SparkFun sensor kit

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format: Markdown categories: sensors sensor devkit Workbenches toc: yes title: SparkFun Sensor Kit ...

Introduction

ehwe-labs using sensors from SparkFun's Sensor Kit with BusPirate as HW-interface for ehwe.

Part number: DEV-13754

• Product page
• Bus Pirate I2C
• Bus Pirate I2C guide (old)

I2C pin-out for the Bus Pirate socket:

Schematic:

*Click for full schematics (Dangerous prototypes v3.5)*

BusPirate board (SparkFun version):

*Note: Mirrored compared to above schematic. Also note that the key-notch **points inwards** on ``Dangerous Prototype's Buspirate``, i.e. the whole connector is rotated 180 compared to ``SparFun's``. See the [Dangerous prototype v3.5](../bp_schematics_pcb/Brd-BusPirate-v3.5.png) board for comparison.*

Table of pins we'll use:

Pin#	Name	Dir	Circuit Description
3	MOSI	↔	SDA - Serial Data
4	CLK	→	SCL - Serial Clock
10	GND	⏚	GND - Signal Ground
9	3v3	P	SWV33 - Power (switch able)
5	AUX	→	AUX1 - Alternative Power (switch able)
6	VPU	←	VEXTERN - Voltage to pull-up grid

SPI pin-out for the Bus Pirate socket:

Under contruction

Labs

I2C chips

Prerequisites:

SDA and SCL need pull-up resistors to operate directly with the BusPirate. This can be achieved either by connecting external pull-up resistors of 10K to each pin or by following this guide:

• BP built-in pull-up's

I.e. for BP with HW version < 4, AUX pin can be connected to VPU and pull-up enabled/disabled using the A/a command. Pins are located conveniently opposite of each other which fits perfectly for a jumper.

Labs

• Triple Axis Magnetometer Breakout - HMC5883L

SPI chips

Under contruction

Labs

• Triple Axis Accelerometer Breakout - ADXL345