Can't communicate with SI7210 sensor

[Stencht]

Hi all,

I'm trying to use the zephyr driver for the SI7210 sensor.
A newbie as I am, I started with the example of MPU6050 which I have lying around to check if this worked on my board - nrf5340 dk - and it did. Then tried to include the SI7210 sensor, but I always got the error that the device is not ready.

With proj.conf:

CONFIG_I2C=y
CONFIG_SENSOR=y
CONFIG_MPU6050_TRIGGER_NONE=y
CONFIG_CBPRINTF_FP_SUPPORT=y
CONFIG_SI7210=y

and overlay:

&i2c1 {
    si7210@30 {
        compatible = "silabs,si7210";
        reg = <0x30 >;
    };
    mpu6050@68 {
        compatible = "invensense,mpu6050";
        reg = <0x68 >;
        label = "Magnetic proximity sensor";
        status = "okay";
    };
};

Then I used I2C shell to scan the devices (using this tutorial). There I saw that the address was indeed what I expected (0x30):

i2c scan i2c@9000

     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f

00:             -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: 30 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
1 devices found on i2c@9000

But when running I2C Sensor Shell, I don't see it popping up:

sensor get -h

get - Get sensor data. Channel names are optional. All channels are read when no
      channels are provided. Syntax:
      <device_name> <channel name 0> .. <channel name N>

Subcommands:
  clock@5000
  gpio@842800
  gpio@842500
  psa-rng
  uart@8000
  i2c@9000

Anyone an idea what the issue could be? Is the driver faulty or am I missing something?

• Hardware: NRF5340 DK + SI7210
• Software: nRF Connect SDK v2.4.0

[Stencht]

My bad, I was missing some pull-up resistors on the SDA and SCL lines (which were included in the breakout board of the MPU6050 but not on the SI7210). 🥟