In this project, our ultimate goal is to find and solve the different requirements in making a web controlled robot that recognizes and converts textual messages placed in real world to the computer readable text files. Our objective is to integrate the appropriate techniques to explain and prove that such capability, using their limited hardware and software capabilities and not to develop new character recognition algorithms or hardware for doing that.
Raspberry Pi based Smart Home Security System
Home Security Systems are a need of the modern day houses. It is possible to design a simple home security solution by using Raspberry Pi and utilizing the power of Internet of Things. The home security system designed in this project is a simple and easily installable device built using Raspberry Pi 3, Web Cam and PIR Motion Sensor. The Raspberry Pi 3 Model B comes equipped with on-board Bluetooth (BLE) and Wi-Fi (BCM43438 Wireless LAN), so, it can be easily connected with a Wi-Fi Router to access a cloud service.
Streaming Videos using Webcam- (Part 10/12)
This article is to provide step by step instructions for making Raspberry Pi as a webcam server where we can live stream video over a local network using python scripts and some required packages. A software package used in this tutorial is Motion which is an open source software with a number of configuration options which can be changed according to our needs.
RPi Python Programming 27 – SPI protocol explained
In the previous tutorial, we discussed interfacing with the ADXL345 accelerometer sensor with Raspberry Pi using the I2C interface. UART, I2C, and SPI are the most common serial communication interfaces used in embedded systems. UART is used for point-to-point full-duplex asynchronous serial communication between two devices. I2C is used for synchronous serial communication among multiple…
RPi Python Programming 26 – Interfacing ADXL345 accelerometer sensor with Raspberry Pi
In the previous tutorial, we discussed synchronous serial communication in Raspberry Pi using I2C protocol. In this tutorial, we will use the I2C interface of Raspberry Pi to communicate with a digital sensor. The digital sensor that we will talk with is the ADXL345 accelerometer. ADXL345 is a small, ultra-low power, 3-axis accelerometer sensor that…
How to use Alarm Signal in Raspberry Pi -(Part 19/38)
The operating systems like Archlinux ARM, OpenELEC, Pidora, Raspbmc, RISC OS and the Raspbian and also Ubuntu versions are available for the Raspberrypi board. Linux operating systems especially Ubuntu is preferred for all kind of programming and development. The immediate advantage of having an Operating System like Ubuntu running on an embedded system device is multitasking. The Raspberrypi is a board actually designed for helping computer education for remote schools but it is a nice platform for programmers especially beginners to explore various coding techniques. In a multi-tasking system several processes will be running at a time. The Operating System can control a process by sending signals to it. A user can sometimes initiate a signal sending and the processes can also send signals to each other. This project demonstrates how a process can receive the signal called SIGALRM from the OS and use it.
RPi Python Programming 25 – Synchronous serial communication in Raspberry Pi using I2C protocol
In the previous tutorial, we discussed the basics of the I2C protocol. In most of the embedded devices, either UART otherwise I2C is used for console messages. In this tutorial, we will discuss serial communication in Raspberry Pi using the I2C protocol. I2C in Raspberry Pi For serial communication over the I2C protocol, the Broadcom…
RPi Python Programming 24: I2C explained
In the previous tutorial, we covered how to interface a NEO-6M GPS module with Raspberry Pi (RPi). The module communicates with RPi over the universal asynchronous receiver/transmitter or UART protocol. The UART is the most common point-to-point data communication protocol. But, it’s not the only serial communication protocol. In embedded electronics, I2C and SPI protocols are…
RPi Python Programming 23: Interfacing a NEO-6MV2 GPS module with Raspberry Pi
In the previous tutorial, we learned how to interface a SIM900 GSM-GPRS modem with Raspberry Pi (RPi) and a desktop computer. We employed serial UART communication to “talk” with the SIM900 modem. By using bidirectional data communication with the modem via a standard UART interface, we were able to make/receive calls and send/receive SMS messages on RPi and…
RPi Python Programming 22: Calls & SMS using a SIM900A GSM-GPRS modem
In the previous tutorial, we covered the AT commands that are supported by a SIM900 GSM-GPRS modem. We’ve already discussed how to interface a SIM900A GSM-GPRS modem with Raspberry Pi, Arduino, as well as other microcontrollers and desktop computers. Now, it’s time to use this modem to make and receive calls, and send and receive…
How to Access Raspberry Pi Directly through the Ethernet Port of PC – (Part 03/38)
The Raspberry pi is a single board minicomputer which has only the essential hardware included so as to meet the goal of low cost. The board is Raspberry pi board runs on ARM11 processor but is available at extremely cheap price. The board is designed with an intention of providing computer education to the remote schools where the PCs are not very commonly used. The idea behind the design is to use the TV screen as the display unit for the Raspberry pi board and hence converting the normal TV into a computer. The board is hence provided with a RCA connector which can be used to connect it directly to a TV screen which is based on PAL and NTSC standard. The board also has a HDMI connector output which can be used to connect the board to a HD TV.
