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‎examples/i2c_SSD1306_DHT22-TemperatureSensor/i2c_SSD1306_DHT22-TemperatureSensor.ino‎

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// Example testing sketch for various DHT humidity/temperature sensors
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// Written by ladyada, public domain
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// REQUIRES the following Arduino libraries:
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// - DHT Sensor Library: https://github.com/adafruit/DHT-sensor-library
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// - Adafruit Unified Sensor Lib: https://github.com/adafruit/Adafruit_Sensor
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//***********************************************************************************************
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// Adafruit's example has been extended for being used with the FluxGarage RoboEyes,
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// showing different robot face expressions and animations in relation to the temperature
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// variable "t". Beside the DHT22 sensor, add an I2C SSD1306 OLED display to get started.
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//
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// Published in August 2025 by Dennis Hoelscher, FluxGarage
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// www.youtube.com/@FluxGarage
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// www.fluxgarage.com
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//
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//***********************************************************************************************
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#include "DHT.h"
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#define DHTPIN 2 // Digital pin connected to the DHT sensor
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// Feather HUZZAH ESP8266 note: use pins 3, 4, 5, 12, 13 or 14 --
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// Pin 15 can work but DHT must be disconnected during program upload.
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// Uncomment whatever type you're using!
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//#define DHTTYPE DHT11 // DHT 11
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#define DHTTYPE DHT22 // DHT 22 (AM2302), AM2321
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//#define DHTTYPE DHT21 // DHT 21 (AM2301)
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// Connect pin 1 (on the left) of the sensor to +5V
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// NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1
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// to 3.3V instead of 5V!
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// Connect pin 2 of the sensor to whatever your DHTPIN is
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// Connect pin 3 (on the right) of the sensor to GROUND (if your sensor has 3 pins)
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// Connect pin 4 (on the right) of the sensor to GROUND and leave the pin 3 EMPTY (if your sensor has 4 pins)
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// Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor
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// Initialize DHT sensor.
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// Note that older versions of this library took an optional third parameter to
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// tweak the timings for faster processors. This parameter is no longer needed
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// as the current DHT reading algorithm adjusts itself to work on faster procs.
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DHT dht(DHTPIN, DHTTYPE);
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#include <Adafruit_SSD1306.h>
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#define SCREEN_WIDTH 128 // OLED display width, in pixels
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#define SCREEN_HEIGHT 64 // OLED display height, in pixels
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// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
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#define OLED_RESET -1 // Reset pin # (or -1 if sharing Arduino reset pin)
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Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
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#include <FluxGarage_RoboEyes.h> // https://github.com/FluxGarage/RoboEyes
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roboEyes roboEyes; // create RoboEyes instance
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// EVENT TIMER
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unsigned long eventTimer; // will save the timestamps
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void setup() {
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Serial.begin(9600);
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// Startup OLED Display
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// SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
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if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3C or 0x3D
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Serial.println(F("SSD1306 allocation failed"));
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for(;;); // Don't proceed, loop forever
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}
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// Startup dht sensor lib
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dht.begin();
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//Serial.println(F("DHTxx test!"));
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// Startup robo eyes
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roboEyes.begin(SCREEN_WIDTH, SCREEN_HEIGHT, 100); // screen-width, screen-height, max framerate
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roboEyes.setPosition(DEFAULT); // eye position should be middle center
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roboEyes.setAutoblinker(ON, 3, 2); // start auto blinker
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display.setRotation(2); // Rotate the display by 180 degrees - this makes sense if your display is mounted upside down
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eventTimer = millis(); // start event timer from here
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}
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void loop() {
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roboEyes.update(); // update eyes drawings
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// dont' use delay() here in order to ensure fluid eyes animations
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// Measure temperature every 5 seconds
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if(millis() >= eventTimer+5000){
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// Reading temperature or humidity takes about 250 milliseconds!
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// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
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float h = dht.readHumidity();
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// Read temperature as Celsius (the default)
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float t = dht.readTemperature();
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// Read temperature as Fahrenheit (isFahrenheit = true)
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float f = dht.readTemperature(true);
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// Check if any reads failed and exit early (to try again).
