You can start with the HelloWorld example. Here’s the wiring diagram:Īnother option is to use the u8glib library, a versatile library that covers almost all monochrome LCDs and OLEDs. The OLED display directly connects to the Arduino UNO using I2C. The sketch for the video above is the sh1106_128圆4_i2c sketch included in the modified library I mentioned. Here’s a video showing the OLED screen with an Arduino UNO: First, you can use this modified Adafruit SSD1306 library with Adafruit GFX library and take advantage of the arsenal of graphics options similar to what I did with the 0.96” OLED. There are plenty of options when using this OLED screen with an Arduino board. If not for that difference in RAM, you could use the Adafruit SSD1306 library to use the 1.3” OLED. Actually, the only difference between the two controllers is the amount of RAM: the SH1106 controller has 132×64 pixel of RAM while the SSD1306 has 128×64 pixel. The display uses a SH1106 controller, which is different from the SSD1306 controller on the 0.96” OLED. We normally use the 7-bit address when writing programs. However, note that 0x78 here is an 8-bit address. Recall that I2C devices have their own addresses. The back of the display shows an address select option and by default is at 0x78. The 1.3” OLED display uses either 3.3V or 5V. This tutorial will primarily feature the I2C OLED because some users have trouble using it with non-Arduino boards. The SPI OLED has 7 pins while the I2C OLED has only four pins. There are two kinds of 1.3” OLED that you’ll find: SPI and I2C. UsersDonatechAppDataRoamingArduino15packagesesp8266hardwareesp82661.6. My guess is that the wire library adaptation discussed briefly in the github documentation did not get installed. OLED’s hold an advantage over LCDs and TFTs because they don’t need backlight and consumes very little power. Downloading and installing the new Arduino IDE for ESP8266.
Esp8266 problem with wire library how to#
This tutorial aims to guide you on how to use the 1.3” OLED with popular microcontroller boards such as Arduino and ESP8266. If that screen was too small, you can try upgrading to a slightly larger 1.3” display. You need to explicitly cast the third argument ( 400000) to uint32_t in order to tell the compiler which of the two functions you want to call: Wire.Last time, I featured the 0.96” OLED display and how to use with an Arduino microcontroller. For me it happened specifically when upgrading to arduino-esp32 version 2.0.1.
This happens with specific versions of the Arduino framework. home/uli/.platformio/packages/framework-arduinoespressif32/libraries/Wire/src/Wire.h:80:10: note: candidate: bool TwoWire::begin(uint8_t, int, int, uint32_t)īool begin(uint8_t slaveAddr, int sda=-1, int scl=-1, uint32_t frequency=0) Solution: home/uli/.platformio/packages/framework-arduinoespressif32/libraries/Wire/src/Wire.h:79:10: note: candidate: bool TwoWire::begin(int, int, uint32_t)īool begin(int sda=-1, int scl=-1, uint32_t frequency=0) // returns true, if successful init of i2c bus In file included from include/MyIO.hpp:2:0, Src/NyI2C.cpp:139:47: error: call of overloaded 'begin(const int&, const int&, int)' is ambiguous You are trying to call Wire.begin() for I2C using Wire.begin(Pin_I2C_SDA, Pin_I2C_SCL, 400000) īut you see an error message like src/MyI2C.cpp: In function 'void MyInitI2C()':
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