In this projects, the steps of implementing a wireless camera is explained in detail. You need to following modules to build a wireless camera:
1- 2 XBee adapters
2- XBee shield
3- XBee Explorer
4- JPEG color camera
The XBee adapter helps you create a wireless a point-to-point or mesh network.They have error correction, is configured with AT commands, come in multiple flavors and can create a wireless serial link out of the box! The XBee RF Module was engineered to meet IEEE 802.15.4 standards and support the unique needs of low-cost, low-power wireless sensor networks. Its require minimal power and provide reliable delivery of data between devices.
This module operates within the ISM 2.4 GHz frequency band and are pin-for-pin compatible with each other. Also this module allows a very reliable and simple communication between micro-controllers, computers. Two XBee adapter is used in this project, one at the computer side, and the other at the camera side to send/received the data from computer or camera. The features of the used XBee adapter are:
> 3.3V @ 50mA
> 250kbps Max data rate
> 1mW output (+0dBm)
> 300ft (100m) range
> Built-in antenna
> Local or over-air configuration
> AT or API command set
The XBee Shield simplifies the task of interfacing an XBee with camera. This board works with all XBee modules including the Series 1 and Series 2.5, standard and Pro version. The board also includes LEDs to indicate power and activity on DIN, DOUT, RSSI, and DIO5 pins of the XBee. The reset button is brought out on the shield, and a 12×11 grid of 0.1″ holes are available for prototyping.
This is a simple to use, USB to serial base unit for the XBee line. Also this unit works with all XBee modules including the Series 1 and Series 2.5, standard and Pro version. The purpose from using the XBee explorer to have a direct access to the serial and programming pins on the XBee unit.
allows you to capture and output JPEG images through UART, it’s features:
> VGA/QVGA/160×120 resolution
> Support capture JPEG from serial port
> Default baud rate of serial port is 38400
> 5V power supply
> Size 32X32mm
> Current consumption: 80-100mA
Before start building the circuit, you need to set the basic configurations of the XBee adapter such as the baud rate, high and low destination addresses. The camera and the XBee adapter must have the same baud rate (In this project 38400 is used). Once you done from the configurations, connect the modules together as shown in Fig.4
Connect the control/receiving unit which includes: XBee explorer+XBee unit.
Turn on the camera program (LSY201) from your laptop and start taking pictures. Do not hesitate to Contact me if you have any question.