DEXI OS boot issue

dhart3003 · June 1, 2025, 7:18pm

Flashed 2 different sd cards with v0.9 apply power get solid green LED on frame (with RC on), flight controller have blinking periodic blue LED, red LED solid on, and after couple minutes LED ring on drone lights up white; however, cannot ping dexi (192.168.4.1). Reading ARK online blinking blue LED indicates flight controller is running and red LED indicates some issue. What enables white LED light ring? How to troubleshoot?

dhart3003 · June 1, 2025, 8:01pm

More info: I connected to HDMI to see boot sequence. Boot is starting. Early on I get dexi59b6 login cloud-init[953]: Cloud-init v24.4.1-0ubuntu~22.04.2 running modules:config
it hangs at this point

dbaldwin · June 2, 2025, 2:25pm

This is what enables the white LED ring:

github.com/DroneBlocks/dexi

dexi_py/dexi_py/led_flight_mode_status.py

main


      
                  '/fmu/out/vehicle_status',
                  self.listener_callback,
                  qos_profile)
          
          def listener_callback(self, msg):
          
              self.current_flight_mode = FlightMode(msg.nav_state)
          
              if(self.current_flight_mode != self.previous_flight_mode):
                  if self.current_flight_mode == FlightMode.STABILIZED:
                      solid = Solid(self.pixels, color=WHITE)
                      solid.animate()
                  elif self.current_flight_mode == FlightMode.ALTITUDE:
                      solid = Solid(self.pixels, color=YELLOW)
                      solid.animate()
                  elif self.current_flight_mode == FlightMode.POSITION:
                      solid = Solid(self.pixels, color=GREEN)
                      solid.animate()
                  elif self.current_flight_mode == FlightMode.OFFBOARD:
                      solid = Solid(self.pixels, color=PURPLE)
                      solid.animate()

Basically the Pi CM4 communicates with PX4 over a serial port and we have access to ROS2 topics such as this one:

github.com/DroneBlocks/dexi

dexi_py/dexi_py/led_flight_mode_status.py

main


      
          self.subscription = self.create_subscription(
              VehicleStatus,
              '/fmu/out/vehicle_status',
              self.listener_callback,
              qos_profile)

That gives us the flight mode status and allows us to give the following visual feedback:

STABILIZED → white
ALTITUDE → yellow
POSITION → green

When DEXI-OS is flashed it generally takes 5-7 minutes on first boot. If you get to a white LED that is good because it means everything is configured and the DEXI ROS2 software is running. You should see it broadcast a network SSID. Connect to the wifi network with password and then you should be able to ping 192.168.4.1. If you can’t then perhaps there is a firewall issue.

Let us know and we’re here to help however we can.

dhart3003 · June 2, 2025, 8:15pm

Thank you. I reflashed and gave os longer period for initial configuration. All works fine. Patience is a virtue.

dbaldwin · June 2, 2025, 8:36pm

LOL sorry we made you wait that long. Working on a new DEXI-OS that boots much faster.

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DEXI OS boot issue

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