CAP1188 I2C SPI touch
SPI ou I2C touch sensor 8 touches 3-5V
Choix de l'adresse I2C
The AD pin is used to select SPI or I2C interface, and if I2C what address to use. See the wiring page for more details
If you want to set the I2C address to a different value you'll need to connect a resistor from AD to ground instead of a wire to 3V. The datasheet talks about different resistor values in table 3.1 - but since the breakout board already has a 150K resistor on it, you'll need to use different values so that the parallel resistance comes out right. Here's the values you should use:
- AD to 3V -> I2C address 0x28
- No resistor or wire attached to AD -> I2C address 0x29
- 600K resistor from AD to ground -> I2C address 0x2A
- 300K resistor from AD to ground -> I2C address 0x2B
- 180K resistor from AD to ground -> I2C address 0x2C