It appears Puck.JS does not have on board LFXO, If I connect one 32khz crystal to pins do I need to change settings somewhere?
How about nRF52DK? It already has a LFXO. What settings I need to change to start saving power even if it is not much difference between RC XO (<5uA).
You're right, there's no external oscillator. The Softdevice actually does a pretty good job of calibrating its RC oscillator. Pin D0 is used for the button, so I don't believe you could add an RC oscillator to the Puck itself.
On the DK it's not enabled either. You could recompile with this changed: https://github.com/espruino/Espruino/blob/master/targets/nrf5x/bluetooth.c#L1838
But it's been left out because I wan't able to find a way of checking if the LSE is there, and if it doesn't work when you upload the image then it's particularly frustrating.
Thank you very much Gordon for great products as well as a great support. I will do my part to support the Espruino by buying even more official hardware.
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