Qwiic HAT for Raspberry Pi Hookup Guide Datasheet by SparkFun Electronics

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Qwiic HAT for Raspberry Pi Hookup Guide
Introduction
This Qwiic HAT for Raspberry Pi is the quickest and easiest way to utilize
SparkFun’s Qwiic ecosystem while still using that Raspberry Pi that you’ve
come to know and love. This Qwiic HAT connects the I C bus (GND, 3.3V,
SDA, and SCL) on your Raspberry Pi to an array of Qwiic connectors. It
also has a few important pins on the Raspberry Pi broken out for easy
access. Since the Qwiic system allows for daisy chaining (as long as your
devices are on different addresses), you can stack as many sensors as
you’d like to create a tower of sensing power!
Required Materials
To follow along with this hookup guide, you will need any Raspberry Pi with
2x20 male headers.
2
SparkFun Qwiic HAT for Raspberry Pi
DEV-14459
Raspberry Pi 3
DEV-13825
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A Pi Zero W will also work but you will need to make sure to solder some
male headers to it.
Now you probably didn’t buy the Qwiic HAT if you didn’t have any Qwiic
products to use with it, right? If you don’t have any Qwiic products, the
following might not be a bad place to start.
Finally, you’ll need our handy Qwiic cables to easily connect sensors to
your Qwiic HAT. Below are a few options.
Raspberry Pi GPIO Male
Header - 2x20
PRT-14275
Raspberry Pi Zero W
DEV-14277
SparkFun Environmental
Combo Breakout -
CCS811/BME280 (Qwiic)
SEN-14348
SparkFun Spectral Sensor
Breakout - AS7262 Visible
(Qwiic)
SEN-14347
SparkFun GPS Breakout -
XA1110 (Qwiic)
GPS-14414
SparkFun Qwiic Adapter
DEV-14495
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Required Setup Tools
As a desktop, these devices are required:
USB Mouse
USB Keyboard
HDMI monitor/TV/adapted VGA
5V Power Supply
Suggested Reading
If you aren’t familiar with our new Qwiic system, we recommend reading
here for an overview. We would also recommend taking a look at the
following tutorials if you aren’t familiar with them.
Hardware Overview
The Qwiic HAT has 4 Qwiic connect ports, all on the same I C bus. In
addition to this, some of the pins on the Raspberry Pi are broken out for the
user.
Qwiic Cable - 500mm
PRT-14429
Qwiic Cable - 100mm
PRT-14427
Qwiic Cable - 200mm
PRT-14428
Qwiic Cable - 50mm
PRT-14426
I2
C
A
n introduction to I2C, one of the
main embedded communications
protocols in use today.
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Hardware Assembly
To get started with your Qwiic HAT, simply plug it into the headers on the
Raspberry Pi, make sure that the “USB” arrow on the HAT is pointing
towards the USB on the Raspberry Pi.
Once the HAT is plugged in, you can start plugging in any Qwiic enabled
sensors you might have.
I2C on Raspberry Pi
OS and Library Install
If you’re starting from scratch, with a blank microSD card, you’ll want to
install Raspbian. If you’ve already got a working Raspbian system, skip
ahead to step 3.
1. Download the NOOBS image. As of this writing, it’s at version 2.4.4.
2. Follow the official installation instructions.
3. Follow the Wiring Pi Instructions to get git, update and upgrade your
Rasbpian packages, then install WiringPi.
Be patient – each of these steps takes a while.
Once you’ve got wiringPi installed, run the gpio commands shown below.
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>gpio -v
>gpio readall
It should respond with some information about the wiringPi version and the
Pi that its running on, then draw a table illustrating the configuration for the
pins in the 40-pin connector.
Configuration
Like the SPI peripheral, I2C is not turned on by default. Again, we can use
raspi-config to enable it.
1. Run sudo raspi-config .
2. Use the down arrow to select 5 Interfacing Options
3. Arrow down to P5 I2C .
4. Select yes when it asks you to enable I2C
5. Select OK and then Finish
Once you return to terminal, enter this command
>ls /dev/*i2c*
The Pi should respond with
/dev/i2c-1
Which represents the user-mode I2C interface.
Utilities
There is a set of command-line utility programs that can help get an I2C
interface working. You can get them with the apt package manager.
sudo apt-get install -y i2c-tools
In particular, the i2cdetect program will probe all the addresses on a bus,
and report whether any devices are present. Call i2cdetect -y 1 to probe
the first I C bus, which is what the Qwiic HAT is connected to.
pi@raspberrypi:~/$ i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: 60 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
This map indicates that there is a peripheral at address 0x60. We can read
and write its registers using the i2cget , i2cset and i2cdump commands.
Resources and Going Further
For more information, check out the resources below:
Qwiic Hat Schematic (PDF)
Qwiic HAT Eagle Files (ZIP)
Qwiic System Landing Page
Qwiic HAT GitHub Repository
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Now that you have your Qwiic HAT ready to go, it’s time to check out some
of SparkX’s Qwiic enabled products, many of which are on their way to
becoming good old fashioned SparkFun products.
But I Already Have Sensors!
If you already have a handful of SparkFun sensors and parts? SparkFun
has been putting our standard GND/VCC/SDA/SCL pinout on all our I C
boards for many years. This makes it possible to attach a Qwiic Adapter
that will get your SparkFun I C sensor or actuator onto the Qwiic system.
Here is the list of the boards that have the standard I C pinout and will work
with the Qwiic adapter board:
9DoF Stick IMU - LSM9DS1
9DoF IMU - MPU-9250
6DoF IMU - LSM303C
6DoF IMU - LSM6DS3
Triple Axis Accelerometer - LIS3DH
Triple Axis Magnetometer - MAG3110
Triple Axis Magnetometer - MLX90393
Compass Module - HMC6343
Atmospheric Sensor - BME280
Barometric Pressure Sensor - MS5803-14BA
Barometric Pressure Sensor - T5403
Humidity and Temperature Sensor - Si7021
Digital Temperature Sensor - TMP102
Particle Sensor - MAX30105
Air Quality Sensor - CCS811
ToF Range Finder - VL6180
Haptic Motor Driver - DRV2605L
Micro OLED Display
RGB and Gesture Sensor - APDS-9960
RGB Light Sensor - ISL29125
LED Driver - LP55231
DAC Breakout - MCP4725
Qwiic Micro OLED
SPX-14269
Qwiic Magnetometer -
MLX90393
SPX-14294
Qwiic Mux - PCA9548A
SPX-14293
Qwiic Water-Resistant OLED
SPX-14287
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a1 or i-hookup—guidc?figa=2.25445 Page 7 of 7 2// 7
16 Output I/O Expander - SX1509
Battery Babysitter - BQ24075
Check out this related tutorial:
Raspberry Pi SPI and I2C Tutoria
l
OCTOBER 29, 201
5
How to use the serial buses on your Raspberry Pi.
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https://learn.sparkfun.com/tutorials/qwiic-hat-fo
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i
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