them to send and receive data in a synchronized manner
2 I2P
3 SPI
SPI uses a synchronous serial communication scheme, which means that the data is transmitted in a coordinated manner between the master and slave devices. The devices involved in SPI communication are typically classified as the master device and one or more slave devices.