NRF24 & 16-Relay Module - Need 1 more Pin

Hey there,

So, I need to connect my arduino uno with a 16 Relay Module and a NRF24L01.

Unfortunately, I’m just 1 GPIO Pin short for the Relay as the NRF24 uses up 5 pins and the Relay board needs to be connected with another 16 pins.

Is there any way to “free up” one more Pin on the board itself?

I’m already using all Analog Pins as well.

Could I get the ISCP pins to work with the NRF? Or are they connected to Pins 9-13?

Since it’s just one Pin that’s missing, getting an extension board isn’t really worth it. If that’s the only way to make it work I’ll just have to leave out Relay #16

Areolys: Could I get the ISCP pins to work with the NRF? Or are they connected to Pins 9-13?

On the Uno, ICSP is connected to pins 11-13. The other 3 pins are Vcc, Gnd, and reset. So no, there are no extra pins there.

I can see a shift register or two in your future ...