Grove - Encoder
Introduction
3.3V 5.0V Digital
This module is an incremental rotary encoder. It encodes the rotation signal from the
axis and output the signal by electronic pulse. The Grove – Encoder is one of the
Grove series and has a standard Grove interface. When you need to add a rotary
knob to your project, for example a volume knob for a speaker, a selection panel or a
digital input, this will be your first choice.
Features
• Incremental encoder.
• Grove Interface.
• 360 degree rotary.
Tip
More details about Grove modules please refer to Grove System
Specifications
Item
Min
Typical
Max
Unit
Voltage
4.5 5 5.5
V
Current
10
20
30
mA
Dimension
20x 20
mm
Net Weight
12
g
Raspberry
Pi
LinkIt
ONE
Platforms Supported
Arduino Wio BeagleBone
Caution
The platforms mentioned above as supported is/are an indication of the module's hardware or theoritical compatibility. We only
provide software library or code examples for Arduino platform in most cases. It is not possible to provide software library /
demo code for all possible MCU platforms. Hence, users have to write their own software library.
Getting Started
This Grove-Encoder is very easy to use with the Encoder Lib designed by
seeedstudio. Simply connect this module to the D2 connector of Base Shield and you
can start using. The following is a introduction of how to make a Circular LED bar.
• This Circ ul ar LED bar c onsi sts of an Enc oder and a Grove-CircularLED module. Connect
the two modules to Base shield as the following picture:
• In the project, the TimeOne Lib and Enco der Lib and CircularLED Library are
needed. Download all the librarys and install them to your Arduino IDE.
• Restart the Arduino IDE and open the example by the path: File->Examples-
>Encoder->EncodeCircuiBar.
#include <CircularLED.h>
#include <Encoder.h>
#include <TimerOne.h>
CircularLED circularLED;
unsigned int LED[24];
int index_LED;
void setup()
{
encoder.Timer_init();
}
void loop()
{
if (encoder.rotate_flag ==1)
{
if (encoder.direct==1)
{
index_LED++;
if (index_LED>23)
index_LED=24;
SenttocircularBar(index_LED);
}
else
{
index_LED--;
if(index_LED<0)
index_LED=0;
SenttocircularBar(index_LED);
}
encoder.rotate_flag =0;
}
}
void SenttocircularBar(int index)
{
for (int i=0;i<24;i++)
{
if (i<index)
{
LED[i]=0xff;
}
else
LED[i]=0;
}
circularLED.CircularLEDWrite(LED);
}
• Upload it to your Ardui n o/Seeedui n o. You can see:
Note
It is able to generate another signal when it is being pressed down. However due to the
limitation of the number of Grove signal cables, the module is made without output of this
signal.
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