Python Library Navigator help with BMP280

Blue Robotics Software
1

Hi everyone! I’m new to the forum, and I’m trying to some example code using the Blue Navigator Flight Controller for an ArduSub.

Here’s what Im running:

  • Raspberry Pi 4b
  • Navigator Flight Controller
  • Blue OS 1.4.2
  • Using Jupyter to run code
import os
import platform
import bluerobotics_navigator as navigator
from bluerobotics_navigator import AdcChannel, UserLed

from bluerobotics_navigator import NavigatorVersion, Raspberry
navigator.set_navigator_version(NavigatorVersion.Version1)
navigator.set_raspberry_pi_version(Raspberry.Pi4)


def navigator_check():
    print(f"Functions available: {navigator.__all__}")

    if os.environ.get("CI") == "true":
        print("Running in CI")
        print("Not possible to test navigator sensors yet.")
        return

    print("Initializing navigator module.")

    if platform.machine() == "aarch64":
        # It's possible to set the configuration before initializing the navigator, check this example
        from bluerobotics_navigator import NavigatorVersion, Raspberry
        print("Setting up for Navigator V2 on Raspberry Pi 5")
        navigator.set_rgb_led_strip_size(1)
        navigator.set_navigator_version(NavigatorVersion.Version2)
        navigator.set_raspberry_pi_version(Raspberry.Pi5)

    navigator.init()

    print("Setting led on!")
    navigator.set_led(UserLed.Led1, True)

    print(f"Temperature: {navigator.read_temp()}")

    print(f"Pressure: {navigator.read_pressure()}")

    print(f"Leak sensor: {navigator.read_leak()}")

    Data = navigator.read_adc_all()
    print(
        f"Data ADC Channels: 1 = {Data[0]}, 2 = {Data[1]}, 3 = {Data[2]}, 4 = {Data[3]}"
    )

    print(f"Data ADC Channel: 1 = {navigator.read_adc(AdcChannel.Ch1)}")

    Data = navigator.read_mag()
    print(f"Magnetic field: X = {Data.x}, Y = {Data.y}, Z = {Data.z}")

    Data = navigator.read_accel()
    print(f"Acceleration: X = {Data.x}, Y = {Data.y}, Z = {Data.z}")

    Data = navigator.read_gyro()
    print(f"Gyroscope: X = {Data.x}, Y = {Data.y}, Z = {Data.z}")

    print("Setting led off!")
    navigator.set_led(UserLed.Led1, False)


if __name__ == "__main__":
    navigator_check()

Im trying to run this code and then this is the output I get

Functions available: ['AdcChannel', 'UserLed', 'AxisData', 'Raspberry', 'NavigatorVersion', 'init', 'set_rgb_led_strip_size', 'set_navigator_version', 'set_raspberry_pi_version', 'self_test', 'set_led', 'get_led', 'set_led_toggle', 'set_led_all', 'set_neopixel', 'set_neopixel_rgbw', 'read_adc_all', 'read_adc', 'read_pressure', 'read_temp', 'read_leak', 'read_mag', 'read_accel', 'read_gyro', 'set_pwm_enable', 'set_pwm_freq_hz', 'set_pwm_channel_value', 'set_pwm_channel_duty_cycle', 'set_pwm_channels_value', 'set_pwm_channels_duty_cycle', 'set_pwm_channels_values', 'set_pwm_channels_duty_cycle_values']
Initializing navigator module.
Setting led on!
thread '<unnamed>' panicked at 'Failed to create Bmp280: Other(())', /root/.cargo/registry/src/index.crates.io-6f17d22bba15001f/navigator-rs-0.6.0/src/lib.rs:442:22
---------------------------------------------------------------------------
PanicException                            Traceback (most recent call last)
Cell In[15], line 61
     57     navigator.set_led(UserLed.Led1, False)
     60 if __name__ == "__main__":
---> 61     navigator_check()

Cell In[15], line 32, in navigator_check()
     29 navigator.init()
     31 print("Setting led on!")
---> 32 navigator.set_led(UserLed.Led1, True)
     34 print(f"Temperature: {navigator.read_temp()}")
     36 print(f"Pressure: {navigator.read_pressure()}")

PanicException: Failed to create Bmp280: Other(())

It keeps on trying to create the Bmp280 but I know the Navigator is running a BMP390. What can i do about this to fix it?

2

I figured it out, I just had to switch this

navigator.set_navigator_version(NavigatorVersion.Version1)

to

navigator.set_navigator_version(NavigatorVersion.Version2)

I didn’t realize there were 2 versions until I dug deeper in the navigator library.