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Available for immediate delivery while stock lasts. No dispatch during the company holiday from 16/09/2022 to 16/10/2022.

46 in stock
updated: 29.08.2022

RoHS

CMPS14 - Tilt Compensated Magnetic Compass

Devantech

Overview

Offering equally impressive performance to the CMPS12, but also allowing background calibration to be disabled and operation with a fixed calibration profile.

Powered by the Bosch BNO080.

CMPS14
Voltage 3.3V-5V
Current 18mA Typ.
Resolution 0.1 Degree
Accuracy
Signal levels 3.3V, 5V tolerant
I2C mode up to 400khz
Serial mode 9600, 19200, 38400 baud

Introduction

The CMPS14 is Devantech's 5th generation tilt compensated compass. Employing a 3-axis magnetometer, a 3-axis gyro and a 3-axis accelerometer. At the core of the module is the superb BNO080 running algorithms to remove the errors caused by tilting of the PCB. The module also allows the calibration to be stopped and instead rely on a static calibration profile.
Power supply requirements are flexible, you can feed between 3.3 - 5v and the module draws a nominal 18mA of current. A choice of serial or I2C interfaces can be used for communication.

Mode selection and connections

Serial or I2C mode is easily selected with the state of the mode pin. Note the CMPS14 looks at the mode selection pin at power-up only.
For I2C the mode pin can be left open or pulled to the supply voltage, for serial mode the mode pin should be connected to 0v ground.

Compass CMPS12 connections

For details on use of the CMPS12 see the manufacturer's website (link below)


I2C commands in Linux

Install I2C on your computer and enable it. Then use for example the following simple commands:

~# i2cdetect -y 0
This command detects the devices (if you're using multiple devices, mention the number of devices which are connected in place of '0').

~# i2cset -y 0 xxxx 255
This simple command writes the byte value 255 to the I2C device at address xxxx hex on the i2c bus 0 (/dev/i2c-0).

~# i2cget -y 0 xxxx
This command reads a byte from an I2C device at address xxxx hex on the i2c bus 0 (/dev/i2c-0).


Testing CMP14 with Raspberry Pi 4

Raspberry Pi 4 has various pins such as VCC, GND, SDA and SCL .

Connect 5V Pin 2 or 5V Pin 4 at Pi to Vcc at CMP14 (red cable in image)
Connect GPIO 2 SDA (data) at Pi with SDA at CMP14 (green cable in image)
Connect GPIO 3 SCL (clock) with SCL at CMP14 (blue cable in image)
Connect Pin 6 GROUND at Pi with Ground at CMP14. (black cable in image)

DEV-CMPS14_connection_to_RaspberryPi


Now follow the steps below in the command line of the Raspberry Pi 4:

sudo apt-get update

sudo apt-get upgrade

sudo apt-get install i2c-tools

sudo raspi-config
enable I2C in the menu

i2cdetect -l

i2cdetect -y 1
The address of the CMP14 should be shown as HEX value such as 0x60. If it is not shown, then the CMP14 is probably disconnected. If disconnected, check connections and reboot the Pi.

i2cget -y 1 0x60 0x00
to read Software version
result: 0x06, which means 6.

i2cget -y 1 0x60 0x01
to read the Compass Bearing 8 bit, i.e. 0-255 for a full circle
result: 0x1F, which means 31

i2cget -y 1 0x60 0x06
to read the Magnetometer X axis (uTesla), 16 bit signed integer (register 0x06 high byte) Q point 4
result: 0xFE, which means 254

i2cget -y 1 0x60 0x16
to read the Gyroscope raw Z axis output, 16 bit signed integer (register 0x16 high byte)
result: 0x00, which means 0

i2cget -y 1 0x60 0xA1
to read the Baud rate
result: 0x06, which means OK

i2cget -y 1 0x60 0x26
to read the Gyroscope calibrated X axis output, 16 bit signed integer (register 0x25 high byte) Q point 9
result: 0x02, which means 2

DEV-CMPS14-raspberryPi-results


PCB Board Dimensions

The following diagram shows the CMPS12 PCB dimensions and mounting hole positions.
Compass CMPS12 technical drawing


Manufacturer's data

Technical Specification - link to the manufacturer

Accessories

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Product information for: CMPS14 - Tilt Compensated Magnetic Compass

Publishing date (date of last technical specification): 2019-02-26
Length: 25 mm
Width: 19 mm
Height: 4 mm
Weight: 3 g
Shipping weight: 100 g
Manufacturer: Devantech
Brand: ROBOT ELECTRONICS
Article number: DEV-CMPS14
Manufacturer's part number: CMPS14

The article CMPS14 - Tilt Compensated Magnetic Compass is listed in the following categories:

Sensors > Compass

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Order online now

EUR 45.98 EUR 38.64
Price incl. VAT Price excl. VAT
plus EUR 5.95 shipping costsplus EUR 5.00 shipping costs

Immediate delivery

Available for immediate delivery while stock lasts. No dispatch during the company holiday from 16/09/2022 to 16/10/2022.

46 in stock
updated: 29.08.2022

Information on currency

EUR 45.98 = GBP 39.32 EUR 38.64 = GBP 33.04 (€1=GBP0.85505)
EUR 45.98 = USD 52.64 EUR 38.64 = USD 44.24 (€1=USD1.1448)
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EUR 45.98 = AUD 72.14 EUR 38.64 = AUD 60.63 (€1=AUD1.5690)

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About ROBOT ELECTRONICS

ROBOT ELECTRONICS is a brand by English manufacturer Devantech Ltd., based in Norfolk. Product range comprises sensors, in particular ultrasonic or compass, servocontrollers as well as small robot drive systems or relay modules with various interfaces. Sensors are produced in England and are of consistently high quality.

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