EstarDyn 1.3 inch OLED I2C 128x64 compatibility

[balthz]

Hi!

In case anybody else is running into this: I managed to this OLED display working using https://github.com/durydevelop/arduino-lib-oled with the code

#include <oled.h>
OLED display = OLED(A2, A3, NO_RESET_PIN, 0x3c, 128, 64, true); // A2 data, A3 clock

void setup()
{
  Serial.begin(115200);

  Serial.printf("useOffset()\n");
  display.useOffset(true);
  Serial.printf("begin()\n");
  display.begin();
  Serial.printf("setTTYMode()\n");
  display.setTTYMode(true);
  Serial.printf("clear()\n");
  display.clear();
  Serial.printf("printf()\n");
  display.printf("Hi!");
  Serial.printf("displat()\n");
  display.display();
}

void loop()
{
}

Given that library doesn't leverage hardware I2C and I need low energy consumption, I wanted to try U8G2. However, I tried all IC2 128x64 constructors and didn't get it to work.

I did notice that https://github.com/durydevelop/arduino-lib-oled sends different data to the chip than e.g. with U8G2_SH1106_128X64_VCOMH0_F_SW_I2C u8g2(U8G2_R0, A3, A2, U8X8_PIN_NONE). To see this, I changed

https://github.com/durydevelop/arduino-lib-oled/blob/f29660f46bd523d7a724b0f2b5f86ef60dcb2546/src/oled.cpp#L188-L190

to

bool OLED::i2c_send(uint8_t byte)
{
    Serial.printf("i2c_send(");
    if (byte < 16) Serial.print("0");
    Serial.print(byte, HEX);
    Serial.printf(")\n");
    
    for (int_fast8_t bit = 7; bit >= 0; bit--)

Here's the output of this, with some annotations referring to the Serial.printfs in the above code. The first bytes are coming from https://github.com/durydevelop/arduino-lib-oled/blob/f29660f46bd523d7a724b0f2b5f86ef60dcb2546/src/oled.cpp#L260-L299 and differ from what U8G2_SH1106_128X64_VCOMH0_F_SW_I2C() produces.

useOffset()
begin()
i2c_send(78)
i2c_send(00)
i2c_send(AE)
i2c_send(D5)
i2c_send(80)
i2c_send(A8)
i2c_send(3F)
i2c_send(D3)
i2c_send(00)
i2c_send(40)
i2c_send(8D)
i2c_send(14)
i2c_send(20)
i2c_send(00)
i2c_send(A1)
i2c_send(C8)
i2c_send(DA)
i2c_send(12)
i2c_send(81)
i2c_send(80)
i2c_send(D9)
i2c_send(22)
i2c_send(DB)
i2c_send(20)
i2c_send(A4)
i2c_send(A6)
i2c_send(2E)

begin() -> display()
i2c_send(78)
i2c_send(00)
i2c_send(B0)
i2c_send(00)
i2c_send(10)

begin() -> send data
i2c_send(78)
i2c_send(40)
i2c_send(00) // repeated many times
i2c_send(00)
i2c_send(78)
i2c_send(00)
i2c_send(B1)
i2c_send(00)
i2c_send(10)
i2c_send(78)
i2c_send(40)
i2c_send(00) // repeated many times
i2c_send(78)
i2c_send(00)
i2c_send(B3)
i2c_send(00)
i2c_send(10)
i2c_send(78)
i2c_send(40)
i2c_send(00) // repeated many times
i2c_send(78)
i2c_send(00)
i2c_send(B6)
i2c_send(00)
i2c_send(10)
i2c_send(78)
i2c_send(40)
i2c_send(00) // repeated many times

begin() -> set_power(true)
i2c_send(78)
i2c_send(00)
i2c_send(8D)
i2c_send(14)
i2c_send(AF)
setTTYMode()
clear()
printf()
i2c_send(78)
i2c_send(00)
i2c_send(B0)
i2c_send(00)
i2c_send(10)
i2c_send(78)
i2c_send(40)
i2c_send(00)
i2c_send(00)
i2c_send(00)
i2c_send(7F)
i2c_send(08)
i2c_send(08)
i2c_send(08)
i2c_send(7F)
i2c_send(00)
i2c_send(00)
i2c_send(44)
i2c_send(7D)
i2c_send(40)
i2c_send(00)
i2c_send(00)
i2c_send(00)
i2c_send(00)
i2c_send(2F)
i2c_send(00) // repeated many times
…
i2c_send(78)
i2c_send(00)
i2c_send(B3)
i2c_send(00)
i2c_send(10)
i2c_send(78)
i2c_send(40)
i2c_send(00) // repeated many times
i2c_send(78)
i2c_send(00)
i2c_send(B6)
i2c_send(00)
i2c_send(10)
i2c_send(78)
i2c_send(40)
i2c_send(00) // repeated many times
i2c_send(78)
i2c_send(00)
i2c_send(B7)
i2c_send(00)
i2c_send(10)
i2c_send(78)
i2c_send(40)
i2c_send(00) // repeated many times

Does anybody have more knowledge than me to point me to what changes U8G2 would be required to make this chip work?

[olikraus]

Which had been the full u8g2 code for your tests?