RPi Python Programming 21: The SIM900A AT commands
In the previous tutorial, we covered how to interface a SIM900A GSM-GPRS modem with Raspberry Pi, Arduino, and desktop computers. SIM900A can communicate data with the controlling device over the universal asynchronous receiver/transmitter (UART), I2C, or SPI protocol. The modem is a piece of mobile equipment with an IMEI number that’s capable of all cellular…
RPi Python Programming 20: Interfacing the SIM900A GSM-GPRS modem and hacking earphones
In the previous tutorial, we learned how to use Raspberry Pi’s (RPi) serial hardware port for serial data communication over the universal asynchronous receiver/transmitter (UART) protocol. Most of the embedded devices have the UART port for exchanging console data. In fact, most of the sensor modules that are designed for peer communication with controllers/computers have the…
RPi Python Programming 19: Serial UART communication on RPi’s TTL port
In the previous tutorial, we discussed the universal asynchronous receiver-transmitter (UART) protocol and voltage levels, covering USB-serial boards and other serial adaptors. We also learned how to find a serial port name on Linux, Windows, macOS, and Raspberry Pi (RPi). In this tutorial, we’ll learn how to use the Python Serial library to setup bidirectional…
RPi Python Programming 18 – Serial UART communication on Raspberry Pi’s TTL port
In the previous tutorial, we discussed serial communication protocols available on Raspberry Pi. We discussed the terminology of data communication and defined the terms like ‘port’, ‘bus’, ‘interface’, ‘protocol’ and ‘standard’. We talked about UARTs on Raspberry Pi and how these UARTs are referenced by different serial Linux device names when they are accessed through…
RPi Python Programming 17: Serial communication using UART protocol
In the previous tutorial, we learned how to generate analog output in the form of software PWM when using Raspberry Pi (RPi). We also showed how software PWM can be used to fade an LED. The PWM output can also be used for other applications, such as for speed control of a DC motor or…
RPi Python Programming 16: Analog output and software PWM
In the previous tutorial, we learned how to use digital input with Raspberry Pi. Raspberry Pi (RPi), as an embedded computer, is capable of digital input, digital output, pulse width modulation (PWM), and the implementation of several serial communication protocols (such as UART/USART, I2C, and SPI). In this tutorial, we’ll cover analog output by using PWM with…
RPi Python Programming 15: Interfacing a push button & digital input
In the previous tutorial, we discussed how to use a digital output on Raspberry Pi. We designed a GUI-controlled LED driver, demonstrating how single-board computer features — like high-level language (HLL) such as Python — can control embedded applications. Microcontroller-based embedded applications are typically programmed in low-level languages, such as in Assembly Language or embedded…
RPi Python Programming 14: GUI-controlled LED driver
In the previous tutorial, we covered TTK menus, layout management in the Tk GUI toolkit, and mouse and keyboard events in Tkinter/TTK. We also discussed multi-threading in Python and created our own class of a threading package. This means we can implement our Raspberry Pi (RPi) codes exactly as if they are running on a…
Top 11 Applications Of Raspberry Pi
Raspberry Pi is an amazing credit card-sized development board that can serve varied purposes for hackers, hobbyists, artists, as well as students. One of the most versatile application boards, it is believed that it can only be used for some common programming purposes especially the ones related to IoT or AI. In this blog, we will be breaking that myth and show you the versatility of this system and how it can make a difference to our lives in a long run. Let’s get on with it then.