PC Hardware Monitor With Arduino and Nokia 5110 LCD

Arduino based PC monitor which displays CPU temperature, load, clock and used RAM

CPU load or clock values can be also drawn as a graph.

Parts:

• Arduino Nano or Arduino Pro Mini with USB to serial adapter
• Nokia 5110 84x48 LCD

Step 1: Connections

Full list of connections from LCD side:

1. RST to Pin 9
2. CS/CE to Pin 10
3. DC to Pin 8
4. MOSI/DIN to Pin 11 / SPI
5. SCK/CLK to Pin 13 / SPI
6. VCC to 3.3V
7. LIGHT to GND via 200ohm resistor
8. GND

Step 2: Arduino Firmware

Arduino sketch:

https://github.com/cbm80amiga/N5110_HWMonitor

Required libraries:

https://github.com/cbm80amiga/N5110_SPI

https://github.com/cbm80amiga/PropFonts

Step 3: PC Software

1. Download and install HardwareSerialMonitor
   

   https://cdn.hackaday.io/files/19018813666112/Hardw...

2. Start it with administrator rights
3. Choose correct serial port

Comments

[TruongH13]

help me, went i verify code, i meet the error:

In file included from F:\bai hoc\Dien tu\monitor pc arduino nano lcd nokia\N5110_HWMonitor-master\N5110_HWMonitor-master\N5110_HWMonitor\N5110_HWMonitor.ino:33:0:
C:\Program Files (x86)\Arduino\libraries\PropFonts/c64enh_font.h:123:1: warning: narrowing conversion of '-7' from 'int' to 'uint8_t {aka unsigned char}' inside { } [-Wnarrowing]
};
^
In file included from F:\bai hoc\Dien tu\monitor pc arduino nano lcd nokia\N5110_HWMonitor-master\N5110_HWMonitor-master\N5110_HWMonitor\N5110_HWMonitor.ino:34:0:
C:\Program Files (x86)\Arduino\libraries\PropFonts/small5x7bold_font.h:125:1: warning: narrowing conversion of '-5' from 'int' to 'uint8_t {aka unsigned char}' inside { } [-Wnarrowing]
};
^
F:\bai hoc\Dien tu\monitor pc arduino nano lcd nokia\N5110_HWMonitor-master\N5110_HWMonitor-master\N5110_HWMonitor\N5110_HWMonitor.ino: In function 'void setup()':
F:\bai hoc\Dien tu\monitor pc arduino nano lcd nokia\N5110_HWMonitor-master\N5110_HWMonitor-master\N5110_HWMonitor\N5110_HWMonitor.ino:55:49: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
lcd.printStr(ALIGN_CENTER, 2, "Connecting ...");
^
F:\bai hoc\Dien tu\monitor pc arduino nano lcd nokia\N5110_HWMonitor-master\N5110_HWMonitor-master\N5110_HWMonitor\N5110_HWMonitor.ino: In function 'void loop()':
F:\bai hoc\Dien tu\monitor pc arduino nano lcd nokia\N5110_HWMonitor-master\N5110_HWMonitor-master\N5110_HWMonitor\N5110_HWMonitor.ino:177:32: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
lcd.printStr(0, 0, "Temp: ");
^
F:\bai hoc\Dien tu\monitor pc arduino nano lcd nokia\N5110_HWMonitor-master\N5110_HWMonitor-master\N5110_HWMonitor\N5110_HWMonitor.ino:179:30: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
lcd.printStr(x, 0, "'C ");
^
F:\bai hoc\Dien tu\monitor pc arduino nano lcd nokia\N5110_HWMonitor-master\N5110_HWMonitor-master\N5110_HWMonitor\N5110_HWMonitor.ino:180:32: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
lcd.printStr(0, 1, "Load: ");
^
F:\bai hoc\Dien tu\monitor pc arduino nano lcd nokia\N5110_HWMonitor-master\N5110_HWMonitor-master\N5110_HWMonitor\N5110_HWMonitor.ino:183:29: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
lcd.printStr(x, 1, "% ");
^
F:\bai hoc\Dien tu\monitor pc arduino nano lcd nokia\N5110_HWMonitor-master\N5110_HWMonitor-master\N5110_HWMonitor\N5110_HWMonitor.ino:184:31: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
lcd.printStr(0, 3, "RAM: ");
^
F:\bai hoc\Dien tu\monitor pc arduino nano lcd nokia\N5110_HWMonitor-master\N5110_HWMonitor-master\N5110_HWMonitor\N5110_HWMonitor.ino:186:31: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
lcd.printStr(x, 3, " GB ");
^
F:\bai hoc\Dien tu\monitor pc arduino nano lcd nokia\N5110_HWMonitor-master\N5110_HWMonitor-master\N5110_HWMonitor\N5110_HWMonitor.ino:187:33: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
lcd.printStr(0, 2, "Clock: ");
^
F:\bai hoc\Dien tu\monitor pc arduino nano lcd nokia\N5110_HWMonitor-master\N5110_HWMonitor-master\N5110_HWMonitor\N5110_HWMonitor.ino:190:34: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
lcd.printStr(x, 2, " MHz ");
^

[cbm80amiga]

I use older IDE 1.6.5, maybe in newer ones they changed compiler. Try older Arduino IDE or manually add extra casting for variables.