how to transfer data from nRF52840DK to raspberry pi 4 without deploying bluetooth ble5 ?

[NRF52840DK&dev]

hello

i want to send the data from my 5 of nRF52840DK to 1 of raspberry pi4  , i known the nRF52840dk has built-in bluetooth ble5 and raspberry pi 4 also integrate bluetooth ble5 as well

BUT i do not want to send data with the bluetooth channel ,**  i want to transfer or send data from 5 nRF52840dk to 1 raspberry pi 4  WITH CABLE ** via GPIO pin or UART or SPI , i do not  know much about those , 

 how to send data from 5 nrf52840dk to 1 raspberry pi 4 with cable connection ?

[Simonr]

Hi

1. In all these cabled instances it's recommended to keep the wires as short and simple as possible. Will you not be able to use wires shorter than what's recommended?

2. Yes, no matter what language two devices using SPI are programmed in, the SPI peripheral won't care what language they both "speak" as it will just transfer data from one end to the other, and then each device handles that data so that it's readable on that side. One device being C/C++ and one being nodejs shouldn't have anything to say.

Best regards,

Simon

[NRF52840DK&dev]

1. if in my case , need the length of cable 120 cm , how to figure out ? still deploying SPI or other way , please recommend me

2. thanks , for the second answer , both board ( raspberry pi 4 and nRF52840dk . will be able to speak together with SPI  even though raspberry pi4 deploys nodejs and nRF52840dk deploys c/c++