ubiq_uitous communication, wearable and multimedia systems

The board uses a bootloader that lets you use a terminal program (e.g. minicom, ZTerm) to execute simple commands.

The idea is to have a simple method for firmware updates - e.g. with a built-in bootloader and dfu-programmer.

Might use an AT90USB1287 (on an ATMEL USB Key) or an ATMega2560 board.

I have modules operating at 433 MHz as well as 868 MHz

Programming is done via the dfu-programmer software - just tested it on OSX.

I’m programming a TV remote that has IR and RF capabilities.

The video shows that changing the display state can either be done locally (by pushing a button) or by receiving data via the Bluetooth RFCOMM link. On a state change data is also transmitted via this link. For the Arduino this is done by just using the serial port.

See the Arduino code below:

#include <S65Display.h>

S65Display lcd;
int state=0;

const int button1_pin=2;
const int button2_pin=3;

void drawText_0(void)
{
  lcd.drawTextPGM(30, 50, PSTR("State 0"), 2, RGB(0, 0, 255), RGB(255, 255, 255));
}

void drawText_1(void)
{
  lcd.drawTextPGM(30, 50, PSTR("State 1"), 2, RGB(0, 0, 255), RGB(255, 255, 255));
}

void setup()
{
  state=0;
  //init LCD
  lcd.init(4); //spi-clk = Fcpu/4

  //clear screen
  lcd.clear(RGB(255, 255, 255));

  drawText_0();
  pinMode(button1_pin, INPUT);
  pinMode(button2_pin, INPUT);
  Serial.begin(9600);
}

void loop()
{
  static byte recvd_byte=' ';

  if (Serial.available() > 0)
  {
    recvd_byte=Serial.read();
  }

  if ((state == 0) && ((digitalRead(button2_pin) == LOW) || (recvd_byte=='1')))
  {
    state=1;
    drawText_1();
    Serial.println("State 1");
    recvd_byte=' ';
  }
  if ((state == 1) && ((digitalRead(button1_pin) == LOW) || (recvd_byte=='0')))
  {
    state=0;
    drawText_0();
    Serial.println("State 0");
    recvd_byte=' ';
  }
}

This is work in progress - video of setup in operation to follow.

The photo has additional notes on Flickr.

The module will enable wireless connectivity from e.g. an MCU / Arduino to an iPhone via the standard WLAN way.

There is more info on the Flickr page that you reach when clicking on the photo.

Using the standardized Arduino boards and development environment can speed up things - while still being cost-efficient and flexible.

This is work in progress - the vehicle will soon be controlled via a Bluetooth link.

Whereas originating an RFCOMM connection from a Linux system using the Bluez stack was familiar to me - I never did things the other way round.

The screenshot shows how a serial connection gets advertised with sdptool, a OSX system connects using minicom and finally there is a duplex connection with the “screen” utility on the Linux side.

Best viewed on Flickr in “original size”.

Assembled two versions of a robotic vehicle that uses a mobile phone (Android G1 or Symbian S60 Nokia E71)

The first version uses an Android G1 - may communicate via its serial port or Bluetooth.

The second version makes use of Python running on recent Symbian S60 devices. It may use Bluetooth or IrDA for the “phone 2 motor control” communication path.

The photos have notes on Flickr.