Category:IIC
- 总线， 不同设备地址
Schematic
ADC and IO expander board SCH
Sensor pack board SCH
IIC MISC (OLED RTC EEPROM) board SCH
TI series IIC sensors
Expansion
MCP23017 to GPIOs expansion, SCH
IIC Devices
| Category | Alternative 1 | Default IIC Utility Address |
|---|---|---|
| Pressure | BMP280 | Use BMP180 |
| Temperature huminity | AM2322 | |
| Light sensor | BH1750 | |
| RTC | DS1307 | |
| Analog Expander | PCF8591 | 0x48 |
| GPIO Explander | PCF8574T, MCP23008 | 0x20 |
| I2C Expander | tca9548a | |
| Servo Drive | PCA9685 | |
| EEPROM | AT24C256 | |
| Display | IIC OLED | |
| Accelerator | ADXL345 | |
| Segment Display | TM1650 | |
| Char Display | PCF8574 1602 | |
| ADC | ADS1110 |
- I2C device found at address 0x3C ! // IIC OLED
- I2C device found at address 0x75 ! // IP5306
- ST25DV ............................................0x2D.....................................0x53...0x57........................................
- EEPROM + RTC + OLED ...........................................................0x3C...................0x50.......................0x68.......................
- AHT20: 0x38
- K23-1025 - 0x1F
- EEPROM 0x50
I2C 3-in-1 Breakout
I2C device found at address 0x3C ! // this is OLED 128x32 I2C device found at address 0x50 ! I2C device found at address 0x68 !
- To use on board 128x32 OLED, define first:
// #define SSD1306_128_64 #define SSD1306_128_32 // #define SSD1306_96_16
- Demo code read EEPROM and display on OLED, please wait 2-3 seconds until OLED initated after restart
i2cdetect
- Linux (RPI)
i2cdetect -y 1
- Arduino scanner skecth, please find in our arduino github
linux raspberry pi scanner
arduino I2C scanner
- Nano -> i2cdetect -r -y 0
EEPROM Read
| Status | Hardware | Code Next Step | Hardware Next |
|---|---|---|---|
| 08 | already send start | send SLA+R | Do code and wait ACK |
| 40 | already send SLA+R + got ACK | X | X |
| 50 | Get REV data +ACK | Example | |
| 58 | Get REV data + NO ACK | Example |
Wire
- Wire.begin(4, 5);