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