Welcome to EnviroDIY, a community for do-it-yourself environmental science and monitoring. EnviroDIY is part of WikiWatershed, an initiative of Stroud Water Research Center designed to help people advance knowledge and stewardship of fresh water.
New to EnviroDIY? Start here

Reply To: Testing TTL-RS485 Adapters

Home Forums Mayfly Data Logger Testing TTL-RS485 Adapters Reply To: Testing TTL-RS485 Adapters

#15561
James_NZ
Participant

    Hi @aufdenkampe,

    That’s really good news.  Yes I was reading through some historical issues on git-hub about problems with the Polou step-up module and inability to set brush intervals. My 511-A seems to be functioning well so I’m assuming the Polou step-up issue is also solved.

    One quick question, In your view, is the 511-A worth the extra money over the 510-B?

    Edit: I also need to thank you for the 120 ohm resistor trick.  So far I have tested four TTL-RS485 adapters and all of them required a 120 ohm resistor to function properly.  They all work with that slight mod though!

    James