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olikraus / u8g2

U8glib library for monochrome displays, version 2
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u8g2 and screen oled i2c 128x64 (screen empty) and 128x128 soon #644

Closed Freepl closed 6 years ago

Freepl commented 6 years ago

Hello

I have this screen https://fr.aliexpress.com/item/Free-shipping-Yellow-blue-double-color-128X64-OLED-LCD-LED-Display-Module-For-Arduino-0-96/32665937977.html?spm=a2g0s.9042311.0.0.X7TUdD I connect my screen like this VCC / 5v GND / GND SCL / A5 SDA / A4

I'll receveid this screen too soon https://fr.aliexpress.com/item/Free-shipping-Yellow-blue-double-color-128X64-OLED-LCD-LED-Display-Module-For-Arduino-0-96/32665937977.html?spm=a2g0s.9042311.0.0.X7TUdD

I have this code. It compile but there is nothing on screen. can you see this and say modify this for the 2 screens ?

It has been one week since I look Thank you

My code don't work ( screen empty) `// Pour l'écran

include

include

//Pour les sondes

include //DS18B20 pour température de l'eau et de l'air

include

//les librairies de l'écran // pour les fontes https://github.com/olikraus/u8g2/wiki/fntlistall // poue l'écran https://github.com/olikraus/u8g2/wiki/u8g2setupc

// Déclaratipon de l'écran 128x64 //U8G2_SSD1306_128X64_NONAME_2_SW_I2C u8g2(rotation, clock, data [, reset]) // U8G2_R0,SCL A5, SDA A4 U8G2_SSD1306_128X64_NONAME_2_SW_I2C u8g2 (U8G2_R0, A5, A4)

//Déclaration de l'écran 128x128 / U8G2_SSD1327_EA_W128128_1_SW_I2C u8g2(U8G2_R0, A5, A4); ou le U8G2_SSD1327_MIDAS_128X128_1_SW_I2C u8g2(U8G2_R0, A5, A4); /

// les 2 sondes DS18B20

define ONE_WIRE_BUS_1 2 // sonde pour l'eau pin 2

define ONE_WIRE_BUS_2 4 // sonde pour l'air pin 4

OneWire oneWire_in(ONE_WIRE_BUS_1); // sonde pour l'eau OneWire oneWire_out(ONE_WIRE_BUS_2); // sonde pour l'air DallasTemperature sensor_eau(&oneWire_in); // sonde pour l'eau DallasTemperature sensor_air(&oneWire_out); // sonde pour l'air

void setup(void) { / U8g2 Project: SSD1306 Test Board / pinMode(A4, OUTPUT); digitalWrite(A4, 0); u8g2.begin(); u8g2.setPowerSave(0);

// start serial port Serial.begin(9600); Serial.println("Dallas Temperature Control Library Demo - TwoPin_DS18B20");

// Start up the library sensor_eau.begin(); // sonde pour l'eau sensor_air.begin(); // sonde pour l'air

// déclaration de la pin 2 et 4 pinMode(2, INPUT); pinMode(4, INPUT);

int readValEau = analogRead(2);// met à zéro la sonde EAU int readValAir = analogRead(4);// met à zéro la sonde AIR

}

void loop(void) { // AFFICHAGE SUR SERIAL Serial.print("Recherche des temperatures..."); sensor_eau.requestTemperatures(); sensor_air.requestTemperatures(); Serial.println(" done");

// sonde EAU Serial.print("Température eau: "); Serial.println(sensor_eau.getTempCByIndex(0));

// sonde AIR Serial.print("Température air: "); Serial.println(sensor_air.getTempCByIndex(0)); delay ( 5000);

//modele d'écriture u8g2.setFont(u8g2_font_ncenB14_tr); u8g2.setCursor(0, 15); u8g2.print("Hello World!"); /

// Affichage Niveau batterie u8g2.setFont(u8g2_font_ncenB14_tr); u8g2.setCursor(0, 0); u8g2.println("NIVEAU BATTERIE"); //delay ( 1000);

