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Original thread:
Post 11 made on Wednesday June 1, 2016 at 09:46
Lurking Member
June 2016
I know this is 6 years old thread but I had the same problem and this page always pop-uped, so if any one will be reading this.

The solution for me:
I was using USB - TTL adapter (logic level 0V to 3.3V/5V) and its no good (Arduino, USB-Serial etc...)
then when I switched to RS-232 (-3~-25V to +3~+25V), Bam! Works:)

I used the native COM1 port of my computer for RS-232
If you need to connect it to a micro-controller you can use MAX232 / MAX3232

you can read about the difference here: [Link:]

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