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lcd thermocouple with 128x64 Yellow Blue SSD1306 OLED
// based on the lcdthermocouple example
// also:
// https://randomnerdtutorials.com/esp32-ssd1306-oled-display-arduino-ide/
// http://www.esp32learning.com/code/esp32-and-max6675-example.php
// parts:
// * HiLetgo DC 3-5V MAX6675 Module + K Type Thermocouple Temperature Sensor
// * UCTRONICS 0.96 Inch OLED Module 12864 128x64 Yellow Blue SSD1306 Driver I2C
// * ESP32
#include <max6675.h>
#include <Wire.h>
// also requires Adafruit Bus IO Library
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
int thermoDO = 19; // SO
int thermoCS = 23;
int thermoCLK = 5; // SCK
MAX6675 thermocouple(thermoCLK, thermoCS, thermoDO);
// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
void setup() {
Serial.begin(9600);
if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64
Serial.println(F("SSD1306 allocation failed"));
for(;;);
}
delay(2000);
}
void loop() {
display.clearDisplay();
display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(0, 1);
display.println("Paul's Thermometer");
display.setTextSize(5);
display.setTextColor(WHITE);
display.setCursor(0, 20);
display.print((int) thermocouple.readFahrenheit());
display.println("F");
display.display();
delay(200);
}
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