which nrf9160dk gpios are available for external peripherals

[paul_tanner]

In addition to uarts, I2cs and SPIs I tried toggling some apparently spare pins without seeing voltage changes on the pins I tried.

Which pins are available for digital i/o? 

[Simon]

I assume you're using the nRF9160 DK. You could use whatever GPIO you want, but you should make sure that it's not occupied by something else on the DK. Take a look at the back of the DK (or nRF9160 DK board control), to see the default routing.

Check out the link below for instructions how to re-route GPIO to be used as pin-otuputs

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.5.0/nrf/ug_nrf9160.html#board-controller

If anything is unclear, please get back to me and I'll assist.

Best regards,

Simon

[paul_tanner]

Thx Simon

To avoid reprogramming the board controller I see that only PO.16 is available on the 9160dk.

I disabled i2c2 and that gave me POs 30 and 31.

Beyond that I will have to lose some of the leds and buttons.