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Using D0/D1/D2/D3 on BLE Nano 2


Hello All,

I was wondering, is there something specific I need to do to use D0, D1, D2 or D3? I can use D4 or D5 as an digital input no problem, but it won’t work on D0/D1/D2/D3. I’m assuming at something to do with those pins sharing the serial connections.

Any help would be appreciated as I’d like to use 4 DIs without having to use D6/D7/D8/D9.



Have you found a solution for that? I have the same problem, but only with PINs D0 and D1. The others are fine


Hi all,

First of all, make sure you are not utilizing the Serial, as well as not utilizing the alternative functions, like SPI or SPI slave.

Any way, just try the simple blinky example that toggles the D0 ~D3.

Best regards,


Hello everyone,
I have the same problem a year later. Maybe it is a little bit late, but I had the same behavior and the solution is to disconnect the BLE Nano v2 from DAPlink.
The DAPLink pushed the signal to GND.

Best regards