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I have used a=ser.write("TEST".encode()) in my code to send data using UART gpio in Rpi. The code shows no error but when I print a,it gives me the length only. Actually i am trying to interface Rpi and Nordic Nrf52832 using UART. I want to send data to nrf from pi.

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What return value do you expect instead?

It is normal that a write call returns the number of bytes written, a successful write returns the number of bytes it was supposed to write.

You can use a check similar to this

if (ser.write (data, length) != length)
  // Write not successful
  • Thanks for the info.I basically had a doubt whether data is being transmitted or not. How to check that? – M Rafiq Jan 22 at 6:06

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