Programming and controlling ethernet and WLAN based Tibbo devices using microcontrollers

OData support
Supervisor:
Szabó Zoltán
Department of Automation and Applied Informatics

Abstract

The topic of my thesis is programming, analysing Ethernet and wireless Tibbo devices, furthermore the representation of solving concrete exercises with these. To block in the exercise; it is to make an Ethernet respectively WIFI serial port converter. However the object is not that easy. We would like to modify and configure this converter to our specific needs, and the programmability of this module makes it much easier. These devices can be easily adapted to any other task by installing a new software.

Why exactly this one? UART (Universal Asynchronus Receiver/Transmitter), namely serial port or USART (Universal Synchron/Asynchron Receiver/Transmitter) have been existing for a long time by computers. This form of communication enables duplex communication among the devices. Due to the appearance of microcontrollers serial port communication gathered much bigger ground. Many devices have been using this standard up to this day because two cables Rx (Receive data), Tx (Transmit data) plus ground are sufficient to communication However SPI and I2C standard can handle much bigger speed (SPI 10 Mbit/sec > I²C 3400 Kbit/sec > UART 115 Kbit/sec), many old and new sensors and interlopers – that can be connected to microcontroller – use this stale standard. That is why we need the Tibbo devices that I analysed. As a virtual serial port it makes a connection among the computer’s network device and the serial communication utilizing devices.

Ethernet communication is really prevalent nowadays thanks to its high data transfer speed, and the long distance, wireless transference. The range of data transmit - in case of 100 Mbit /sec Ethernet connection and crossover cable - is 100 meters (connections that are faster than 1 Gbit/sec or fibreglass connections can reach 2-5 kilometres of range), which exceeds the prescription of RS-232 standard , 15 meters. Naturally this range can be extended, but this topic is going to be discussed in the academic summary.

The academic part is about the communication standards and protocols that I used, furthermore the execution of the object that is an Ethernet – serial port, respectively WIFI – serial port converter. Later on this will be used in a bigger project, where it will only have to communicate. The advantage of this application is that it is comparatively easy to handle and it can be adapted to our specific needs.

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