// pour le voltage de la batterie // Conversion du signal (which goes from 0 - 1023) to a voltage (0 - (V): int sensorValue = analogRead(A0);//*** A3 pour la voiture bateau // écrit la valeur lue float voltage = sensorValue * (5.0 / 1023.0); u8g2.setCursor(0, 1);// position 0, sur la 1 ere ligne, u8g2.print(" "); u8g2.print(voltage); u8g2.print("V");

//Affichage températures Air u8g2.setFont(u8g2_font_chroma48medium8_r); u8g2.setCursor(0, 3); u8g2.println("TEMP. AIR "); u8g2.print(" "); u8g2.print(sensor_air.getTempCByIndex(0)); u8g2.print(" "); u8g2.print("C");

// Affichage températures Eau u8g2.setFont(u8g2_font_ncenB14_tr); u8g2.setCursor(0, 6); u8g2.println("TEMP. EAU "); u8g2.print(" "); u8g2.print(sensor_eau.getTempCByIndex(0)); u8g2.print(" "); u8g2.print("C");

}`

olikraus commented 6 years ago

All the u8g2 commands have to be encapsulated in a while loop:

void loop(void) {
  ...
  u8g2.firstPage();
  do {
    <your code>
  } while ( u8g2.nextPage() );
 ...
}
Freepl commented 6 years ago

Hello I am tall beginning with arduino 1 What declaration of screen I have to take 128x64 and 128x128 ? 2 I change my code but i have error

Code error `Arduino : 1.8.4 (Windows 7), Carte : "Arduino/Genuino Uno" Ecran_u8G2_128x64_128x128:27: error: expected ',' or ';' before 'OneWire' OneWire oneWire_in(ONE_WIRE_BUS_1); // sonde pour l'eau ^ Ecran_u8G2_128x64_128x128:29: error: 'oneWire_in' was not declared in this scope DallasTemperature sensor_eau(&oneWire_in); // sonde pour l'eau ^ exit status 1 expected ',' or ';' before 'OneWire'

`

Here my code modify `// Pour l'écran

include

include

//Pour les sondes

include //DS18B20 pour température de l'eau et de l'air

include

//les librairies de l'écran // pour les fontes https://github.com/olikraus/u8g2/wiki/fntlistall // poue l'écran https://github.com/olikraus/u8g2/wiki/u8g2setupc

// Déclaratipon de l'écran 128x64 U8G2_SSD1306_128X64_NONAME_2_SW_I2C u8g2 (U8G2_R0, A5, A4)

//Déclaration de l'écran 128x128 / U8G2_SSD1327_EA_W128128_1_SW_I2C u8g2(U8G2_R0, A5, A4); ou le U8G2_SSD1327_MIDAS_128X128_1_SW_I2C u8g2(U8G2_R0, A5, A4); /

// les 2 sondes DS18B20

define ONE_WIRE_BUS_1 2 // sonde pour l'eau pin 2

define ONE_WIRE_BUS_2 4 // sonde pour l'air pin 4

OneWire oneWire_in(ONE_WIRE_BUS_1); // sonde pour l'eau OneWire oneWire_out(ONE_WIRE_BUS_2); // sonde pour l'air DallasTemperature sensor_eau(&oneWire_in); // sonde pour l'eau DallasTemperature sensor_air(&oneWire_out); // sonde pour l'air

void setup(void) { / U8g2 Project: SSD1306 Test Board / pinMode(A4, OUTPUT); digitalWrite(A4, 0); u8g2.begin(); u8g2.setPowerSave(0);

// start serial port Serial.begin(9600); Serial.println("Dallas Temperature Control Library Demo - TwoPin_DS18B20");

// Start up the library sensor_eau.begin(); // sonde pour l'eau sensor_air.begin(); // sonde pour l'air

