If your LCD has a PCF8574 chip from Texas Instruments, its I2C address is 0x27; if it has a PCF8574 chip from NXP Semiconductors, its I2C address is 0x3F. If you’re not sure what your LCD’s I2C address is, you can run a simple I2C scanner sketch that scans your I2C bus and returns the address of each I2C device it finds.

默认情况下，使用板载上拉电阻将所有3个地址输入均拉为高电平，使PCF8574的默认I2C地址为0111111 Binary或0x3F Hex。 通过短路跳线，地址输入被拉低。 如果要短路所有三个跳线，则地址将为0x38。

List of I2C/TwoWire addresses and devices using them. I2C Devices. I2C Devices; I2C Addresses; I2C Resources; Search. I2C Address List. Address Devices Reserved; 0x00: 0x01: 0x02: 0x03: ... 0x3f: PCF8574AP: 0x40: Si7021 HTU21D-F TMP007 TMP006 PCA9685 INA219 TEA6330 TEA6300 TDA9860 TEA6320 TDA8421 …

In this tutorial you will learn how to use an I2C LCD 16x2 display (and 20x4, e.t.c.) with Arduino uno. With I2C module you will be able to connect the LCD with Arduino board with only two cables! The i2c module has a built in potentiometer for contrast a

2020年12月27日 · 朋友分享的一份i2c器件地址清单，我觉得还不错。 Chirp! Water sensor (0x20) This address is really popular with real time clocks, almost all of them use 0x68! 如果说我的文章对你有用，只不过是我站在巨人的肩膀上再继续努力罢了。 若在页首无特别声明，本篇文章由 Schips 经过整理后发布。 背景 朋友分享的一份i2c器件地址清单，我觉得还不错。 reference：https://learn.adafruit.com/i2c-addresses/the-list Special cases PCA9685 can be …

2017年7月29日 · The only bad news about I2C is that each I2C device must have a unique address - and the addresses only range from 0 to 127 (aka 0 to 0x7F hex). Since we deal with so many I2C devices we thought it would be handy to have a table with all the most common sensors and modules we encounter, and their I2C address!

All OLED controllers below use either 0x3C or 0x3D depending on a control pin. Hardware selectable on some displays with a solder jumper. List of I2C address for various devices by address range. - I2C_Addresses/0x30-0x3F.md at main · adafruit/I2C_Addresses.

To add a new I2C address, go to the markdown page associated with the first hex digit. For example, if you want to add a new device with an I2C address of 0x4E , you would go add it to the 0x40-0x4F.md page.

The 16×2 character LCD has two rows with the ability to display 16 ASCII characters on each row. Normal 16×2 character LCDs use 7 digital pins, while this module with I2C interface has reduced this number to 2 pins. A potentiometer is also included to adjust the display contrast.

2020年2月2日 · The code snippet shows that we are using the Arduino LiquidCrystal_I2C library which is developed to support I2C LCDs. LiquidCrystal_I2C(I2C_addr, No_of_cloumn, No_of_rows). LiquidCrystal_I2C(0x3F, 16, 4): 0x3F is I2C address and 16 cloumns and 4 rows. setCursor is used to set the cursor position for displaying the text on LCD. The syntax is