![uart serial communication basics uart serial communication basics](https://image.slidesharecdn.com/8051-serialcommunication-110607135617-phpapp01/95/8051-serial-communicationuart-4-728.jpg)
In this tutorial, we learn to Enable the inbuilt hardware module for UART in PIC16F877A Microcontroller and how to communicate with your Computer using the UART protocol. RS232 connection to MAX232 is discussed in Section 10.2. Serial communication using a Microcontroller is one of the easiest operations to learn on a microcontroller and it comes into use in almost every application. MAX232 1C chips are commonly referred to as line drivers.
![uart serial communication basics uart serial communication basics](https://www.gadgetronicx.com/wp-content/uploads/2014/09/avr-controller-uart-serial-communication.png)
Modbus has become a de facto standard communication protocol and is now a commonly available means of connecting industrial electronic devices. For this reason, to connect any RS232 to a microcontroller system we must use voltage converters such as MAX232 to convert the TTL logic levels to the RS232 voltage levels, and vice versa. Modbus is a data communications protocol originally published by Modicon (now Schneider Electric) in 1979 for use with its programmable logic controllers (PLCs). In RS232, a 1 is represented by -3 to -25 V, while a 0 bit is +3 to +25 V, making -3 to +3 undefined. The universal serial communication interface (usci) supports multiple serial communication modes with one hardware module. However, since the standard was set long before the advent of the TTL logic family, its input and output voltage levels are not TTL compatible. This standard is used in PCs and numerous types of equipment. This data is often transmitted over a serial interface.
![uart serial communication basics uart serial communication basics](https://www.electronicshub.org/wp-content/uploads/2017/07/RS232-DTE-DCE.jpg)
An example would be a digital temperature sensor reporting the ambient temperature of the room to the the main microprocessor. Which necessarily means, each device can either be a transmitter or a receiver during the data transmission process. Overview Embedded systems often require communication between integrated circuits. The speed parameter is the baud rate that we want the UART to run. The easiest way to configure the Arduino’s UART is by using the function Serial.begin ( speed). Serial.begin () To communicate via the UART interface, we need to configure it first. Today, RS232 is the most widely used serial I/O interfacing standard. The UART serial communication bus can only have 2 devices communicating with each other in one of the 3 modes shown in the previous sub-section. The serial object has the necessary functions for an easy use of the Arduino’s UART interface. In this book we refer to it simply as RS232. RS232B and RS232C were issued in 19, respectively.
![uart serial communication basics uart serial communication basics](https://www.codrey.com/wp-content/uploads/2017/10/RS232-Serial-Communication-with-UART.png)
In 1963 it was modified and called RS232A. Pin = 4 byte data.To allow compatibility among data communication equipment made by various manufacturers, an interfacing standard called RS232 was set by the Electronics Industries Association (EIA) in 1960. Example 2 – SPI communication Example of a generic SPI communication #include const int chip.