1. Copying this code section shown below from web page [1] causes writer to freeze every time:

Detailed Description 	
(Manufacturer # SENSHD-01 )

100% Arduino Compatible
Servo Breakout Connectors (6 with PWM)
Sensor Breakout Connectors (5 Analog, up to 14 Digital)
6-pin Bluetooth Module Connector
6-pin APC220 RF Module Connector

End of code section


2. Ditto for this code section shown below from web page [2]

Detailed Description 	
(Manufacturer # BTH-01 )

Highlights:

    8-bit AVR RISC-based microcontroller running at 16 MHz
    Bluegiga WT11 class 1 Bluetooth 2.1 + EDR module
    Input voltage can be as low as 1.2V
    Connects to a computer via Bluetooth serial COM
    ICSP header for programming microcontroller
    Compatible with existing Arduino software libraries
    Compatible with the Ethernet and Motor Controller Shields

blah, blah, blah

The input and/or output pins are brought out to pre-mounted headers, which enable a convenient way to prototype projects without the need of soldering or desoldering.

End of code section


3. Does not freeze with this, from page [3]:

Detailed Description 	
(Manufacturer # GYROS-01 )

Features:

    Plug and play with OSEPP I2C Expansion Shield
    X-, Y-, Z- Axis angular rate gyros sensor
    Programmable angular rate sensors with full-scale-range of +/-250, 500, 1000, or 2000 °/s
    16-bit ADC for digitizing sensor output, sample rate programmable from 8000 samples/sec down to 3.9 samples per second
    Supports I2C interfacing with 2 programmable 7-bit address of 0?68 or 0?69
    Provides pass-through connector to support daisy chaining of multiple sensors from the OSEPP Sensor Module family
    Provides 0.1" breakout points for power and I2C interface pins access

End of code section


[1] http://frys.com/product/8404768?site=sr:SEARCH:MAIN_RSLT_PG
[2] http://frys.com/product/6911517?site=sr:SEARCH:MAIN_RSLT_PG
[3] http://frys.com/product/7021191?site=sr:SEARCH:MAIN_RSLT_PG