Difference between revisions of "Sensor-Dot Matrix-S2"

• General Pin Out is the standard pin out of a Sensor / Trinket connector.
• Sensor / Trinket's Pin Out is this specific Sensor / Trinket's wiring in relation to the General Pin Out.
• SIGNAL-A / SIGNAL-B are signals that could be digital input, digital output, analog input or analog output. Or special signals such as serial communication (SoftwareSerial, IIC (I2C), etc) or other special signals.
• Not Connected refers to the Pin not being used for this particular Sensor / Trinket.
• Read more about the hub module.

• Sensor voltage
  • 5V working voltage
• Sensor current
  • 300mA at most

• Sensor size
  • Size of the board: 60mm*60mm
  • 1.27mm-spacing 4Pin interface connected with sensorhub

• Function description
  • 8x8 dot matrix
  • The brightness of each point is 32-grade adjustable
  • Supports IIC communication protocol, the IIC address is settable（1~64）, and the dot matrix sequence adopts rectangular plane coordinate system.
  • With 2 IIC interfaces onboard, which make the cascade of multiple dot matrix easy.

• Connection
  • This sensor can be connected to the I2C interface of the core.
  • The cascade of multiple sensors is supported, 64 at most.

Documents

• Schematic diagram: File:Sensor-Dot Matrix-S2 Test.zip
• You can experiment with the sample programs in the following IDE libraries on your own : _01_Microduino_DotMatrix

Development

Program Download

• Download and unzip the program File:Sensor-Dot Matrix-S2 Test.zip

Programming

• Follow the Software Getting Started Guide.
• Select the Board, Processor and Port.
• Click [File]->[Open], browse to the project program address, and click "Dot Matrix-S2.ino" to open the program.
• After confirming all these items are correct, click "→" to download the program to the development board.

Hardware Setup

• Referring to the following diagram, connect the Sensor-Dot Matrix-S2 to the I2C interface of Microduino-Sensorhub.

Method to Set the Address of the Dot Matrix

• The range of the address of the dot matrix is 1~64.
• After being powered, the number of the green points displayed on the dot matrix represents the address of the dot matrix.
• During 3s after the dot matrix is powered, pressing the button on the back can enter address configuration state, and at this time, the dot matrix changes into white.
  • Pressing the button slowly （the interval is larger than 0.5s）will add the address
  • Pressing the button quickly（the interval is less than 0.5s）will reduce the address
• After setting the address, long press the button for 3s, to exit the address configuration state.

Introduction of the Code

• Define the IIC address of single dot matrix.

 uint8_t Addr[MatrixPix_X][MatrixPix_Y] = {  //1x1
   { 64}
 };

• Define the IIC address of 2x2 cascade dot matrix.

 uint8_t Addr[MatrixPix_X][MatrixPix_Y] = {  //2x2
   { 64, 63},
   { 62, 61}
 };

• Define the IIC address of 1x4 cascade dot matrix.

 uint8_t Addr[MatrixPix_X][MatrixPix_Y] = {  //1x4
   { 64, 63, 62 , 61}
 };

• Get the number of devices which have already been connected.

 int16_t getMatrixNum()

• Get the IIC address of devices which have already been connected

 getDeviceAddr(_a)				//num

• Get the number of the dot matrix on X axis.

 getWidth()

• Get the number of the dot matrix on Y axis.

 getHeight()

• Set the on or off of the dot matrix coordinate pixel

 setLed(_row, _col, _state)			//row, col, state

• Set the brightness of the dot matrix coordinate pixel

 setLedBrightness(_row, _col, _value)	//row, col, value

• Clear the screen

 clearDisplay()

• Set the brightness of the dot matrix

 setBrightness(_value)			//value

• The characters are displayed as follow

 writeString(_c, _t, _col)			//[char*], time, col

• Hex bitmap display

 drawBMP(_row, _col , _w, _h, logo)		//row, col, width, height, file

• BMP display（You can refer to The dot matrix module displays BMP color map）

 drawBMP(_row, _col, logo)			//row, col, file

• Use function to display a solid rectangle

 drawBox(_row, _col, _w, _h)			//row, col, width, height

• Draw a solid rounded rectangle.

 drawRBox(_row, _col, _w, _h, _r)		//row, col, width, height, rad

• Draw a hollow rectangle

 drawFrame(_row, _col, _w, _h)		//row, col, width, height

• Draw a rounded hollow rounded rectangle

 drawRFrame(_row, _col, _w, _h, _r)		//row, col, width, height, rad

• Draw a hollow circle.

 drawCircle(_row, _col, _r)			//row, col, rad

• To draw a solid circle

 drawDisc(_row, _col, _r)			//row, col, rad

• To draw a straight line

 drawLine(_row, _col, _row1, _col1)		//row start, col start, row end, col end

Application

• Open Source LED Dot Matrix Screen
• Open Source LED Dot Matrix Clock

Gallery