Jetson nano no detect bus i2c

Robotics & Edge Computing Jetson & Embedded Systems Jetson Nano
1

During this month I have been testing the jetson nano and learning from it, today I decided to connect an adafruit PCA9685 board to control a servo, I plugged it in with the jetson nano disconnected as indicated in the steps and wiring, and so Maybe the I2C bus port does not recognize it, I have been investigating and this may be because the pins do not work (I think is hardware problem). All GPIO permissions and everything are installed.

I have also installed the adafruit library and followed the step-by-step tutorial of jetsonhacks i2c servokit and it still does not show me the board in the bus port when doing:

$i2cdetect -y -r 1

and

$i2cdetect -y -r 0

Is there a way to test the GPIO pins and the i2c bus port? The jetson nano was purchased a month ago here in a store in Spain, I am going to contact the store for the warranty

IMG_20240515_151325
IMG_20240515_1513251920×2550 253 KB

3

Please probe the i2c signal to check if device have ACK for the i2c scan command.

4

What is the command to test that? In case at some point I have to do some hardware testing, the only thing I have is a multimeter-tester, I don’t have an oscilloscope as I have read in other Nvidia support forums.

5

Please make sure the device is clock and power are on, otherwise must need scope to check the ACK command.

6

The device is plugged in, what do you mean by the clock? What is the ACK command? How is the ACK command executed in the terminal?

7

While you doing the i2cdetect the i2c bus will send command to slave address then the slave device should ack otherwise the i2c communicate will timeout and failed.

Thanks

8

I have run the i2cdetect command with the PCA connected and it doesn’t show me anything, but the command doesn’t fail. Attached screen image

i2cdetect
i2cdetect1204×1600 194 KB

9

The i2cdetect scan the bus but slave device didn’t ack.

Thanks

10

I have tested the board with a raspberry pi and if it detects it, I have wired it in these two ways when launching the commands:
J41 Pin 3 (SDA) → PCA9685 SDA
J41 Pin 5 (SCL) → PCA9685 SCL
J41 Pin 1 (3.3V) → PCA9685 VDC
J41 Pin 6 (GND) → PCA9685 GND

and

J41 Pin 27 (SDA) → PCA9685 SDA
J41 Pin 28 (SCL) → PCA9685 SCL
J41 Pin 1 (3.3V) → PCA9685 VDC
J41 Pin 6 (GND) → PCA9685 GND

In no case does it detect it