ESP8266 - 16x2 LCD, IR receiver with Apple Remote

[espruino-discuss2]

Posted at 2016-05-24 by Wilberforce

I2C1.setup({scl:NodeMCU.D5, sda:NodeMCU.D4});
var lcd = require("HD44780").connectI2C(I2C1);
lcd.print("Hello World!");
lcd.setCursor(0,1);
lcd.print("ESP8266!");


/*                       I2C1  SPI1
NodeMCU.D1   D5   GPIO5
NodeMCU.D2   D4   GPIO4
NodeMCU.D3   D0   GPIO0                 FLASHBTN / Built in LED
NodeMCU.D4   D2   GPIO2   SDA           Debug Serial - RX1 on FTDI chip
NodeMCU.D5   D14  GPIO14  SCL  CLK          
NodeMCU.D6   D12  GPIO12       MISO
NodeMCU.D7   D13  GPIO13       MOSI         
NodeMCU.D8   D15  GPIO15       CS
NodeMCU.D9   D3   GPIO3
NodeMCU.D10  D1   GPIO1
NodeMCU.A0   D0   GPIOx
*/

//1011101111110000 101010000 10001111
/* Apple white remote 33 bits - spaces added
10111011111100001 0101 000010001111 up
10111011111100001 1001 000010001111 left
10111011111100001 1010 000010001111 play
10111011111100001 0110 000010001111 right
10111011111100001 0011 000010001111 down
10111011111100001 1100 000010001111 menu
longer codes - last 1's are button repeats
*/

var button={5:'up',9:'left',10:'play',6:'right',3:'down',12:'menu'};

require("IRReceiver").connect(NodeMCU.D1, function(code) {
  console.log(code);
  if ( code.length >= 33 ) {
    var l=parseInt(code.slice(1,16),2);
    if ( l === 15344 ) {
        lcd.setCursor(0,1);
      var k=parseInt(code.slice(17,21),2);
      console.log({k:k,b:button[k]});
      lcd.clear();
      lcd.print(button[k]);
    }
  }
});

10111011111100001100100001000111111
{ "k": 9,
  "b": "left"
 }
10111011111100001010100001000111111
{ "k": 5,
  "b": "up"
 }
101110111111000010011000010001111
{ "k": 3,
  "b": "down"
 }
101110111111000011010000010001111
{ "k": 10,
  "b": "play"
 }
101110111111000010110000010001111
{ "k": 6,
  "b": "right"
 }
10111011111100001110000001000111111
{ "k": 12,
  "b": "menu"
 }

[espruino-discuss2]

Posted at 2016-05-24 by Wilberforce

This would work with any Espruino - just need to change the pins.

[gfwilliams]

Posted at 2016-05-24 by @gfwilliams

Nice - thanks! Is this an old Apple remote? I assumed the Apple TV remotes were radio rather than infra-red.

[espruino-discuss2]

Posted at 2016-05-24 by Wilberforce

It is the white remote that came with a gen one Apple TV. I'll take a picture and upload tomorrow.

Attachments:

• image.jpeg

[espruino-discuss2]

Posted at 2016-05-28 by davem

Nice! Which IR sensor are you using?

[espruino-discuss2]

Posted at 2016-05-28 by Wilberforce

http://www.jaycar.co.nz/Active-Components/Optoelectronics/Optocouplers/IR-LED-Receiver/p/ZD1953

IR LED Receiver

CAT.NO: ZD1953
TSOP4136 IR ReceiverConsists of PIN diode, pre-amplifier, AGC, pass filter, and demodulator. The main benefits are high speed data rates, short burst ...

It's the 36 rather than 38, but that was 3x the price and it seems to work fine!

[espruino-discuss2]

Posted at 2019-01-07 by Ollie

Edit : Ignore, different pin choices seem to have sorted receive

Digging up an old thread, but it seems most relevant. I was messing with IR receiver on Puck with no issues, then decided to apply same on NodeMCU ESP8266, with same detection code as used on Puck and the array just fills with false positives, no signal anywhere near. I wondered if you'd encountered anything like this on NodeMCU @wilberforce? You may not remember I understand.