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I am running this code.

import serial
import time

serialport = serial.Serial('/dev/serial0',baudrate=1200, timeout=3)


t = "ttt"
while True:
   serialport.flush()
   serialport.write(t.encode())
   rcv =serialport.read()

   print(rcv)

I have enabled Serial on raspi-config.

I have connected RF receiver MX-RM-5V to Rx GPIO 15 and RF transmitter FS1000A to Tx GPIO 14 on a Rpi3B. Always the output of the received message is empty. I am also using piscope to monitor the outputs of the Pins. When I connect Rx and Tx Pins together, I can see the message correctly (bypassing the RFs). Receiver and Transmitter work perfectly because I can test them in a RpiPico that I own.

Is there something I miss?

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1 Answer 1

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You should probably be using /dev/serial0 rather than /dev/ttys0.

What response is the message "ttt" meant to elicit? readline expects a new line character in the response.

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  • tried also /dev/serial0 with no change in output. Also, checked with serialport.read() Commented Nov 26, 2021 at 15:51
  • 1
    You need to edit that information into your question. You also need to explain why you expect a response and what response you expect to ttt. All relevant information needs to be added to your question. Commented Nov 26, 2021 at 16:20

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