Upload program using serial port (Teensy 3.2)

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Sandip

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Hello everyone!

I have Teensy 3.2 and need to upload the program directly from the PC via the serial port (TX, RX). I do not want to use the USB port of Teensy. Now I try TTL for it, but it is not working. Can you please give me any suggestions?

Thanks in advance and have a nice day.

Yours sincerely,
Sandip
 
Thank you for your answer. Suppose my teensy is already programmed via USB and then I change some parameters in the program and I want to upload program in the same teensy without USB, then any other options are available or not?

Thank you in advance.
 
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