user65720: I have a Nokia 5110 LCD which is using this display PCD8544, I am using a arduino yun and johnny five I have hooked up the following pins. So far with my node app all that happens is the lcd lights up. I am not sure if maybe the lcd is not supported with johnny five, if I have a pin wrong. I followed this site for the pin setup https://lastminuteengineers.com/nokia-5110-lcd-arduino-tutorial/ Any help would be greatly appreciated. This is my first attempt with Johnny five and second attempt at hooking anything up to a bread board. Hope we can get this working. Thanks
Here is my code
const five = require('johnny-five');
const board = new five.Board();


board.on("ready", function() {

    lcd = new five.LCD({
      controller: "PCF8574"
    });

    lcd.print("Hello");
  });

Here is my configuration
blue         =  pin 7          sclk     (serial clock(CLK)) 10 om
white        =  pin 6          DN(MOSI) (Serial data in) 10om
grey         =  pin 5          D/C      (Mode select) 10om
orange       =  pin 4          RST      (Reset) 10om
yellow/red   =  pin 3          SCE      (Chip select) 10om
yellow-short =  power strip +  LED      (backlight supply) 1kom
green/black  =  gnd / strip - 
blue/power   =  3.4v power + 330om

Here is are some images of the setup



Update so my configuration looks more like this now
blue         =  pin 7          sclk     (serial clock(CLK)) 10k
white        =  pin 6          DN(MOSI) (Serial data in) 10k
grey         =  pin 5          D/C      (Mode select) 10k
orange       =  pin 4          RST      (Reset) 10k
yellow/red   =  pin 3          SCE      (Chip select) direct
yellow-short =  power strip +  LED      (backlight supply) 330
green/black  =  gnd / strip - 
blue/power   =  3.4v power powerstrip direct


user40646: Arduino Yun is a ATMega32U4-based board, like other ATMega32U4-based Arduino boards, such as Arduino Leonardo, Micro, the SPI is only available on the ICSP header:
MOSI - Yun has it on ICSP Pin 4
MISO - Yun has it on ICSP Pin 1
SCK - Yun has it on ICSP pin 3
SS - Yun has no dedicated pin, use any digital data pin

You can find out the ICSP header pin assignment at Arduino SPI reference page. So here is the connection between Arduino Yun and LCD5110
Yun               LCD 5110
ICSP pin3         CLK(SCK)
ICSP pin 4        DN(MOSI)
any GPIO pin      D/C (see note 1)
RST               RST
any GPIO pin      SCE(SS) (see note 1)
any GPIO pin      Backlight (via a 330 ohm resistor) (see note 2)
GND               GND
3v3               VCC


Note 1: Although you could use any GPIO for D/C and SCE, you should consult the library that you are using to see what pin the library used for the data/command line and SS line.
Note 2: Connecting to a GPIO pin allows you to turn on and off the LED backlight, you could ignore the connection if you don't want the backlight, or you could connect it directly to 3v3 via a resistor if you want backlight on permanently

If you still have problem in using the LCD5110, please update your question with complete code and the library that you are using. 

65720: <p>I have a Nokia 5110 LCD which is using this display <code>PCD8544</code>, I am using a arduino yun and johnny five I have hooked up the following pins. So far with my node app all that happens is the lcd lights up. I am not sure if maybe the lcd is not supported with johnny five, if I have a pin wrong. I followed this site for the pin setup <a href="https://lastminuteengineers.com/nokia-5110-lcd-arduino-tutorial/" rel="nofollow noreferrer">https://lastminuteengineers.com/nokia-5110-lcd-arduino-tutorial/</a> Any help would be greatly appreciated. This is my first attempt with Johnny five and second attempt at hooking anything up to a bread board. Hope we can get this working. Thanks</p>

<p>Here is my code</p>

<pre><code>const five = require('johnny-five');
const board = new five.Board();


board.on("ready", function() {

    lcd = new five.LCD({
      controller: "PCF8574"
    });

    lcd.print("Hello");
  });
</code></pre>

<p>Here is my configuration</p>

<pre><code>blue         =  pin 7          sclk     (serial clock(CLK)) 10 om
white        =  pin 6          DN(MOSI) (Serial data in) 10om
grey         =  pin 5          D/C      (Mode select) 10om
orange       =  pin 4          RST      (Reset) 10om
yellow/red   =  pin 3          SCE      (Chip select) 10om
yellow-short =  power strip +  LED      (backlight supply) 1kom
green/black  =  gnd / strip - 
blue/power   =  3.4v power + 330om
</code></pre>

<p>Here is are some images of the setup</p>

<p><a href="https://i.stack.imgur.com/besXf.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/besXf.jpg" alt="arduino setup #1"></a></p>

<p><a href="https://i.stack.imgur.com/IBaV2.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/IBaV2.jpg" alt="arduino setup #2"></a></p>

<p><a href="https://i.stack.imgur.com/axfWW.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/axfWW.jpg" alt="arduino setup #3"></a></p>

<p>Update so my configuration looks more like this now</p>

<pre><code>blue         =  pin 7          sclk     (serial clock(CLK)) 10k
white        =  pin 6          DN(MOSI) (Serial data in) 10k
grey         =  pin 5          D/C      (Mode select) 10k
orange       =  pin 4          RST      (Reset) 10k
yellow/red   =  pin 3          SCE      (Chip select) direct
yellow-short =  power strip +  LED      (backlight supply) 330
green/black  =  gnd / strip - 
blue/power   =  3.4v power powerstrip direct
</code></pre>
 40646: <p>Arduino Yun is a ATMega32U4-based board, like other ATMega32U4-based Arduino boards, such as Arduino Leonardo, Micro, the SPI is only available on the ICSP header:</p>

<pre><code>MOSI - Yun has it on ICSP Pin 4
MISO - Yun has it on ICSP Pin 1
SCK - Yun has it on ICSP pin 3
SS - Yun has no dedicated pin, use any digital data pin
</code></pre>

<p>You can find out the ICSP header pin assignment at <a href="https://www.arduino.cc/en/Reference/SPI" rel="nofollow noreferrer">Arduino SPI</a> reference page. So here is the connection between Arduino Yun and LCD5110</p>

<pre><code>Yun               LCD 5110
ICSP pin3         CLK(SCK)
ICSP pin 4        DN(MOSI)
any GPIO pin      D/C (see note 1)
RST               RST
any GPIO pin      SCE(SS) (see note 1)
any GPIO pin      Backlight (via a 330 ohm resistor) (see note 2)
GND               GND
3v3               VCC
</code></pre>

<blockquote>
  <p>Note 1: Although you could use any GPIO for D/C and SCE, you should consult the library that you are using to see what pin the library used for the data/command line and SS line.</p>
  
  <p>Note 2: Connecting to a GPIO pin allows you to turn on and off the LED backlight, you could ignore the connection if you don't want the backlight, or you could connect it directly to 3v3 via a resistor if you want backlight on permanently</p>
</blockquote>

<p>If you still have problem in using the LCD5110, please update your question with complete code and the library that you are using. </p>
