For that, I need to know if they would work as intended, along with a code that I still don't understand how to implement for two I2C displays.
In principle, if we need is a Chip Selection pin connected to Arduino derived from either pulling up or down the D/C pin on the OLED module, then is it possible that the OLED modules with standard CS pin would work? I'm asking this question because I can still return the modules and replace them with the ones compatible. Thanks for digging the web! I tried to assimilate the datasheet, but I still don't understand how to identify the D/C pin. Here's a copy of the SSD1306 datasheet someone has posted: Pin D/C may be pulled high or low with a resistor to ground or Vcc. Your module's header pins do not provide the D/C pin, but you could look at the SSD1306 datasheet and figure out how/if your module is wired (hint: trace the foil pinouts that are directly soldered to the PCB). Does that mean I can opt for either of the following modules?Īccording to the SSD1306 datasheet, the I2C address can be set between two different addresses by the D/C pin. I'm not well versed in display technology and related protocols, but seems like I need a different module with additional two pins namely, CS and RST. U8G2_SSD1306_128X64_NONAME_F_4W_SW_SPI display2(U8G2_R0, /*CLK*/ 18, /*MOSI*/ 23, /*CS*/ 15,Įnsure that the buffer is sent after printing with each display as follows. I read U8G2 FAQs and the following code is suggested alongwith authorial comments:Ī: For each additional display, separate CS (Chip select) and RST (Reset) lines are required. Unfortunately the modules I have do not have such an option. Seems like the method is suggested for an OLED module with selectable address. Problem with SSD1306 LCD and U8glib - Displays - Arduino Forum How to address two such modules? #include There is one thread regarding SPI displays, but not the I2C OLED that I’m working with.Ī typical code like the following works only with one OLED module. I read in many forums that U8G2 specifically addresses the issues of multiple displays, but did not find any documentation oh how to integrate them. The modules I have possess no such capability. I searched many forums and most of them have tried to it with hardware address hack on the display module itself but with U8G.
I'm trying to connect two SSD1306 OLED displays with Arduino Uno, but don't know how to address them separately.
You should see the u8glib submenu in the Examples section.install u8glib in the libraries folder (unzip there).You could also follow this list of steps: Examples are here: Google Code Archive - Long-term storage for Google Code Project Hosting.