Welcome to EnviroDIY, a community for do-it-yourself environmental science and monitoring. EnviroDIY is part of WikiWatershed, a web toolkit designed to help citizens, conservation practitioners, municipal decision-makers, researchers, educators, and students advance knowledge and stewardship of fresh water. New to EnviroDIY? Start here

Reply To: 12 V External Power and Serial Viewer

Home Forums Infrastructure and Equipment 12 V External Power and Serial Viewer Reply To: 12 V External Power and Serial Viewer

#18108
Shannon Hicks
Moderator

    If you’re using an external FTDI or CP2102 interface board to program your Mayfly via the Mayfly’s FTDI socket, then the Mayfly dipswitch labeled USB should be turned off before connecting the external interface to the Mayfly, and it should stay off the entire time.

    What version of the Arduino IDE are you using?  From your screenshot, it looks like you might be using one of the newer versions.  On our software instructions page here:  https://www.envirodiy.org/mayfly/software/    we recommend that you use the Legacy v1.8.x version since there are some quirks about the newer v2.0 and web-based Arduino IDE’s that can cause issues with the Mayfly.

    When you plug your CP2102 Friend into your computer’s USB port, what does Windows Device Manager say?  Does a “Silicon Labs CP210x USB to UART Bridge (COMx)” show up under the “Ports (COM & LPT)” list, or is it shown under an Unknown Device tab with a yellow triangle?