Difference between revisions of "Low-cost Digital Compass Module"

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(Overview)
 
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[[File:LOW-COST DIGITAL COMPASS MODULE.jpg|thumb|400px|right]]
 
[[File:LOW-COST DIGITAL COMPASS MODULE.jpg|thumb|400px|right]]
 
This is a low cost digital compass with UART and IIC interface, it's easy to use with external controler like Arduino,IFLAT32.
 
This is a low cost digital compass with UART and IIC interface, it's easy to use with external controler like Arduino,IFLAT32.
 +
 +
Go shopping [http://imall.iteadstudio.com/im120712009.html Low-cost Digital Compass Module (IM120712009)]
  
 
==Features==
 
==Features==
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==Hardware ==
 
==Hardware ==
http://imall.iteadstudio.com/media/wysiwyg/Products/Modules/digital_compass_module.jpg
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[[File:LOW-COST DIGITAL COMPASS MODULE1.jpg]]
  
 
==Serial Communication Protocol==
 
==Serial Communication Protocol==
  
Baud rate: 9600 bps Parity: N data bits: 8 Stop bit: 1
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'''Baud rate:'''
  
Command
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9600 bps Parity: N data bits: 8 Stop bit: 1
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 +
'''Command'''
  
 
0x31: the first angle measurement
 
0x31: the first angle measurement
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0x03 + 8bit:  Setting the magnetic declination high 8 bit
 
0x03 + 8bit:  Setting the magnetic declination high 8 bit
 
0x04 + 8bit:  Setting the magnetic declination low8 bit
 
0x04 + 8bit:  Setting the magnetic declination low8 bit
Return Data
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 +
'''Return Data'''
  
 
Byte0: 0x0D
 
Byte0: 0x0D
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Byte6: 0x30 ~ 0x39 decimal point (ASCII 0 ~ 9)
 
Byte6: 0x30 ~ 0x39 decimal point (ASCII 0 ~ 9)
 
Byte7: 0x00 ~ 0xFF checksum (only lower 8bit)  
 
Byte7: 0x00 ~ 0xFF checksum (only lower 8bit)  
You can use the Foca or USBtoTLL moudle to connect your PC with this moudle.
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 +
You can use the [[Foca]] or USBtoTLL moudle to connect your PC with this moudle.
  
 
==IIC Communication Protocol:==
 
==IIC Communication Protocol:==
 +
The IIC communication, the module is equivalent to 24C04, EEPROM memory. And you
 +
can read the different address to get the information you need.
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 +
{| class="wikitable"
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|-
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| align="center" style="background:#f0f0f0;"|'''Address'''
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| align="center" style="background:#f0f0f0;"|'''Data'''
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|-
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| 0x00||-
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|-
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| 0x01||Angle value high 8bit
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|-
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| 0x02||Angle value low 8bit
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|-
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| 0x03||Magnetic declination high 8bit
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|-
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| 0x04||Magnetic declination low 8bit
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|-
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| 0x05||-
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|-
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| 0x06||-
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|-
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| 0x07||Calibration Level
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|}
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===IIC command:===
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{| class="wikitable"
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|-
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| align="center" style="background:#f0f0f0;"|'''Command'''
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| align="center" style="background:#f0f0f0;"|'''Description'''
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|-
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| 0x00+0x31||Angle measurement
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|-
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| 0x00+0xC0||Start calibration
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|-
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| 0x00+0xC1||Stop calibration
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|-
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| 0x00+0xA0+0XAA+0XA5+0XC5||Restore default setting
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|-
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| 0x00+(0xA0+0XAA+0XA5+IIC_ADDR)||Change IIC address of the module
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|-
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| 0x03+ 8bit||Magnetic declination changes (high 8bit)
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|-
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| 0x04+ 8bit||Magnetic declination changes (low 8bit)
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|}
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*Default IIC address is 0xE0.
  
 
==Download==
 
==Download==
 +
[ftp://imall.iteadstudio.com/Modules/IM120712009/DS_IM120712009.pdf Datasheet]
  
 
==Useful Links==
 
==Useful Links==

Latest revision as of 08:11, 11 June 2014

Overview

LOW-COST DIGITAL COMPASS MODULE.jpg

This is a low cost digital compass with UART and IIC interface, it's easy to use with external controler like Arduino,IFLAT32.

Go shopping Low-cost Digital Compass Module (IM120712009)

Features

  • Small size
  • Uart or IIC doulbe output/control interface
  • 3-5V Voltage comaptible

Specifications

Measuring range 0-360 °
Resolution 0.1
Accuracy
Power supply 3V-5V DC
Frequency response 25Hz
Current 5 V--15mA 3V--8 mA
Size 25.6mm×25.6mm

Hardware

LOW-COST DIGITAL COMPASS MODULE1.jpg

Serial Communication Protocol

Baud rate:

9600 bps Parity: N data bits: 8 Stop bit: 1

Command

0x31: the first angle measurement 0xC0: calibration of the magnetic field start 0xC1: the end of the calibration magnetic field 0xA0-0XAA-0XA5-0XC5: Restore default setting 0xA0-0XAA-0XA5-IIC_ADDR: IIC address of the module change 0x03 + 8bit: Setting the magnetic declination high 8 bit 0x04 + 8bit: Setting the magnetic declination low8 bit

Return Data

Byte0: 0x0D Byte1: 0x0A Byte2: 0x30 ~ 0x33 angle of one hundred (ASCII 0 ~ 3) Byte3: 0x30 ~ 0x39 angle of ten (ASCII 0 ~ 9) Byte4: 0x30 ~ 0x39 angle a bit (ASCII 0 ~ 9) Byte5: 0x2E (ASCII code decimal point) Byte6: 0x30 ~ 0x39 decimal point (ASCII 0 ~ 9) Byte7: 0x00 ~ 0xFF checksum (only lower 8bit)

You can use the Foca or USBtoTLL moudle to connect your PC with this moudle.

IIC Communication Protocol:

The IIC communication, the module is equivalent to 24C04, EEPROM memory. And you can read the different address to get the information you need.

Address Data
0x00 -
0x01 Angle value high 8bit
0x02 Angle value low 8bit
0x03 Magnetic declination high 8bit
0x04 Magnetic declination low 8bit
0x05 -
0x06 -
0x07 Calibration Level

IIC command:

Command Description
0x00+0x31 Angle measurement
0x00+0xC0 Start calibration
0x00+0xC1 Stop calibration
0x00+0xA0+0XAA+0XA5+0XC5 Restore default setting
0x00+(0xA0+0XAA+0XA5+IIC_ADDR) Change IIC address of the module
0x03+ 8bit Magnetic declination changes (high 8bit)
0x04+ 8bit Magnetic declination changes (low 8bit)
  • Default IIC address is 0xE0.

Download

Datasheet

Useful Links