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if (isnan(h) || isnan(t) || isnan(f)) {
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Serial.println(F("Failed to read from DHT sensor!"));
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return;
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}
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// Compute heat index in Fahrenheit (the default)
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float hif = dht.computeHeatIndex(f, h);
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// Compute heat index in Celsius (isFahreheit = false)
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float hic = dht.computeHeatIndex(t, h, false);
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/*Serial.print(F("Humidity: "));
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Serial.print(h);
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Serial.print(F("% Temperature: "));
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Serial.print(t);
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Serial.print(F("°C "));
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Serial.print(f);
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Serial.print(F("°F Heat index: "));
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Serial.print(hic);
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Serial.print(F("°C "));
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Serial.print(hif);
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Serial.println(F("°F"));
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*/
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Serial.println(t);
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if (t < 15){
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// Robot is freezing if temperature is below 15° Celsius
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roboEyes.setMood(TIRED);
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roboEyes.setHFlicker(ON, 2);
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}
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else if (t > 25){
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// Robot is sweating if temperature is above 25° Celsius
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roboEyes.setMood(TIRED);
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roboEyes.setSweat(ON);
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roboEyes.setPosition(S);
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}
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else {
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// Robot's comfort zone: temperature is between 15° and 25° Celsius
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roboEyes.setMood(DEFAULT); // neutral face expression
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roboEyes.setPosition(DEFAULT); // eye position: middle center
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roboEyes.setHFlicker(OFF);
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roboEyes.setSweat(OFF);
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}
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eventTimer = millis(); // reset timer
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}
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} // end of main loop
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‎examples/spi_SSD1322_Basics/spi_SSD1322_Basics.ino‎

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//***********************************************************************************************
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// This example shows how to use the basic methods of the FluxGarage Robo Eyes library.
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//
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// Hardware: You'll need a breadboard, a micro controller such as ESP32, an SPI oled display
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// with 1322 chip and some jumper wires.
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//
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// Published in may 2025 by Dennis Hoelscher, FluxGarage
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// www.youtube.com/@FluxGarage
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// www.fluxgarage.com
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//
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//***********************************************************************************************
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#include <SSD1322_for_Adafruit_GFX.h> // -> Display driver, download here: https://github.com/venice1200/SSD1322_for_Adafruit_GFX
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// Used for software SPI
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#define OLED_CLK 4
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#define OLED_MOSI 6
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// Used for software or hardware SPI
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#define OLED_CS 7
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#define OLED_DC 9
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// Used for I2C or SPI
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#define OLED_RESET 8
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// hardware SPI
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Adafruit_SSD1322 display(256, 64, &SPI, OLED_DC, OLED_RESET, OLED_CS);
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#include <FluxGarage_RoboEyes.h>
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roboEyes roboEyes; // create RoboEyes instance
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#define SCREEN_WIDTH 256 // OLED display width, in pixels
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#define SCREEN_HEIGHT 64 // OLED display height, in pixels
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void setup() {
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Serial.begin(9600);
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//while (! Serial) delay(100);
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Serial.println("SSD1327 OLED test");
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if ( ! display.begin(0x3D) ) {
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Serial.println("Unable to initialize OLED");
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while (1) yield();
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}
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// Startup robo eyes
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roboEyes.begin(SCREEN_WIDTH, SCREEN_HEIGHT, 100); // screen-width, screen-height, max framerate
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roboEyes.setDisplayColors(0x00, 0x0F); // Most dark/bright values for grayscale oleds, such as the SSD1322
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// Define some automated eyes behaviour
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roboEyes.setAutoblinker(ON, 3, 2); // Start auto blinker animation cycle -> bool active, int interval, int variation -> turn on/off, set interval between each blink in full seconds, set range for random interval variation in full seconds
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roboEyes.setIdleMode(ON, 2, 2); // Start idle animation cycle (eyes looking in random directions) -> turn on/off, set interval between each eye repositioning in full seconds, set range for random time interval variation in full seconds
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// Define eye shapes, all values in pixels
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//roboEyes.setWidth(36, 36); // byte leftEye, byte rightEye
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//roboEyes.setHeight(36, 36); // byte leftEye, byte rightEye
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//roboEyes.setBorderradius(8, 8); // byte leftEye, byte rightEye
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//roboEyes.setSpacebetween(10); // int space -> can also be negative
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// Cyclops mode
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//roboEyes.setCyclops(ON); // bool on/off -> if turned on, robot has only on eye
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// Define mood, curiosity and position
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//roboEyes.setMood(DEFAULT); // mood expressions, can be TIRED, ANGRY, HAPPY, DEFAULT
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//roboEyes.setPosition(DEFAULT); // cardinal directions, can be N, NE, E, SE, S, SW, W, NW, DEFAULT (default = horizontally and vertically centered)
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//roboEyes.setCuriosity(ON); // bool on/off -> when turned on, height of the outer eyes increases when moving to the very left or very right
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// Set horizontal or vertical flickering
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//roboEyes.setHFlicker(ON, 2); // bool on/off, byte amplitude -> horizontal flicker: alternately displacing the eyes in the defined amplitude in pixels
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//roboEyes.setVFlicker(ON, 2); // bool on/off, byte amplitude -> vertical flicker: alternately displacing the eyes in the defined amplitude in pixels
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// Play prebuilt oneshot animations
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//roboEyes.anim_confused(); // confused - eyes shaking left and right
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//roboEyes.anim_laugh(); // laughing - eyes shaking up and down
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} // end of setup
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void loop() {
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roboEyes.update(); // update eyes drawings
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// Dont' use delay() here in order to ensure fluid eyes animations.
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// Check the AnimationSequences example for common practices.
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}
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