Support for SSD1327 96 x96 Gray Oled Display

[OBorro]

Hi All,

I am using two seeed Gray Oled display and Arduino Mega - Grove Shield - I2C port to show different messages in each display. Those display only have one address 0x3C. Using I2C port, the pins for clock and data are 21 and 20. I already checked in other forum about it, but I didn't find nothing about it. So any idea to make that happen? This is the code I have:

//U8G2_SSD1327_SEEED_96X96_F_HW_I2C u8g2(U8G2_R0, / reset=/ U8X8_PIN_NONE); // Seeedstudio Grove OLED 96x96 //U8G2_SSD1327_SEEED_96X96_F_SW_I2C u8g2(U8G2_R0, / clock=/ SCL, / data=/ SDA, / reset=/ U8X8_PIN_NONE); // Seeedstudio Grove OLED 96x96

U8G2_SSD1327_SEEED_96X96_F_SW_I2C d1(U8G2_R0, 21, 20); U8G2_SSD1327_SEEED_96X96_F_SW_I2C d2(U8G2_R0, 21, 20);

void setup(void) {

d1.begin();{ d1.clearBuffer(); // clear the internal memory d1.setFont(u8g2_font_ncenB10_tr); // choose a suitable font d1.drawStr(0,20,"Voltage #1"); // write something to the internal memory d1.sendBuffer(); // transfer internal memory to the display delay(1000); } {

d2.begin(); d2.clearBuffer(); // clear the internal memory d2.setFont(u8g2_font_ncenB10_tr); // choose a suitable font d2.drawStr(0,20,"Voltage #2"); // write something to the internal memory d2.sendBuffer(); // transfer internal memory to the display delay(1000); } } void loop(void) { }

[olikraus]

If the address is the same, then the displays must not share the same gpio pins. You need four pins in this cases.

[OBorro]

Thanks for your help. The arduino grove mega shield has 3 port I2C and I using just two of them. Is there a way I can change the I2C address to separate the displays? Could you provide me more details about the previous comment? I do not have to much experience working with arduino.

[olikraus]

With U8g2 SW_I2C you can use ANY pins of the Arduino Mega. You are not restricted to any special ports. But i guess this would require to cut the wires of your displays and connect them directly to some ports.

[olikraus]

Another option could be to use U8G2_SSD1327_SEEED_96X96_F_HW_I2C d1(...) and U8G2_SSD1327_SEEED_96X96_F_2ND_HW_I2C d2(...)

[olikraus]

excause me... some i always hit the close button

[OBorro]

Don't worry. Ok, I will try that and then I let you know what happen. Thank you for your support.

[olikraus]

you mean this shield? https://www.generationrobots.com/img/cms/GorveMegaShield/800px-Megashield001.jpg

[olikraus]

you could also do this:

U8G2_SSD1327_SEEED_96X96_F_SW_I2C d1(U8G2_R0, 10, 11); U8G2_SSD1327_SEEED_96X96_F_SW_I2C d2(U8G2_R0, 8, 9);

and connect displays into J11 and J12 This should work (altough it might be slow). Not sure whether the 2ND_HW_I2C can work.

[OBorro]

Yes, That is correct. Ok. I will try that.

[OBorro]

Thank you so much for your help. It is working finally with the last option that you gave me. Problem solved.

[olikraus]

Great