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June 25, 2015 23:34
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esp8266 draw bitmap on oled
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// Example testing sketch for various DHT humidity/temperature sensors | |
// Written by ladyada, public domain | |
#include "ESP8266WiFi.h" | |
#include "DHT.h" | |
// OLED Library | |
#include <Wire.h> | |
#include <Adafruit_GFX.h> | |
#include <ESP_Adafruit_SSD1306.h> | |
#define OLED_RESET 4 | |
Adafruit_SSD1306 display(OLED_RESET); | |
#define DHTPIN 16 // what pin we're connected to | |
// Uncomment whatever type you're using! | |
//#define DHTTYPE DHT11 // DHT 11 | |
#define DHTTYPE DHT22 // DHT 22 (AM2302) | |
//#define DHTTYPE DHT21 // DHT 21 (AM2301) | |
// Connect pin 1 (on the left) of the sensor to +5V | |
// NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1 | |
// to 3.3V instead of 5V! | |
// Connect pin 2 of the sensor to whatever your DHTPIN is | |
// Connect pin 4 (on the right) of the sensor to GROUND | |
// Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor | |
// Initialize DHT sensor for normal 16mhz Arduino | |
DHT dht(DHTPIN, DHTTYPE,15); | |
// NOTE: For working with a faster chip, like an Arduino Due or Teensy, you | |
// might need to increase the threshold for cycle counts considered a 1 or 0. | |
// You can do this by passing a 3rd parameter for this threshold. It's a bit | |
// of fiddling to find the right value, but in general the faster the CPU the | |
// higher the value. The default for a 16mhz AVR is a value of 6. For an | |
// Arduino Due that runs at 84mhz a value of 30 works. | |
// Example to initialize DHT sensor for Arduino Due: | |
//DHT dht(DHTPIN, DHTTYPE, 30); | |
//Byte array of bitmap of 48 x 50 px: | |
byte img [] = { | |
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, | |
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xf, 0xf0, 0x0, 0x0, | |
0x0, 0x0, 0x3f, 0xfc, 0x0, 0x0, 0x0, 0x0, 0xff, 0xff, 0x0, 0x0, 0x0, 0x1, 0xfc, | |
0x3f, 0x80, 0x0, 0x0, 0x3, 0xe0, 0x7, 0xc0, 0x0, 0x0, 0x7, 0x80, 0x1, 0xe0, 0x0, | |
0x0, 0xff, 0x0, 0x0, 0xff, 0x0, 0x3, 0xfe, 0x0, 0x0, 0x7f, 0xc0, 0x7, 0xe2, 0x0, | |
0x0, 0x4f, 0xe0, 0x7, 0x80, 0x0, 0x0, 0x1, 0xe0, 0xf, 0x0, 0x0, 0x0, 0x0, 0xf0, | |
0x1e, 0x0, 0x0, 0x0, 0x0, 0x70, 0xe, 0x0, 0x0, 0x0, 0x0, 0x78, 0xc, 0x0, 0x0, | |
0x0, 0x0, 0x30, 0xc, 0x0, 0x0, 0x0, 0x0, 0x30, 0xc, 0x0, 0x0, 0x0, 0x0, 0x30, | |
0xe, 0x0, 0x0, 0x0, 0x0, 0x70, 0x1e, 0x0, 0x0, 0x0, 0x0, 0x70, 0xf, 0x0, 0x0, | |
0x0, 0x0, 0xf0, 0x7, 0x80, 0x0, 0x0, 0x1, 0xe0, 0x7, 0xe3, 0x80, 0x1, 0xc7, 0xe0, | |
0x3, 0xff, 0xc0, 0x3, 0xff, 0xc0, 0x0, 0xff, 0xf0, 0xf, 0xff, 0x0, 0x0, 0x20, 0xfc, | |
0x3f, 0x4, 0x0, 0x0, 0x0, 0x3f, 0xfc, 0x0, 0x0, 0x0, 0x0, 0xf, 0xf0, 0x0, 0x0, | |
0x0, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0, 0xe, 0x0, | |
0x0, 0x0, 0x0, 0x0, 0xe, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1f, 0x0, 0x0, 0x0, 0x0, | |
0x0, 0x1f, 0x0, 0x0, 0x20, 0x0, 0x0, 0x1f, 0x0, 0x0, 0x20, 0x0, 0x0, 0xe, 0x0, | |
0x0, 0x70, 0x0, 0x0, 0x0, 0x1, 0x80, 0x70, 0x0, 0x0, 0x0, 0x1, 0x80, 0xf8, 0x0, | |
0x0, 0x0, 0x3, 0xc0, 0xf8, 0x0, 0x0, 0x0, 0x3, 0xc0, 0xf8, 0x0, 0x0, 0x0, 0x3, | |
0xc0, 0x70, 0x0, 0x0, 0x0, 0x3, 0xc0, 0x0, 0x0, 0x0, 0x0, 0x3, 0xc0, 0x0, 0x0, | |
0x0, 0x0, 0x1, 0x80, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, | |
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, | |
}; | |
void setup() { | |
Serial.begin(9600); | |
Serial.println("DHTxx test!"); | |
// dht begin | |
dht.begin(); | |
// set display | |
display.begin(SSD1306_SWITCHCAPVCC, 0x78>>1); | |
display.display(); | |
delay(2000); | |
display.clearDisplay(); | |
} | |
void showTemp(float temp,float hud) { | |
display.drawBitmap(0, 5, img, 48, 50, 1); | |
// text display tests | |
display.setTextSize(2); | |
display.setTextColor(WHITE); | |
display.setCursor(52,10); | |
display.print(temp); | |
display.println("C"); | |
display.setCursor(52,30); | |
display.print(hud); | |
display.println("%"); | |
display.display(); | |
display.clearDisplay(); | |
} | |
void loop() { | |
// Wait a few seconds between measurements. | |
delay(1000); | |
// Reading temperature or humidity takes about 250 milliseconds! | |
// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor) | |
float h = dht.readHumidity(); | |
// Read temperature as Celsius | |
float t = dht.readTemperature(); | |
// Check if any reads failed and exit early (to try again). | |
if (isnan(h) || isnan(t)) { | |
Serial.println("Failed to read from DHT sensor!"); | |
return; | |
} | |
// show in serial monitor | |
Serial.print("Humidity: "); | |
Serial.print(h); | |
Serial.print(" %\t"); | |
Serial.print("Temperature: "); | |
Serial.print(t); | |
Serial.print(" *C \n"); | |
// show temp | |
showTemp(t,h); | |
} |
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