KEY MATRIX 4x4

Specification

What		Comments
Identifier	KEY_MATRIX_4_4
Interface	8 GPIO	GPIO 1: L1 GPIO 2: L2 GPIO 3: L3 GPIO 4: L4 GPIO 5: H1 GPIO 6: H2 GPIO 7: H3 GPIO 8: H4 Lx: columns Hx: rows
Provides	key1 key2 key3 key4 key5 key6 key7 key8 key9 key10 key11 key12 key13 key14 key15 key16	1 = key down 0 = key up
Properties	repeat	1 = enable repeat function. When enabled this sensor fires a callback when you hold a key down.
	repeat delay	If repeat function is enabled, the time in msecs that you must to hold a key down for start the repeat function. When this time expires the sensor fires a callback at the specified repeat rate time.
	repeat rate	The repeat rate in msecs.
Callbacks?	yes

Code

km = sensor.attach("KEY_MATRIX_4_4", 40, 41, 42, 43, 44, 45, 46, 47)

km:callback(
   function(data)
      if (data.key1 == 1) then
	     print("key1")
	  end

      if (data.key2 == 1) then
	     print("key2")
	  end

      if (data.key3 == 1) then
	     print("key4")
	  end

      if (data.key4 == 1) then
	     print("key4")
	  end

      if (data.key5 == 1) then
	     print("key5")
	  end

      if (data.key6 == 1) then
	     print("key6")
	  end

      if (data.key7 == 1) then
	     print("key7")
	  end

      if (data.key8 == 1) then
	     print("key8")
	  end

      if (data.key9 == 1) then
	     print("key0")
	  end

      if (data.key10 == 1) then
	     print("key10")
	  end

      if (data.key11 == 1) then
	     print("key11")
	  end

      if (data.key12 == 1) then
	     print("key12")
	  end

      if (data.key13 == 1) then
	     print("key13")
	  end

      if (data.key14 == 1) then
	     print("key14")
	  end

      if (data.key14 == 1) then
	     print("key14")
	  end

      if (data.key16 == 1) then
	     print("key16")
	  end
   end
)