Hello all,
I am preparing a project. There are going to be 2 OLED's, 1 DHT sensor, 1 Clock module. OLED A will show time and temperature in every 5 seconds (5 seconds time then 5 seconds temperature), OLED B will show maybe hundreds of bitmap arrays if it is a weekday. 1 Multiplexer is connecting 2 OLED's to Arduino Mega.
I have plugged everything, coded the basics but my problem is kinda strange. When i upload the code OLED B works perfectly (usually) but when i plug the USB cable out and reconnect it, or when i press the reset button it's not working anymore. This is going to be a gift so i have to finish it perfectly. I am pasting all my code here, you will see tons of PROGMEM arrays, you can skip them. You will see that i didn't put tcaselect(0) cause i couldn't be sure but it is working like that when i plug the USB and upload the code. Problem is at Display1. I am attaching ino and sketch image.
Can you please help me, thanks in advance!
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <SimpleDHT.h>
#define MUX_Address 0x70 // TCA9548A Encoders address
#define DS3231_I2C_ADDRESS 0x68 // DS3231 address
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
#define OLED_RESET 4 // Reset pin # (or -1 if sharing Arduino reset pin)
int count = 0;
const int cntTotalTextBitmap = 35;
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
int pinDHT11 = 13;
SimpleDHT11 dht11(pinDHT11);
byte decToBcd(byte val)
{
return ((val / 10 * 16) + (val % 10));
}
byte bcdToDec(byte val)
{
return ((val / 16 * 10) + (val % 16));
}
void tcaselect(uint8_t i2c_bus)
{
if (i2c_bus > 7) return;
Wire.beginTransmission(MUX_Address);
Wire.write(1 << i2c_bus);
Wire.endTransmission();
}
//void setDS3231time(byte second, byte minute, byte hour, byte dayOfWeek, byte dayOfMonth, byte month, byte year)
//{
// tcaselect(2);
// // sets time and date data to DS3231
// Wire.beginTransmission(DS3231_I2C_ADDRESS);
// Wire.write(0); // set next input to start at the seconds register
// Wire.write(decToBcd(second)); // set seconds
// Wire.write(decToBcd(minute)); // set minutes
// Wire.write(decToBcd(hour)); // set hours
// Wire.write(decToBcd(dayOfWeek)); // set day of week (1=Sunday, 7=Saturday)
// Wire.write(decToBcd(dayOfMonth)); // set date (1 to 31)
// Wire.write(decToBcd(month)); // set month
// Wire.write(decToBcd(year)); // set year (0 to 99)
// Wire.endTransmission();
//}
void readDS3231time(byte *second, byte *minute, byte *hour, byte *dayOfWeek, byte *dayOfMonth, byte *month, byte *year)
{
tcaselect(2);
Wire.beginTransmission(DS3231_I2C_ADDRESS);
Wire.write(0); // set DS3231 register pointer to 00h
Wire.endTransmission();
// request seven bytes of data from DS3231 starting from register 00h
Wire.requestFrom(DS3231_I2C_ADDRESS, 7);
*second = bcdToDec(Wire.read() & 0x7f);
*minute = bcdToDec(Wire.read());
*hour = bcdToDec(Wire.read() & 0x3f);
*dayOfWeek = bcdToDec(Wire.read());
*dayOfMonth = bcdToDec(Wire.read());
*month = bcdToDec(Wire.read());
*year = bcdToDec(Wire.read());
}
// TONS OF const unsigned char image[] PROGMEM = {.....} HERE
void printTemperature()
{
byte temperature = 0;
byte humidity = 0;
int err = SimpleDHTErrSuccess;
if ((err = dht11.read(&temperature, &humidity, NULL)) != SimpleDHTErrSuccess)
{
display.print("DHT11 sensörü okumasında hata oluştu, Hata=");
display.print(err);
return;
}
tcaselect(1);
display.clearDisplay();
display.setTextSize(3); // Normal 1:1 pixel scale
display.setTextColor(WHITE); // Draw white text
display.cp437(true); // Use full 256 char 'Code Page 437' font
display.drawBitmap(0, 25, thermo, 32, 32, 1);
display.setCursor(45, 30);
display.print((int)temperature); display.print(" C ");
display.setTextSize(2);
display.setCursor(80, 26);
display.print("o");
display.display();
delay(500);
}
void printClock(byte second, byte minute, byte hour, byte dayOfWeek, byte dayOfMonth, byte month, byte year)
{
tcaselect(1);
display.clearDisplay();
display.setTextSize(2.5);
display.setTextColor(WHITE);
display.cp437(true);
display.setCursor(0, 40);
if (hour < 10)
