This project started after the combination of feeling stagnant in learning new hardware, and a concern for the political climate of places like Syria. I understand that for many people in politically unstable or otherwise war torn countries, communicating with family and your community during an emergency can be challenging and life threatening.
I decided that a cheap, easy to build, open source communication device might kick-start some innovative ways of helping people in need who do not have access to all of the communications available in more fortunate areas.
I initially started the project using a Microchip PIC32 microprocessor, but decided to learn a new platform. I ended up using the TI MSP430 due to its cheapness, easy availability, and the fact that I get to learn a new hardware platform. Integrating a MSP430 to a dedicated project (I.E. moved away from a development board) proved to be much easier and required less parts than both the PIC and the other popular choice, the Atmel AVR. I used an LM317T voltage regulator that allows a wide input of voltages to power the unit. It can be powered from anything from an old cellphone batter, a typical car battery, or most conveniently; a 9V battery - giving users many options in an environment likely void of options.
As it stands, I have a complete prototype PCB layed out and looking for a connection. It can transmit over UART to a PC terminal and receive a few parameters. A second board is being built to test the range of the 433MHz serial module and work on traffic flow. Ideally, this system will not depend on a centralized network, but will act as nodes providing a robust network in tense times. These networks will likely be used by communities or families to communicate several things:
1. A "heartbeat" - an RF beacon that can let others know that someone is alive nearby (and possibly stuck under rubble or hiding).
2. GPS Coordinates - GPS modules are cheap, commonly available, and draw little power in normal use.
3. Simple Messaging - I would like to somehow find a way to send simple messages without the need for a full keyboard, possibly have some hard programmed in to the memory.
I decided that a cheap, easy to build, open source communication device might kick-start some innovative ways of helping people in need who do not have access to all of the communications available in more fortunate areas.
I initially started the project using a Microchip PIC32 microprocessor, but decided to learn a new platform. I ended up using the TI MSP430 due to its cheapness, easy availability, and the fact that I get to learn a new hardware platform. Integrating a MSP430 to a dedicated project (I.E. moved away from a development board) proved to be much easier and required less parts than both the PIC and the other popular choice, the Atmel AVR. I used an LM317T voltage regulator that allows a wide input of voltages to power the unit. It can be powered from anything from an old cellphone batter, a typical car battery, or most conveniently; a 9V battery - giving users many options in an environment likely void of options.
As it stands, I have a complete prototype PCB layed out and looking for a connection. It can transmit over UART to a PC terminal and receive a few parameters. A second board is being built to test the range of the 433MHz serial module and work on traffic flow. Ideally, this system will not depend on a centralized network, but will act as nodes providing a robust network in tense times. These networks will likely be used by communities or families to communicate several things:
1. A "heartbeat" - an RF beacon that can let others know that someone is alive nearby (and possibly stuck under rubble or hiding).
2. GPS Coordinates - GPS modules are cheap, commonly available, and draw little power in normal use.
3. Simple Messaging - I would like to somehow find a way to send simple messages without the need for a full keyboard, possibly have some hard programmed in to the memory.