Color i2cbus Raspberry Pi yellow SCL GPIO 3 / SCL (Pin 5) orange SDA GPIO 2 / SDA (Pin 3) Red VCC / V 3,3V (pin 1) Black GND GND (Pin 6)
Example with both a SSD1306 and PCA9685 on the bus
sudo raspi-config
# enable i2c in Interfacing options
sudo i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- 3c -- -- --
40: 40 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: 70 -- -- -- -- -- -- --
https://www.bluedot.space/tutorials/how-many-devices-can-you-connect-on-i2c-bus/
It seems recommendations go from 1kΩ (maximize speed) to 10kΩ (minimize power consumption) 4.7 kΩ is a compromise
Color i2cbus Raspberry Pi yellow SCL GPIO 3 / SCL (Pin 5) orange SDA GPIO 2 / SDA (Pin 3) Red VCC / V 3,3V (pin 1) Black GND GND (Pin 6)
Example with both a SSD1306 and PCA9685 on the bus
sudo raspi-config
# enable i2c in Interfacing options
sudo i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- 3c -- -- --
40: 40 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: 70 -- -- -- -- -- -- --
https://www.bluedot.space/tutorials/how-many-devices-can-you-connect-on-i2c-bus/
It seems recommendations go from 1kΩ (maximize speed) to 10kΩ (minimize power consumption) 4.7 kΩ is a compromise
Most upvoted answer: I include 4K7 resistors in the kit which seems like a reasonable compromise for most users.
Therefore,we can selectany available resistor value between 966.667Ωand 1.77kΩ. The valueof the pull up resistor can be selected basedon the trade-off for the power consumption and speed.
Most upvoted answer: I include 4K7 resistors in the kit which seems like a reasonable compromise for most users.
Therefore,we can selectany available resistor value between 966.667Ωand 1.77kΩ. The valueof the pull up resistor can be selected basedon the trade-off for the power consumption and speed.