benwei/blink_by_serial_input_char_a.ino

## blink_by_serial_input_char_a.ino
int led = 13;

void setup()
{
  Serial.begin(9600);//设置波特率为9600bps
  pinMode(led, OUTPUT);
}


void turnon_led() {
  digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);               // wait for a second
  digitalWrite(led, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);               // wait for a second
}


void loop ()
{
  if(Serial.available())
  {
    int lkf = Serial.read();
    switch(lkf)
    {
      case 'a':
       turnon_led();
       break;
    }
  }
}

## cgi-lua_preparation
-- vi /www/cgi-bin/web2ser  -- prepare new file
-- file content below
#!/usr/bin/lua

io.output("/dev/ttyACM0")  --

io.write(os.getenv("QUERY_STRING"))

-- after file saved, type command  "chmod 755 /www/cgi-bin/web2ser" for correct cgi execute permission

## test.html
<html>
<body>
<div style="float:left">
<script>
function sendSer(value){
        document.getElementById("ser").src="/cgi-bin/web2ser?"+value;
}
</script>
<table>
<tr>
<td>
  <input type="button" onmousedown="sendSer('a')" onmouseup="sendSer('a')" value="blink" />
</td>
</tr>
</table>
</body>
</html>

## test.lua
#!/usr/bin/lua
io.output('/dev/ttyACM0')

local step = 0;
while (step < 5) do
io.write('a\r\n')
os.execute('sleep 2')
step=step+1;
end
	int led = 13;

	void setup()
	{
	Serial.begin(9600);//设置波特率为9600bps
	pinMode(led, OUTPUT);
	}


	void turnon_led() {
	digitalWrite(led, HIGH); // turn the LED on (HIGH is the voltage level)
	delay(1000); // wait for a second
	digitalWrite(led, LOW); // turn the LED off by making the voltage LOW
	delay(1000); // wait for a second
	}


	void loop ()
	{
	if(Serial.available())
	{
	int lkf = Serial.read();
	switch(lkf)
	{
	case 'a':
	turnon_led();
	break;
	}
	}
	}
	-- vi /www/cgi-bin/web2ser -- prepare new file
	-- file content below
	#!/usr/bin/lua

	io.output("/dev/ttyACM0") --

	io.write(os.getenv("QUERY_STRING"))

	-- after file saved, type command "chmod 755 /www/cgi-bin/web2ser" for correct cgi execute permission
	<html>
	<body>
	<div style="float:left">
	<script>
	function sendSer(value){
	document.getElementById("ser").src="/cgi-bin/web2ser?"+value;
	}
	</script>
	<table>
	<tr>
	<td>
	<input type="button" onmousedown="sendSer('a')" onmouseup="sendSer('a')" value="blink" />
	</td>
	</tr>
	</table>
	</body>
	</html>
	#!/usr/bin/lua
	io.output('/dev/ttyACM0')

	local step = 0;
	while (step < 5) do
	io.write('a\r\n')
	os.execute('sleep 2')
	step=step+1;
	end