CPU Temperature Monitor with OLED Display & Raspberry Pi Pico W

1/*
2 * Project Name: CPU Temperature Monitor
3 * Designed For: Raspberry Pi Pico / Pico W
4 *
5 *
6 * License: GPL3+
7 * This project is licensed under the GNU General Public License v3.0 or later.
8 * You are free to use, modify, and distribute this software under the terms
9 * of the GPL, as long as you preserve the original license and credit the original
10 * author. For more details, see <https://www.gnu.org/licenses/gpl-3.0.en.html>.
11 *
12 * Copyright (C) 2025  Ameya Angadi
13 *
14 * Code Created And Maintained By: Ameya Angadi
15 * Last Modified On: April 06, 2025
16 * Version: 1.0.0
17 *
18 */
19
20
21#include <Wire.h>
22#include <Adafruit_GFX.h>
23#include <Adafruit_SH110X.h>
24
25/* 
26   Configure the I2C address for the OLED screen. Uncomment only one option below. 
27   If the screen does not display correctly, switch to the other address.
28   SH110X-based OLED displays commonly use I2C addresses 0x3C or 0x3D.
29*/
30
31#define OLED_I2C_ADDRESS 0x3C  // Set the I2C address to 0x3C for the OLED screen
32//#define OLED_I2C_ADDRESS 0x3D   // Set the I2C address to 0x3D if 0x3C doesn't work
33
34#define DISPLAY_WIDTH 128  // Width of the OLED screen in pixels
35#define DISPLAY_HEIGHT 64  // Height of the OLED screen in pixels
36#define OLED_RESET -1      // Reset pin is not used (-1 indicates no reset pin)
37
38Adafruit_SH1106G display = Adafruit_SH1106G(DISPLAY_WIDTH, DISPLAY_HEIGHT, &Wire, OLED_RESET);
39float temp = 0;
40
41#define SPLASH_SCREEN_HEIGHT 64
42#define SPLASH_SCREEN_WIDTH 128
43static const unsigned char PROGMEM splash_screen_bmp[] =
44{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
45  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
46  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
47  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
48  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
49  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
50  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
51  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
52  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
53  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
54  0x80, 0x3f, 0xdf, 0xef, 0x1e, 0xfe, 0x7f, 0xbf, 0x81, 0xe1, 0xfe, 0xf7, 0xbf, 0x87, 0xf8, 0x01,
55  0x80, 0x26, 0x4c, 0x27, 0xbc, 0x63, 0x30, 0x98, 0xc1, 0xe1, 0x32, 0x63, 0x18, 0xc3, 0x08, 0x01,
56  0x80, 0x26, 0x4c, 0x26, 0xec, 0x63, 0x30, 0x98, 0xc1, 0x21, 0x32, 0x63, 0x18, 0xc3, 0x08, 0x01,
57  0x80, 0x26, 0x4c, 0x86, 0x4c, 0x63, 0x32, 0x18, 0xc3, 0x31, 0x32, 0x63, 0x18, 0xc3, 0x20, 0x01,
58  0x80, 0x06, 0x0f, 0x86, 0x0c, 0x63, 0x3e, 0x1f, 0x03, 0x30, 0x30, 0x63, 0x1f, 0x03, 0xe0, 0x01,
59  0x80, 0x06, 0x0c, 0x86, 0x0c, 0x7e, 0x32, 0x19, 0x83, 0xf0, 0x30, 0x63, 0x19, 0x83, 0x20, 0x01,
60  0x80, 0x06, 0x0c, 0x26, 0x0c, 0x60, 0x30, 0x98, 0xc6, 0x18, 0x30, 0x63, 0x18, 0xc3, 0x08, 0x01,
61  0x80, 0x06, 0x0c, 0x26, 0x0c, 0x60, 0x30, 0x98, 0xc6, 0x18, 0x30, 0x63, 0x18, 0xc3, 0x08, 0x01,
62  0x80, 0x1f, 0x9f, 0xef, 0xbe, 0xfc, 0x7f, 0xbe, 0x6f, 0x3c, 0xfc, 0x3e, 0x3e, 0x77, 0xf8, 0x01,
63  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
64  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
65  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
66  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
67  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
68  0x80, 0x00, 0x00, 0x78, 0xf1, 0xf0, 0xe7, 0x8f, 0xf3, 0xfc, 0x1f, 0x0f, 0xe0, 0x00, 0x00, 0x01,
69  0x80, 0x00, 0x00, 0x3d, 0xe3, 0x18, 0x63, 0x01, 0x82, 0x64, 0x31, 0x86, 0x30, 0x00, 0x00, 0x01,
70  0x80, 0x00, 0x00, 0x37, 0x66, 0x0c, 0x73, 0x01, 0x82, 0x64, 0x60, 0xc6, 0x30, 0x00, 0x00, 0x01,
