Ideas Become Reality
RS-485 is a versatile serial communication standard that enables reliable data transmission over long distances (up to 1,200 meters) and in electrically noisy environments. Unlike common protocols like UART (which uses TX/RX pins), RS-485 operates on a differential signaling method, transmitting data over two wires
In this illustration we will going to wire the HC-04,HC-05 or HC-06 module using serial communication with our Arduino board and 4 channel relay, we will going to control the relay on the Android smart phone or tablet via Bluetooth
The SPI(Serial to Peripheral Interface) develop by Motorola and later adopted by Microwire of National Semiconductor and other companies. SPI is a hardware / firmware communication protocol or sometimes Engineers called it a “four wire serial bus” communication. The SPI
Using I2C (I square C) in Arduino interface , I2C is a standard for connection MCU and peripherals together. I2C is sometimes referred to as 2 wire interface or TWI. All the Arduino board have at least 1 I2c socket