After merging the code from different projects, some of which use open source compilers, I can build my own project with GCC for AVR. The first project consumes 12KB ROM and 1K RAM. I believe the RAM size can be reduced after some optimization. However AVR offers big enough memory size than my expectation. Now I am adding the OTA (Over-the-Air) command parser to the project.

OpenAVL is an AVL (Automatic Vehicle Location)open source project.The OpenAVL is one of my on-going open source projects. This project is written in ANSI C. The prototype board is made up of a low cost GSM M2M module (MC39i) from Siemens/Cinterion, a GPS OEM module from Leadtek and an AVR microcontroller (ATmega128L) from Atmel. It will be ported to Emcelettronica's IperSMS board, which has a PIC18 and a Telit M2M module. I will share my development experiences in these blogs.

Today GPS is involved in many location based services, more and more mobile equipment are integrated GPS feature inside. This article will cover GPS receiver module design based upon existing chip-set, component and firmware/software sources. I will prepare extra article for GPS system design, which cover mobile platforms, system programming, back-end web integration and etc. I will try my best to delivery mentioned content on open source projects.