Issues when powering thingy:91 from solar panel

Hi!

I am trying to power the thingy:91 from solar panels and have some issues with the thingy:91 restarting when the solar panel receives a medium amount of light. The solar panel charges the device properly in full sun and does not interfere with the device when there is no sun. However, it starts rebooting when there is some light. I assume that this is because the USB solar panel outputs a voltage lower than 5V, but high enough that the regulators turn on so that the nrf9160 is supplied with too low voltage. I have tried with multiple USB-solar panels which most often are used to charge surveillance cameras.

Do you have any tips on how to run the thingy:91 from a USB solar panel properly?

Best regards,

Jonathan

Parents Reply
  • I have also been worried about the difficulties in upgrading the firmware, but hope it will be fine. However, I am worried that it will introduce more complexity as the nrf5340 has a network core and an application core, adding one more layer of things that can fail.

    We also had a lot of issues getting the thingy 91 stable especially when using hci_lpuart. Since we use Bluetooth very frequently, we had to discard hci_lpuart and ended up using lpuart between the two devices, programming the nrf91 and nrf52840 separately, and only sending simple command messages between the chips.

    Your products look really cool btw. We have started a company called botanist.ag, creating low-cost, accurate soil sensors for industrial use.

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