71  0x80, 0x00, 0x00, 0x32, 0x66, 0x0c, 0x7b, 0x01, 0x82, 0x64, 0x60, 0xc6, 0x30, 0x00, 0x00, 0x01,
72  0x80, 0x00, 0x00, 0x30, 0x66, 0x0c, 0x6b, 0x01, 0x80, 0x60, 0x60, 0xc7, 0xc0, 0x00, 0x00, 0x01,
73  0x80, 0x00, 0x00, 0x30, 0x66, 0x0c, 0x6f, 0x01, 0x80, 0x60, 0x60, 0xc6, 0x60, 0x00, 0x00, 0x01,
74  0x80, 0x00, 0x00, 0x30, 0x66, 0x0c, 0x67, 0x01, 0x80, 0x60, 0x60, 0xc6, 0x30, 0x00, 0x00, 0x01,
75  0x80, 0x00, 0x00, 0x30, 0x63, 0x18, 0x63, 0x01, 0x80, 0x60, 0x31, 0x86, 0x30, 0x00, 0x00, 0x01,
76  0x80, 0x00, 0x00, 0x7d, 0xf1, 0xf0, 0xf3, 0x0f, 0xf1, 0xf8, 0x1f, 0x0f, 0x9c, 0x00, 0x00, 0x01,
77  0x80, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
78  0x80, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
79  0x80, 0x21, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
80  0x80, 0x21, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
81  0x80, 0x21, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
82  0x80, 0x21, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
83  0x80, 0x21, 0x70, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
84  0x80, 0x21, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
85  0x80, 0x2d, 0x70, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
86  0x80, 0x2d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
87  0x80, 0x2d, 0x7c, 0x70, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
88  0x80, 0x2d, 0x00, 0x50, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
89  0x80, 0x2d, 0x70, 0x70, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
90  0x80, 0x2d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
91  0x80, 0x2d, 0x70, 0x07, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
92  0x80, 0x2d, 0x00, 0x0f, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
93  0x80, 0x2d, 0x00, 0x0c, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
94  0x80, 0x4c, 0x80, 0x0c, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
95  0x80, 0x9e, 0x40, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
96  0x81, 0x3f, 0x20, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
97  0x81, 0x7f, 0xa0, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
98  0x81, 0x7f, 0xa0, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
99  0x81, 0x7f, 0xa0, 0x0c, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
100  0x81, 0x3f, 0x20, 0x0c, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
101  0x80, 0x9e, 0x40, 0x0f, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x13, 0xed, 0x49,
102  0x80, 0x40, 0x80, 0x07, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2a, 0xa9, 0x55,
103  0x80, 0x3f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3a, 0xad, 0xdd,
104  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2a, 0xa8, 0x55,
105  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2a, 0xad, 0xd5,
106  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
107  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
108};
109
110void setup() {
111  delay(250);  // wait for the OLED to power up
112  display.begin(OLED_I2C_ADDRESS, true);
113  display.clearDisplay();
114  display.setTextColor(SH110X_WHITE);
115  display.drawBitmap(0, 0, splash_screen_bmp, 128, 64, 1);  //Displays the Splash Screen
116  display.display();
117  delay(3000);
118}
119
120void loop() {
121  temp = analogReadTemp();
122  display.clearDisplay();
123  display.drawRect(2, 2, 126, 62, SH110X_WHITE);
124  display.setTextSize(2);
125  display.setCursor(15, 15);
126  display.println("CPU Temp:");
127  display.setTextSize(2);
128  display.setCursor(25, 35);
129  display.println(String(temp, 2));
130  display.setCursor(90, 35);
131  display.print("C");
132  display.display();
133  delay(750);   //Small delay between the readings
134}