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manually add livePreview sketch

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content/hardware/02.hero/boards/uno-r4-wifi/tutorials/led-matrix
- led-matrix.md

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Lines changed: 23 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -282,7 +282,29 @@ We have developed a tool that is used to generate frames and animations to be re`
`282`	`282`
`283`	`283`	`To use the tool you need to upload the following sketch, allowing the board to read serial inputs send by the browser.`
`284`	`284`
`285`		`-<CodeBlock url="https://github.com/arduino/ArduinoCore-renesas/blob/main/libraries/Arduino_LED_Matrix/examples/LivePreview/LivePreview.ino" className="arduino"/>`
	`285`	+```arduino
	`286`	`+#include "Arduino_LED_Matrix.h"`
	`287`	`+`
	`288`	`+ArduinoLEDMatrix matrix;`
	`289`	`+`
	`290`	`+void setup() {`
	`291`	`+ Serial.begin(115200);`
	`292`	`+ matrix.begin();`
	`293`	`+}`
	`294`	`+`
	`295`	`+uint32_t frame[] = {`
	`296`	`+ 0, 0, 0, 0xFFFF`
	`297`	`+};`
	`298`	`+`
	`299`	`+void loop() {`
	`300`	`+ if(Serial.available() >= 12){`
	`301`	`+ frame[0] = Serial.read() \| Serial.read() << 8 \| Serial.read() << 16 \| Serial.read() << 24;`
	`302`	`+ frame[1] = Serial.read() \| Serial.read() << 8 \| Serial.read() << 16 \| Serial.read() << 24;`
	`303`	`+ frame[2] = Serial.read() \| Serial.read() << 8 \| Serial.read() << 16 \| Serial.read() << 24;`
	`304`	`+ matrix.loadFrame(frame);`
	`305`	`+ }`
	`306`	`+}`
	`307`	+```
`286`	`308`
`287`	`309`	`[Click here](https://ledmatrix-editor.arduino.cc) to go to the LED Matrix tool.`
`288`	`310`

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