RF-RFID & Zigbee Projects

AGV - Automated Guided Vehicle System based on IoT

Automated Guided Vehicle (AGVs) is computer-controlled system; just another way to sort containers, move products from one location to another, manage short-term storage of items, and deliver them to assembly lines, shipping locations, and warehouses as needed.

The movement the vehicle is done with the help of high torque DC GEAR motor and L298 driver module and it is controlled by RFID reader as well over Wi-Fi operate IoT system. While a respective RFID tag is read at the start point the vehicle moves in the predefined path to the destination. Load cell is used to detect whether the AGV is over loaded. If in case over loading has occurred it give alter and a buzzer to indicate to the operator.

Every container on the vehicle bears an RFID transponder for its unique identification. Vehicles and containers are located in stations at different points in the work area, At the beginning the goods are loaded into the AGV the system checks for any overload if yes it sends an alert to the IoT operating system. If not, when the RFID tag is read the AGV starts to move from source to destination in the predefined path. If any obstacle is detected in the pathway, then also the alert message and buzzer is used to inform the operator. The AGV reaches the destination and goods get unloaded.

The operator can also control the vehicle over IoT system, TCP/IP network from any remote mobile/PC placed, from where the operator send them on their desire way online. As soon as a vehicle arrives at a branch point, a reader installed there detects the transponder and sends back its information to the operator .

Smart Super Market Shopping Cart System using RFID and Zig-bee Technologies

In metro cities we can see you a huge rush at shopping malls on holidays and weekends. This becomes even more when there are huge offers and discounts. Now a days people purchase a variety of items and put them in the trolley. After total purchasing one should approach counter for billing purpose. By using barcode reader the cashier prepares the bill which is a time consuming process .This results in long queues at the billing counters.

This project presents an idea to develop a system in shopping malls to overcome the above problem. To achieve this all products in the mall should be equipped with RFID tags and all trolleys should be equipped with a RFID reader and LCD screen .When one puts any product in the trolley its code will be detected automatically , the item name and cost will be displayed on the LCD, thereby the cost gets added to the total bill. If we wish to remove the product from the trolley, you can take away the product and the amount of that specific product gets deducted from total amount and the same information passes to the central billing unit via zigbee module . Hence the billing can be done in the trolley itself thereby saving a lot of time to the customers.

Wireless RF based Home/Office Automation with SE (Smart Energy) Power Metering system

There is a growing group of wireless RF devices targeted at residential and commercial energy consumers that monitor, control, and automate the delivery and use of energy. The novelty of these Smart Energy (SE) compliant devices is that they can form a dynamic device network regardless of the product manufacture because they use the same SE firmware load on wireless RF devices.

The project aim is to create a breaker-level power metering over wireless device that would sit next to the home's main distribution panel (or subpanel) and measure the power on up to 4 different circuit lines and output the energy data over wireless RF Signals to PC Software. The current is measured in a non-contact manner so that any user could safely install the current sensors.

At the user side, the current and voltage values from the power supply is obtained at the current and voltage transformer respectively. The current and voltage values are sent to the ADC of microcontroller which converts analog to digital values. The power is calculated in the microcontroller with the obtained current and voltage values. The value of power calculated in microcontroller is displayed in the LCD display. Then the controller sends the information to the Owner side by using wireless RF Trans-receiver module. If the power consumed exceeds the fixed power value set up by the user and if the power to one or two phase is cut off, a relay is given by the relay driver circuit and so the power supply is not given to the load. This is indicated by the corresponding message in the LCD display and then tripped. Moreover, At any time user can switch ON/OFF the connected electrical device remotely just by sending predefined command over wireless RF network.

The second RF Trans-receiver module at the owner side gets the power values through wireless radio frequency from the user side RF module and sends it to the PC (database) through TTL to USB converter. The consumed power value is stored in the database in terms of units and cost respectively. If the user did not pay the bill after the due date, tripping information is sent to the user side which is shown in the LCD display.

It suspect that the concept of the RF- SE Power Meter would be extremely useful for landlords and small businesses looking for a low cost way of monitoring multiple buildings or renting out portions of the same home. This system makes it easy and cheap for the commercial building owner to monitor the energy usage.

RF Remote Controlled Dual Mode Robot for Multipurpose Task

This project propose a dual-mode robot that can be operated manually using a RF remote control and can also move automatically avoiding all the obstacles. The robot has some inbuilt intelligence to avoid obstacles by changing its path. It can be use in multiple applications like automatic vacuum cleaner. In such an application the vacuum cleaner will automatically clean the floor, or we can direct it using the RF remote while sitting relaxed on sofa.

The project design consist a RF based remote unit and at Robot side a microcontroller is interfaced to the RF receiver and motor drive circuit with obstacle avoidance sensors for robot movement. RF remote unit is built around encoder IC HT12E, 433MHz RF transmitter module and a few discrete components. Four Switches are interfaced with encoder IC for forward, reverse, left and right motions, respectively. When any switch, say forward, is pressed, the corresponding data is serially transmitted from DOUT pin through the RF transmitter module. A 9V battery is used to power this circuit. At the receiver end, this transmitted signal is received and decoded. The microcontroller unit compares the received code and drives the motors corresponding to the code received. Obstacle detectors detect any object in the way and intimate the microcontroller.

This robot is in manual mode by default. In manual mode, it can be directed by the remote. For each direction there is a dedicated button on the remote. When the robot encounters any obstacle, it stops moving forward. The robot will, however, be able to move in the rest of the directions. To make the robot work in automatic mode, press S1 and S2 simultaneously. In automatic mode, the robot will move in forward direction. If it encounters any obstacle, it will stop. To avoid the obstacle, the robot will automatically move a little back, turn to the right by 90 degrees, move forward, then turn left. After the obstacle is avoided, the robot will continue moving forward. To turn off the automatic mode, press S3 and S4 simultaneously. This algorithm can be further refined for different applications.

Wireless RF Remote Controlled Security Robot

This project is aimed to develop a robotic vehicle using RF technology for remote operation and sensors for security monitoring purpose. The robot is continuous move and monitor along with sensors for human motion sense and obstacle sense, up on sense of any human movement or obstacles, it sends alert to remote user through wireless RF transreceiver interfaced to a microcontroller and it alert with buzzer sound.

The project design involves an advance microcontroller interfaced to RF module and dc motor driver to drive the robotic vehicle. At the transmitting end using push buttons, commands are sent to the receiver to control the movement of the robot either to move forward, backward and left or right etc. At the receiving end two motors are interfaced to the microcontroller where they are used for the movement of the vehicle. The RF transmitter acts as a RF remote control that has the advantage of adequate range with proper antenna, while the receiver decodes before feeding it to another microcontroller to drive DC motors via motor driver IC for necessary work. A PIR Motion sensor is used for monitor the human movement, up on sense any human movement it send interrupt signal to microcontroller and transmit alert signal to remote user through RF trans-receiver modules. Other sensor Ultrasonic sensor is used to monitor any obstacles upon sense robot stop and also send the alert signal to remote user. A buzzer is alarmed with different sound/tone train at the remote user side.

This project can be further enhanced using wireless night vision video camera. Further using DTMF technology, we can control the robotic vehicle by using cell phone. This technology has an advantage over long communication range as compared to RF technology.