Create AHT10_ATtinny85_LCD_i2c.ino

2024-10-03 18:09:02 -04:00 · 2020-01-21 12:39:48 -05:00 · 2020-01-21 12:39:48 -05:00 · b9fedafac2
commit b9fedafac2
parent 380bc2036b
1 changed files with 128 additions and 0 deletions
--- a/examples/AHT10_ATtinny85_LCD_i2c/AHT10_ATtinny85_LCD_i2c.ino
+++ b/examples/AHT10_ATtinny85_LCD_i2c/AHT10_ATtinny85_LCD_i2c.ino
@ -0,0 +1,128 @@
+/***************************************************************************************************/
+/* 
+   This is an Arduino library for Aosong ASAIR AHT10, AHT15 Digital Humidity & Temperature Sensor
+
+   written by : enjoyneering79
+   sourse code: https://github.com/enjoyneering/
+
+   This chip uses I2C bus to communicate, specials pins are required to interface
+   Board:                                    SDA                    SCL                    Level
+   Uno, Mini, Pro, ATmega168, ATmega328..... A4                     A5                     5v
+   Mega2560................................. 20                     21                     5v
+   Due, SAM3X8E............................. 20                     21                     3.3v
+   Leonardo, Micro, ATmega32U4.............. 2                      3                      5v
+   Digistump, Trinket, ATtiny85............. 0/physical pin no.5    2/physical pin no.7    5v
+   Blue Pill, STM32F103xxxx boards.......... PB7                    PB6                    3.3v/5v
+   ESP8266 ESP-01........................... GPIO0/D5               GPIO2/D3               3.3v/5v
+   NodeMCU 1.0, WeMos D1 Mini............... GPIO4/D2               GPIO5/D1               3.3v/5v
+   ESP32.................................... GPIO21/D21             GPIO22/D22             3.3v
+
+   Frameworks & Libraries:
+   ATtiny  Core          - https://github.com/SpenceKonde/ATTinyCore
+   ESP32   Core          - https://github.com/espressif/arduino-esp32
+   ESP8266 Core          - https://github.com/esp8266/Arduino
+   STM32   Core          - https://github.com/stm32duino/Arduino_Core_STM32
+                         - https://github.com/rogerclarkmelbourne/Arduino_STM32
+
+
+   GNU GPL license, all text above must be included in any redistribution,
+   see link for details  - https://www.gnu.org/licenses/licenses.html
+*/
+/***************************************************************************************************/
+#include <Wire.h>
+#include <AHT10.h>
+#include <LiquidCrystal_I2C.h> //https://github.com/enjoyneering/LiquidCrystal_I2C
+
+#define LCD_ROWS      4        //qnt. of lcd rows
+#define LCD_COLUMNS   20       //qnt. of lcd columns
+#define DEGREE_SYMBOL 0xDF     //degree symbol from LCD ROM
+#define LED           1        //connect led to ATtiny85 pin physical pin no.6 in series with 470 Ohm resistor
+
+float valueTH = 0;
+
+const uint8_t temperature_icon[8] PROGMEM = {0x04, 0x0A, 0x0A, 0x0E, 0x0E, 0x1F, 0x1F, 0x0E}; //PROGMEM saves variable to flash & keeps dynamic memory free
+const uint8_t humidity_icon[8]    PROGMEM = {0x04, 0x0E, 0x0E, 0x1F, 0x1F, 0x1F, 0x0E, 0x00};
+const uint8_t plus_minus_icon[8]  PROGMEM = {0x00, 0x04, 0x0E, 0x04, 0x00, 0x0E, 0x00, 0x00};
+
+
+AHT10             myAHT10();
+LiquidCrystal_I2C lcd(PCF8574_ADDR_A21_A11_A01, 4, 5, 6, 16, 11, 12, 13, 14, POSITIVE);
+
+
+void setup()
+{
+  pinMode(LED, OUTPUT);
+
+  /* LCD connection check */ 
+  while (lcd.begin(LCD_COLUMNS, LCD_ROWS) != true) //20 colums, 4 rows
+  {
+    digitalWrite(LED, HIGH);
+    delay(500);
+    digitalWrite(LED, LOW);
+    delay(500);
+  }
+
+  /* AHT10 connection check */
+  while (myAHT10.begin() != true)
+  {
+    lcd.print(F("AHT10 error"));                   //(F()) saves string to flash & keeps dynamic memory free
+    delay(5000);
+  }
+
+  lcd.clear();
+
+//Wire.setClock(400000);                           //experimental I2C speed! 400KHz, default 100KHz
+
+  lcd.print(F("AHT10 OK"));
+  delay(2000);
+
+  lcd.clear();
+
+  /* load custom symbol to CGRAM */
+  lcd.createChar(0, temperature_icon);
+  lcd.createChar(1, humidity_icon);
+  lcd.createChar(2, plus_minus_icon);
+
+  /* prints static text */
+  lcd.setCursor(0, 0);
+  lcd.write(0);                                    //print custom tempereture symbol from CGRAM
+
+  lcd.setCursor(0, 1);                             //set 1-st colum & 2-nd row, first colum & row started at zero
+  lcd.write(1);                                    //print custom humidity symbol from CGRAM
+}
+
+
+void loop()
+{
+  /* prints dynamic temperature data */
+  lcd.setCursor(1, 0);
+  valueTH = myAHT10.readTemperature();             //read 6 bytes over I2C
+  if (valueTH != AHT10_ERROR)
+  {
+    lcd.print(myAHT10.readTemperature());
+    lcd.write(2);                                  //print custom plus/minus symbol
+    lcd.print(F("0.3"));
+    lcd.write(DEGREE_SYMBOL);                      //print degree symbol from the LCD ROM
+    lcd.print(F("C  "));
+  }
+  else
+  {
+    lcd.print(F("i2c error  "));
+  } 
+
+  /* prints dynamic humidity data */
+  lcd.setCursor(1, 1);
+  valueTH = myAHT10.readHumidity();                //read 6 bytes over I2C
+  if (valueTH != AHT10_ERROR)
+  {
+    lcd.print(valueTH);
+    lcd.write(2);
+    lcd.print(F("2%  "));
+  }
+  else
+  {
+    lcd.print(F("i2c error  "));
+  }
+
+  delay(10000);                                    //recomended polling frequency 8sec..30sec
+}