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Showing posts from August, 2010

Micro platforms and comm

Hardware EcoWizard FLEX Mini MICAz Iris Mote NeoMote Sun SPOT Communications ANT 6LoWPAN DASH7 ONE-NET ZigBee Z-Wave Wibree WirelessHART

Arduino

On linux /usr/share/arduino /usr/share/doc/arduino /usr/share/arduino/libraries To install Messenger: download it sudo file-roller open it and navigate to /messenger/arduino/Messenger in the zip extract to /usr/share/arduino/libraries/ Arduino 0019 current rc1 has String object currently Arduino GA is 0018 ATMega8U2 USB OptiBootLoader faster Arduino as a programmer

Wireless technologies

Wifi 802.11 $44, 100Mb, 100M WiFly $44, 100Mb, 100M SHDC memory with WIFI $50 ZigBee 802.15.4 $20, 250 kb, 100M - 1 mile Bluetooth 802.15.1 < $20, 3Mb, 100M Cellular $64 + sevice 2G, 3G GSM, GPRS, EDGE, W-CDMA, UMTS, TDMA, CDMA, CDMA2000 1xRTT, CDMA2000 1xEV-DO, and CDMA2000 1xEV-DV 4G must have target peak data rates of up to approximately 100 Mbit/s for high mobility such as mobile access and up to approximately 1 Gbit/s for low mobility

AVR

AVR site ATmega1284P summary spec sheet

Android resources

See Accessing Resources in Code If all you require is the ability to read raw data (such as a video or audio file), then save the file in the res/raw/ directory and read a stream of bytes using openRawResource(). get an instance of Resources with Context.getResources() never modify the R.java file by hand—it is generated by the aapt tool when your project is compiled. ViewGroup = layout View = widge: button, checkbox, etc.

Fast Arduino servo response

HOWTO On Duemilanove board powered exclusively from USB, the power drops out with the servo powered from the board +5V. Need external power for servos! 1 Orange = PWM 2 Red = +5V 3 Brown = Gnd +-- |1 \ |2 | |3 / +--

Android widgets

Horizontal Slider

Android video capture

slashdot

Android Camera

Take picture Take and save picture

Bluetooth, Wifi interference

Sharing 2.4 GHz band Bluetooth interferes with Wifi typically less than 25% Cisco 20 myths old but simple explanation of the interference issue bluetooth access points

Business Models

Revenue Development The Case Against Free Free! Why $0 is the Future of Business Viral Video Strategies Sales Complexity

Android sensors

Orientation Diagram getOrientation

Arduino programmer

located in /usr/shar/arduino preferences ~/.arduino/preferences.txt To dump all communication during loading set: upload.verbose=true

AvrDude

Can program AVR chips via serial from file. AVRDUDE can be used effectively via the command line to read or write all chip memory types (eeprom, flash, fuse bits, lock bits, signature bytes) or via an interactive (terminal) mode. Using AVRDUDE from the command line works well for programming the entire memory of the chip from the contents of a file, while interactive mode is useful for exploring memory contents, modifying individual bytes of eeprom, programming fuse/lock bits, etc. AVRDUDE tutorial Some info on uploading on the Eclipse page

Reset Circuit

Schematic

Ubuntu Bluetooth pairing

FireFly Linux gtkterm gtkterm -p /dev/rfcomm0 -s 115200 --------------------------- Open System -> Preferences -> Bluetooth Manager Adapter -> Search - be sure remote is discoverable Device -> Pair - accept and confirm Can send files, must confirm on remote end ----------------------------- To connect RN-41 connect USB Applications -> Accessories -> Serial port terminal Configuration -> Port select /dev/ttyUSBx, 115200, 8,N,1 select local echo Enter $$$ to enter command mode on RN-41 should return OK ----------------------------- Open terminal and enter: sudo getty 115200 /dev/rfcomm0 ----------------------------- In Bluetooth Manager select RN-41 device Right click and select SPP - should connect In Serial port terminal turn off local echo and hit Enter - should see login screen ------------------------------ Haven't found command line howto hcitool scan sudo hcitool cc 00:06:66:05:04:62 then right click and pair with pin then right click and

Android Arduino toolkit/library

Amarino

Arduino memory

Practical Arduino pg 365

Arduino IDE Ubuntu

Arduino playground sudo add-apt-repository ppa:arduino-ubuntu-team sudo apt-get update sudo apt-get install arduino

Ubuntu serial port

Download GUI Serial Port Terminal or Command line minicom list connections: dmesg | grep tty

Sensors

Current

Arduino Bluetooth

HOWTO

uControllers

ATmega328P

Robotics

Robot Marketplace Cheap servos

Remote control

Engadget Gizmodo SparkFun Ardunio and sensors $20-150 TINI $109 BasicStamp $60-100 Sensors