mirror of
https://github.com/enjoyneering/AHT10.git
synced 2024-10-03 18:09:02 -04:00
129 lines
4.8 KiB
C++
129 lines
4.8 KiB
C++
/***************************************************************************************************/
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/*
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This is an Arduino library for Aosong ASAIR AHT10, AHT15 Digital Humidity & Temperature Sensor
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written by : enjoyneering79
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sourse code: https://github.com/enjoyneering/
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This chip uses I2C bus to communicate, specials pins are required to interface
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Board: SDA SCL Level
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Uno, Mini, Pro, ATmega168, ATmega328..... A4 A5 5v
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Mega2560................................. 20 21 5v
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Due, SAM3X8E............................. 20 21 3.3v
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Leonardo, Micro, ATmega32U4.............. 2 3 5v
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Digistump, Trinket, ATtiny85............. 0/physical pin no.5 2/physical pin no.7 5v
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Blue Pill, STM32F103xxxx boards.......... PB7 PB6 3.3v/5v
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ESP8266 ESP-01........................... GPIO0/D5 GPIO2/D3 3.3v/5v
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NodeMCU 1.0, WeMos D1 Mini............... GPIO4/D2 GPIO5/D1 3.3v/5v
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ESP32.................................... GPIO21/D21 GPIO22/D22 3.3v
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Frameworks & Libraries:
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ATtiny Core - https://github.com/SpenceKonde/ATTinyCore
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ESP32 Core - https://github.com/espressif/arduino-esp32
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ESP8266 Core - https://github.com/esp8266/Arduino
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STM32 Core - https://github.com/stm32duino/Arduino_Core_STM32
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- https://github.com/rogerclarkmelbourne/Arduino_STM32
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GNU GPL license, all text above must be included in any redistribution,
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see link for details - https://www.gnu.org/licenses/licenses.html
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*/
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/***************************************************************************************************/
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#include <Wire.h>
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#include <AHT10.h>
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#include <LiquidCrystal_I2C.h> //https://github.com/enjoyneering/LiquidCrystal_I2C
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#define LCD_ROWS 4 //qnt. of lcd rows
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#define LCD_COLUMNS 20 //qnt. of lcd columns
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#define DEGREE_SYMBOL 0xDF //degree symbol from LCD ROM
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#define LED 1 //connect led to ATtiny85 pin physical pin no.6 in series with 470 Ohm resistor
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float valueTH = 0;
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const uint8_t temperature_icon[8] PROGMEM = {0x04, 0x0A, 0x0A, 0x0E, 0x0E, 0x1F, 0x1F, 0x0E}; //PROGMEM saves variable to flash & keeps dynamic memory free
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const uint8_t humidity_icon[8] PROGMEM = {0x04, 0x0E, 0x0E, 0x1F, 0x1F, 0x1F, 0x0E, 0x00};
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const uint8_t plus_minus_icon[8] PROGMEM = {0x00, 0x04, 0x0E, 0x04, 0x00, 0x0E, 0x00, 0x00};
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AHT10 myAHT10(AHT10_ADDRESS_0X38);
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LiquidCrystal_I2C lcd(PCF8574_ADDR_A21_A11_A01, 4, 5, 6, 16, 11, 12, 13, 14, POSITIVE);
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void setup()
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{
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pinMode(LED, OUTPUT);
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/* LCD connection check */
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while (lcd.begin(LCD_COLUMNS, LCD_ROWS) != true) //20 colums, 4 rows
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{
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digitalWrite(LED, HIGH);
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delay(500);
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digitalWrite(LED, LOW);
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delay(500);
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}
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/* AHT10 connection check */
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while (myAHT10.begin() != true)
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{
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lcd.print(F("AHT10 error")); //(F()) saves string to flash & keeps dynamic memory free
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delay(5000);
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}
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lcd.clear();
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//Wire.setClock(400000); //experimental I2C speed! 400KHz, default 100KHz
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lcd.print(F("AHT10 OK"));
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delay(2000);
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lcd.clear();
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/* load custom symbol to CGRAM */
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lcd.createChar(0, temperature_icon);
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lcd.createChar(1, humidity_icon);
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lcd.createChar(2, plus_minus_icon);
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/* prints static text */
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lcd.setCursor(0, 0);
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lcd.write(0); //print custom tempereture symbol from CGRAM
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lcd.setCursor(0, 1); //set 1-st colum & 2-nd row, first colum & row started at zero
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lcd.write(1); //print custom humidity symbol from CGRAM
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}
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void loop()
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{
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/* prints dynamic temperature data */
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lcd.setCursor(1, 0);
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valueTH = myAHT10.readTemperature(); //read 6 bytes over I2C
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if (valueTH != AHT10_ERROR)
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{
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lcd.print(myAHT10.readTemperature());
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lcd.write(2); //print custom plus/minus symbol
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lcd.print(F("0.3"));
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lcd.write(DEGREE_SYMBOL); //print degree symbol from the LCD ROM
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lcd.print(F("C "));
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}
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else
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{
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lcd.print(F("i2c error "));
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}
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/* prints dynamic humidity data */
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lcd.setCursor(1, 1);
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valueTH = myAHT10.readHumidity(); //read 6 bytes over I2C
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if (valueTH != AHT10_ERROR)
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{
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lcd.print(valueTH);
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lcd.write(2);
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lcd.print(F("2% "));
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}
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else
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{
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lcd.print(F("i2c error "));
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}
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delay(10000); //recomended polling frequency 8sec..30sec
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}
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