Minicom: send string when newline is detected

I have 3 different USB-to-UART FTDI cables and use minicom to debug some device. My problem is only one of these cables can buffer characters until I send a newline. Eg when I type the string "help", the device on the other side will not output the help string until I press Enter. The two other cables don't seem to wait for a newline when sending, typing the same string "help", I am seeing no output and newline will just add new lines to whatever I have typed. I have enabled the following settings each time I start the minicom session: - echo on - linefeed on - carriage return on The cables I am using are: - TTL-232R-3V3 (this one works) - TTL-232R-3V3 - TTL-234X-3V3 Initially, I thought this was an issue with the cable but because another TTL-232R-3V3 has not worked, I think this may be a minicom configuration. But I can't find any configuration that would control this behaviour for my minicom session.