// déclaration de la pin 2 et 4 pinMode(2, INPUT); pinMode(4, INPUT);

int readValEau = analogRead(2);// met à zéro la sonde EAU int readValAir = analogRead(4);// met à zéro la sonde AIR

}

void loop(void) { // AFFICHAGE SUR SERIAL Serial.print("Recherche des temperatures..."); sensor_eau.requestTemperatures(); sensor_air.requestTemperatures(); Serial.println(" done");

// sonde EAU Serial.print("Température eau: "); Serial.println(sensor_eau.getTempCByIndex(0));

// sonde AIR Serial.print("Température air: "); Serial.println(sensor_air.getTempCByIndex(0)); delay ( 5000);

//modele d'écriture u8g2.setFont(u8g2_font_ncenB14_tr); u8g2.setCursor(0, 15); u8g2.print("Hello World!"); / u8g2.firstPage(); do { // Affichage Niveau batterie u8g2.setFont(u8g2_font_ncenB14_tr); u8g2.setCursor(0, 0); u8g2.println("NIVEAU BATTERIE"); //delay ( 1000);

// pour le voltage de la batterie // Conversion du signal (which goes from 0 - 1023) to a voltage (0 - (V): int sensorValue = analogRead(A0);//*** A3 pour la voiture bateau // écrit la valeur lue float voltage = sensorValue * (5.0 / 1023.0); u8g2.setCursor(0, 1);// position 0, sur la 1 ere ligne, u8g2.print(" "); u8g2.print(voltage); u8g2.print("V");

//Affichage températures Air u8g2.setFont(u8g2_font_ncenB14_tr); u8g2.setCursor(0, 3); u8g2.println("TEMP. AIR "); u8g2.print(" "); u8g2.print(sensor_air.getTempCByIndex(0)); u8g2.print(" "); u8g2.print("C");

// Affichage températures Eau u8g2.setFont(u8g2_font_ncenB14_tr); u8g2.setCursor(0, 6); u8g2.println("TEMP. EAU "); u8g2.print(" "); u8g2.print(sensor_eau.getTempCByIndex(0)); u8g2.print(" "); u8g2.print("C"); } while ( u8g2.nextPage() );

}`

Freepl commented 6 years ago

I made a false manipulation

I am going to be frank, I am a big absolute beginner with arduino. The code which I test is a continuation (suite) to copy / to stick.

You could modify it cleanly because I do not understand the arduino language and for the choice of screens and for the coding a lot as such

EDIT : My error is modified // Déclaratipon de l'écran 128x64 U8G2_SSD1306_128X64_NONAME_2_SW_I2C u8g2 (U8G2_R0, A5, A4);

olikraus commented 6 years ago

Actually it looks better. Optimization: Move statements like int sensorValue = analogRead(A0); before the loop.

Is it working now? It not, then please test your hardware setup with one of the u8g2 examples, which are shipped with the u8g2 library.

Freepl commented 6 years ago

I try this this night SCL / A5 SDA / A4

The code is like this ? `void setup(void) { ..... }

int sensorValue = analogRead(A0); // A4 or A5 for me ? void loop(void) { u8g2.firstPage(); do {` .... }

olikraus commented 6 years ago 
void loop(void)
{
int sensorValue;

sensorValue = analogRead(A0); 
u8g2.firstPage();
do {
....
} while ( u8g2.nextPage() );
Freepl commented 6 years ago

A GREAT thank you .

The code works. screenshot023

Can you confirm the screen for oled 128 x 128 please . I'l receveid it soon. Are you ok with this choice ?

