Скачать или смотреть Proteus Tutorial #4 - Making a Bluetooth controlled bot with 8051 in Proteus (with voice commands)

Hello everyone, welcome to yet another video on proteus simulation by Robotics & Circuits, Manipal. Today, we will build a Bluetooth-controlled robot with Microcontroller AT89C51(8051). We will also run the bot using voice commands.

The 8051 Microcontroller is one of the microcontrollers in automobiles, consumer electronics, embedded systems, etc. Intel designed this 8-bit microcontroller in 1981. Initially, this microcontroller was built using N-MOS technology. But, due to its high-power consumption, the 8051 microcontroller was rebuilt again using C-MOS technology, which consumed significantly less power.

The 8-bit microcontroller comes with an 8-bit data bus and a 16-bit address bus. The 16-bit address bus can address a 64Kb code memory space and a separate 64Kb data memory space. The 8051 has 4Kb on-chip read-only code memory, and 128 bytes of internal RAM (Random Access Memory) organized in Harvard Architecture. Harvard Architecture refers to computer architecture that has separate storage and signal pathways for data and instructions. The 8051 also has two timers/counters, four general-purpose parallel input/output ports, a serial port, and interrupt control logic with five sources of interrupts. Besides internal RAM, the 8051 has various Special Function Registers (SFR) such as the accumulator, the B register, and many other control registers.

Now that we know what 8051 is, let us start building our bot. The idea is to create a simple Bluetooth-controlled bot. The bot can also be remotely controlled using speech commands. We will be making a bot that follows simple instructions for now.

Like our previously constructed obstacle avoidance bot, we will also require motor driver L293D to drive the DC motors. We will be using one motor driver to drive the two DC motors.

Now, the communication takes place through the Bluetooth module. The HC-05 is a Bluetooth module that can add full-duplex (i.e., two-way) wireless functionality, which allows us to communicate between the microcontroller and any device with Bluetooth functionality. Various applications make this process a lot smoother on the user's end. The link will be provided in the description below.

The module consists of five pins-
1. Enable pin (this pin is used to toggle between data mode and command mode),
2. VCC
3. GND
4. Tx Transmitter (This pin is used to transmit serial data)
5. Rx Receiver (This one is used to receive serial data)

HC05 communicates with the help of the USART communication protocol at a 9600 baud rate. USART (which stands for Universal Synchronous/Asynchronous Receiver/Transmitter) is a serial communication of two protocols. This protocol is used to transmit and receive the data bit by bit with respect to the clock pulse.

We will be adding a 16x2 LCD (Liquid Crystal Display) screen in connection to the microcontroller. It will reveal the action being carried out after each instruction for our ease. There are two such rows capable of displaying 16 characters each. Each character is displayed in a 5x7 pixel matrix. The 16x2 alphanumeric dot matrix display can display 224 different characters and symbols. The LCD has two registers- Command and Data. Command registers store various commands given to the display. The data register stores data to be displayed.


And this is how the Bluetooth-controlled bot works!!!

Code and other files: https://drive.google.com/drive/folder...

Bluetooth App Link:
This is a different App but works in a similar way as shown in the video. It can be used with all kinds of microcontrollers.
https://play.google.com/store/apps/de...

This video has been submitted by Robotics and Circuits, MIT Manipal under the Robocraze Club Outreach Program. Video credits: Abhishek Srinivas Rao, Yadav Ratnesh Ravikiran