{
display.print("0");
}
display.print(hour);
display.print(':');
if (minute < 10)
{
display.print("0");
}
display.print(minute);
display.print(':');
if (second < 10)
{
display.print("0");
}
display.print(second);
display.setCursor(32, 2);
display.setTextSize(2);
if (dayOfMonth < 10)
{
display.print("0");
}
display.print(dayOfMonth);
display.print('/');
if (month < 10)
{
display.print("0");
}
display.print(month);
display.print('/');
//display.print("20");
display.print(year);
display.drawBitmap(0, 0, calendar, 32, 32, 1);
display.drawBitmap(96, 30, clock, 32, 32, 1);
display.display();
}
void ClockInit()
{
tcaselect(2); // Loop through each connected displays on the I2C buses
Wire.beginTransmission(DS3231_I2C_ADDRESS);
Wire.write(0); // set DS3231 register pointer to 00h
Wire.endTransmission();
}
void DisplayInit()
{
for (int i = 0; i < 2; i++)
{
tcaselect(i); // Loop through each connected displays on the I2C buses
display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
display.display();
}
}
struct text_bitmap
{
const uint8_t* picture;
char text0[10];
char text1[10];
char text2[10];
char text3[10];
char text4[10];
char text5[10];
};
struct text_bitmap text_bitmap_list[cntTotalTextBitmap] =
{
{ acorn_fill, "", "", "", "", "", "" },
{ bangs, "", "", "", "", "", "" },
{ beard, "", "", "", "", "", "" },
{ beer_stroke, "", "", "", "", "", "" },
{ beers_fill, "", "", "", "", "", "" },
{ cake_fill, "", "", "", "", "", "" },
{ camp, "", "", "", "", "", "" },
{ cat_stroke, "", "", "", "", "", "" },
{ cats_fill, "", "", "", "", "", "" },
{ chicken, "", "", "", "", "", "" },
{ coffee, "", "", "", "", "", "" },
{ comment_stroke, "", "", "", "", "", "" },
{ diving, "", "", "", "", "", "" },
{ dress_fill, "", "", "", "", "", "" },
{ eggs, "", "", "", "", "", "" },
{ go_away, "", "", "", "", "", "" },
{ hands, "", "", "", "", "", "" },
{ hug, "", "", "", "", "", "" },
{ icecream_fill, "Burcucum", "en cok", "limonlu", "dondurma", "sever. Ve", "kapta yer" },
{ instagram_fill, "", "", "", "", "", "" },
{ kitten_fill, "", "", "", "", "", "" },
{ mussel, "", "", "", "", "", "" },
{ necklace, "", "", "", "", "", "" },
{ noodle, "", "", "", "", "", "" },
{ pepper_fill, "", "", "", "", "", "" },
{ pit, "", "", "", "", "", "" },
{ sakura, "", "", "", "", "", "" },
{ salmon, "", "", "", "", "", "" },
{ sickness, "", "", "", "", "", "" },
{ summer, "", "", "", "", "", "" },
{ sushi, "", "", "", "", "", "" },
{ twins, "", "", "", "", "", "" },
{ twitter_fill, "", "", "", "", "", "" },
{ very_funny, "", "", "", "", "", "" }
{ waffle_fill, "", "", "", "", "", "" }
};
void print_text_bitmap(struct text_bitmap arr[], int i)
{
//tcaselect(0);
display.clearDisplay();
display.setTextSize(1); // Normal 1:1 pixel scale
display.setTextColor(WHITE); // Draw white text
display.cp437(true); // Use full 256 char 'Code Page 437' font
display.setCursor(66, 0);
display.print(arr[i].text0);
display.setCursor(66, 10);
display.print(arr[i].text1);
display.setCursor(66, 20);
display.print(arr[i].text2);
display.setCursor(66, 30);
display.print(arr[i].text3);
display.setCursor(66, 40);
display.print(arr[i].text4);
display.setCursor(66, 50);
display.print(arr[i].text5);
display.drawBitmap(0, 0, arr[i].picture, 64, 64, 1);
display.display();
}
void setup()
{
Serial.begin(9600);
DisplayInit(); // Initialize the displays
ClockInit(); // Initialize the clock
}
void loop()
{
//Display1
byte second, minute, hour, dayOfWeek, dayOfMonth, month, year;
readDS3231time(&second, &minute, &hour, &dayOfWeek, &dayOfMonth, &month, &year);
if ((dayOfWeek == 2 || dayOfWeek == 3 || dayOfWeek == 4 || dayOfWeek == 5 || dayOfWeek == 6) && (second == 0))
{
if (count < cntTotalTextBitmap)
{
print_text_bitmap(text_bitmap_list, count);
delay(2000);
if (count != cntTotalTextBitmap - 1)
{
count = count + 1;
}
else
{
count = 0;
}
}
}
//Display2
if ((second / 5) % 2 == 0)
{
printClock(second, minute, hour, dayOfWeek, dayOfMonth, month, year);
}
else
{
printTemperature();
}
}
Saatli_OLEDli_kutu.ino (124 KB)
Way easier approach.