//Déclaration of screen 128x128 /* U8G2_SSD1327_EA_W128128_1_SW_I2C u8g2(U8G2_R0, A5, A4); ou le U8G2_SSD1327_MIDAS_128X128_1_SW_I2C u8g2(U8G2_R0, A5, A4); */

The good code `// Pour l'écran

include

include

//Pour les sondes

include //DS18B20 pour température de l'eau et de l'air

include

//les librairies de l'écran // pour les fontes https://github.com/olikraus/u8g2/wiki/fntlistall // poue l'écran https://github.com/olikraus/u8g2/wiki/u8g2setupc

// Déclaratipon de l'écran 128x64 U8G2_SSD1306_128X64_NONAME_2_SW_I2C u8g2 (U8G2_R0, A5, A4);

//Déclaration de l'écran 128x128 / U8G2_SSD1327_EA_W128128_1_SW_I2C u8g2(U8G2_R0, A5, A4); ou le U8G2_SSD1327_MIDAS_128X128_1_SW_I2C u8g2(U8G2_R0, A5, A4); /

// les 2 sondes DS18B20

define ONE_WIRE_BUS_1 2 // sonde pour l'eau pin 2

define ONE_WIRE_BUS_2 4 // sonde pour l'air pin 4

OneWire oneWire_in(ONE_WIRE_BUS_1); // sonde pour l'eau OneWire oneWire_out(ONE_WIRE_BUS_2); // sonde pour l'air DallasTemperature sensor_eau(&oneWire_in); // sonde pour l'eau DallasTemperature sensor_air(&oneWire_out); // sonde pour l'air

void setup(void) { / U8g2 Project: SSD1306 Test Board / pinMode(A4, OUTPUT); digitalWrite(A4, 0); u8g2.begin(); u8g2.setPowerSave(0);

// start serial port Serial.begin(9600); Serial.println("Dallas Temperature Control Library Demo - TwoPin_DS18B20");

// Start up the library sensor_eau.begin(); // sonde pour l'eau sensor_air.begin(); // sonde pour l'air

// déclaration de la pin 2 et 4 pinMode(2, INPUT); pinMode(4, INPUT);

int readValEau = analogRead(2);// met à zéro la sonde EAU int readValAir = analogRead(4);// met à zéro la sonde AIR }

void loop(void) {

int sensorValue = analogRead(A0); //A0

u8g2.firstPage(); do { // AFFICHAGE SUR SERIAL Serial.print("Recherche des temperatures..."); sensor_eau.requestTemperatures(); sensor_air.requestTemperatures(); Serial.println(" done");

// sonde EAU
Serial.print("Température eau: ");
Serial.println(sensor_eau.getTempCByIndex(0));

// sonde AIR
Serial.print("Température air: ");
Serial.println(sensor_air.getTempCByIndex(0));
delay ( 500);

/*/modele d'écriture
  u8g2.setFont(u8g2_font_ncenB14_tr);
  u8g2.setCursor(0, 15);
  u8g2.print("Hello World!");
*/
/* fonte 8 pixels u8g2_font_t0_11_tf
   fonte 10 pixels  u8g2_font_7x14_mr X11
   fonte 12 pixels u8g2_font_9x15_mn X11
   fonte 14 pixels u8g2_font_t0_18_mn UW ttyp0
    fonte 16 pixels u8g2_font_crox3c_tn crox
  fonte 20 pixels u8g2_font_fur20_tf Free Universal

*/

// Affichage Niveau batterie
u8g2.setFont(u8g2_font_t0_11_tf);///(u8g2_font_ncenB14_tr)
u8g2.setCursor(0, 8);
u8g2.println("NIVEAU BATTERIE");
//delay ( 1000);

// pour le voltage de la batterie
// Conversion du signal (which goes from 0 - 1023) to a voltage (0 - (V):
int sensorValue = analogRead(A0);//*******************************************************  A3 pour la voiture bateau
// écrit la valeur lue
float voltage = sensorValue * (5.0 / 1023.0);
u8g2.setCursor(0, 24);// position 0, sur la 1 ere ligne,
u8g2.print(voltage);
u8g2.print("V");

//Affichage  températures Air
u8g2.setFont(u8g2_font_t0_11_tf);
u8g2.setCursor(0, 44);
u8g2.println("TEMP. AIR ");
u8g2.print("  ");
u8g2.print(sensor_air.getTempCByIndex(0));
u8g2.print(" ");
u8g2.print("C");

