china i2c iic oled lcd module quotation

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AZDelivery 0.96 Inch OLED Display I2C SSD1306 Chip 128 x 64 Pixels I2C Display Module with White Characters Compatible with Arduino and Raspberry Pi with E-Book Included!

✔️️ Easy screen connection with Raspberry Pi and other microcontrollers by I2C interface via only four pins! Thanks to the integrated display adapter, the module can be connected to the I2C bus immediately.

✔️️ By changing the I2C direction and soldering a third contact, two displays can be operated simultaneously. The OLED module can be connected to 3.3 V.

Select from the drop-down the device you want to add, in this case «Display - OLED SSD1306» (or, better yet, the «Display - OLED SSD1306 / SH1106 Framed», as I indicate below -recommended-)

If you still want more display options, I recommend that when you select the display in the ESP Easy drop-down menu, you try the «Display - OLED SSD1306 / SH1106 Framed" (instead of "Display - OLED SSD1306» that we have used before).

Note that "Display - OLED SSD1306 / SH1106 Framed» takes some more memory from ESP8266 that the «Display - OLED SSD1306«, so on devices with many sensors connected or many rules long lines could give you memory problems (normally it shouldn"t give you any problems).

If you want you can write directly on the screen from the rules using the command oledframedcmd, , (command must be a single parameter so if it includes spaces or commas you will have to write it between parentheses, as in the following example), which gives you much more control.

Here you can see a CO2 meter prototype with two 1.3 ″ OLED displays, in one it shows the CO2 concentration permanently and in the other it can show different data, such as temperature, humidity, etc.

As we have seen before, the OLED display has an I2C address that the ESP8266, ESP32 or another microcontroller uses to communicate with it. What we need to connect two displays to a single microcontroller is that each display has its own I2C address and simply, we will connect them in parallel and we will use them as if they were two completely independent screens.

IMPORTANT: It is particularly important that you make sure to use OLED displays that allow changing the I2C address (many do not allow it), if not, you will not be able to do it this way (you would need an I2C multiplexer, which complicates things a bit). A little further down I leave you the links to the screens that I use and that allow I2C address change.

For example, this 1.3 ″ OLED screen (larger than the normal ones, which are 0.96″) allows to change I2C addresses, between 0x78 and 0x7A, by moving a resistance:

You can find this 1.3″ SSD1306 display in AliExpress by clicking here. If you prefer a display 0.96 ″ SSD1306 that allows to change the I2C address, I have bought this. Both allow to change the I2C address.

You simply have to add in the configuration (Devices tab) two devices «Display - OLED SSD1306 / SH1106 Framed» (exactly the same as we have seen before with a single screen) and configure each one independently, with the data we want:

Sometimes I2C addresses may not match what you put on the screen (For example, in this screen that I have used, in the silkscreen it says that the addresses are 0x78 and 0x7A but the real addresses are 0x3C and 0x3D.

ususally, I don"t ask for help, I find everything on the web... But today I"m stuck. I got one of these chinese 0.91" 128x64 OLEDs, and I can"t figure how to address it. If it is alone on the I²C bus, no problem. (I use u8glib).

But I need it to be in "parallel" with a 2004 LCD. As long as the OLED is alone, everything"s fine. As long as the LCD is alone, no problem. But when the 2 displays are connected, only the LCD works.

I can"t find the address for the OLED : scanners hang ! I found somewhere 0x3C, but it does not make any difference. It is a project based on a Blue Pill (STM32, and the "Roger" STM32Duino lib). A finite state machine (poor man"s PLC). 2 displays are needed : one on the door of a large enclosure, one on the DIN rail module I"m buiding (v2.0, the 1st one used 2 LCD)...