Troubleshooting the balenaFin


My balenaFin is not listed as a writable device in balenaEtcher

The most probable cause is that you are using a low-quality or a power-only microUSB to USB cable. If possible, use the cable provided with the balenaFin Developer Kit. If not using the Developer Kit cable, make sure you are using a high quality cable that has power and data capabilities.

I cannot see any wireless interface listed, and WiFi doesn't work

Please make sure you have the balena-fin device tree overlay set in your config.txt file (dtoverlay=balena-fin).

My WiFi signal is weak

There is a hardware switch on balenaFin that enables you to switch between the on-board and an external WiFi antenna - OFF for internal/on-board, ON for external.

I have a HAT which works on a Raspberry Pi 3 but does not work on balenaFin, or my Raspberry Pi display or camera don't work

Please make sure you have the balenaFin dt-blob.bin in the root of the boot partition (this in case of camera+display mode, this in case of dual camera mode)

My balenaFin is generating a lot of heat whilst running an application

If your application carries out intensive processing on the GPU, we highly recommend the use of the Raspberry Pi Compute Module 3+ Lite (CM3+L) over the older version, as it has much improved thermal performance. If you're using the Raspberry Pi Compute Module 3 Lite (CM3L/CM3+L) we suggest adding a heatsink to the system-on-chip on the CM3L/CM3+L. The heatsinks available for the Raspberry Pi 3 model B are compatible, depending on your device enclosure.

My balenaFin does not appear in the balenaCloud dashboard

Check the list below for potential issues.

  • Check that the balenaOS image flashed to the balenaFin has the correct SSID and password for your WLAN network

    • A pattern of 4-blinks on the ACT status LED indicates that the balenaFin cannot connect to a network
  • Ensure that the WLAN radio physical switch (mapping 33) is set to the OFF position if you are not using an external antenna
  • Verify that the power supply can maintain a minimum of 6 V (ideally 1.5 A or above) when powering the device from the Phoenix (mapping 23) or Barrel Adapters (mapping 24)

    • If USB1 ON and USB2 ON Status LEDs (mapping 18 & 23) are not turned ON, it is an indicator that the power supply may be insufficient for powering the balenaFin
    • The board may still power on if a low current or voltage is supplied, however the peripherals such as the Ethernet may not function correctly.
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