// Affichage  températures Eau
u8g2.setFont(u8g2_font_t0_11_tf);
u8g2.setCursor(0, 64);
u8g2.println("TEMP. EAU ");
u8g2.print("  ");
u8g2.print(sensor_eau.getTempCByIndex(0));
u8g2.print(" ");
u8g2.print("C");

} while ( u8g2.nextPage() );

}`

olikraus commented 6 years ago

The W128128 is still under construction. The Midas variant should be ok.

Freepl commented 6 years ago

Bonjour olikraus,

thank you for all

Patrick Lacroix, patrick.lacroix18@free.fr 28/06/2018 ----- Message reçu ----- De : olikraus À : olikraus/u8g2 Date : 2018-06-28, 00:26:15 Sujet : Re: [olikraus/u8g2] u8g2 and screen oled i2c 128x64 (screen empty)and 128x128 soon (#644)

The W128128 is still under construction. The Midas variant should be ok. — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub, or mute the thread.

Freepl commented 6 years ago

Hello Question 1 Which code is good ? (This code works) void loop(void) { int sensorValue = analogRead(A0); //A0 u8g2.firstPage(); do {

or this code void loop(void) { int sensorValue; sensorValue = analogRead(A0); u8g2.firstPage(); do { Which is better ?

Question 2 I use int sensorValue = analogRead(A0) for this

// pour le voltage de la batterie // Conversion du signal (which goes from 0 - 1023) to a voltage (0 - (V): int sensorValue = analogRead(A0);//******************************************************* A3 pour la voiture bateau // écrit la valeur lue float voltage = sensorValue * (5.0 / 1023.0); u8g2.setCursor(0, 24);// position 0, sur la 1 ere ligne, u8g2.print(voltage); u8g2.print("V");

You says me use too int sensorValue; sensorValue = analogRead(A0); Goes it not to have there a problem? Should not write sensorValue = analogRead ( A4); ?

olikraus commented 6 years ago

Question 1: Both forms should be the same. There is no difference.

Question 2: Not clear what you mean? Is it about A0 and A4? I can not tell this, you should know this better.

In general: You should NOT use any analogRead(...) inside the u8g2.NextPage() while loop. So both of your analogReads should happen outside.

Freepl commented 6 years ago

Question 2: Not clear what you mean?

my origin code is for print on screen the level of battery. This code use int sensorValue = analogRead(A0); here

`......
void loop(void)
{
int sensorValue = analogRead(A0); //  Your code
u8g2.firstPage();
do { 
.........
// pour le voltage de la batterie
// Conversion du signal (which goes from 0 - 1023) to a voltage (0 - (V):
int sensorValue = analogRead(A0);//*****My code for print level battery***
// écrit la valeur lue
float voltage = sensorValue * (5.0 / 1023.0);
u8g2.setCursor(0, 24);// position 0, sur la 1 ere ligne,
u8g2.print(voltage);
u8g2.print("V");

and says me use this too befor my code. I would know if this make one problem and I asked you if I should not mark A4 in your analogRead instead of A0?

olikraus commented 6 years ago

As I said, there should be no analogRead(..) inside the u8g2-do-while loop at all.

Freepl commented 6 years ago

And then where I do have to put this code?

`// pour le voltage de la batterie
// Conversion du signal (which goes from 0 - 1023) to a voltage (0 - (V):
int sensorValue = analogRead(A0);//*******************************************************  A3 pour la voiture bateau
// écrit la valeur lue
float voltage = sensorValue * (5.0 / 1023.0);
u8g2.setCursor(0, 24);// position 0, sur la 1 ere ligne,
u8g2.print(voltage);
u8g2.print("V");
olikraus commented 6 years ago

Outside the u8g2-do-while loop

olikraus commented 6 years ago

... I think this can be closed...