Welcome to EnviroDIY, a community for do-it-yourself environmental science and monitoring. EnviroDIY is part of 
@mattschi
Active 3 years, 4 months ago-
matt replied to the topic Board Basics in the forum Mayfly Data Logger 3 years, 4 months ago
Beth, in your third to last paragraph of your first post you started to touch on what I’m trying to understand. For example I am using pins D7, D11, D21, and I can refer to them in the code as 7, 11, 21 in basic sketches. But what does scl, sda, on the digital side, or AA1, AA3, etc on the analog side mean and how do I refer to those pins in the…[Read more]
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matt replied to the topic Board Basics in the forum Mayfly Data Logger 3 years, 4 months ago
I have looked through those sources and while I may have missed something in the LearnEnviroDIY link. Nothing answers my above question in a language I could understand.
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matt started the topic Board Basics in the forum Mayfly Data Logger 3 years, 4 months ago
I am learning to use this board and so far found the basic documentation not basic enough. For one example, the 20 analog pins and 20 digital pins have labels but not any information explaining what they mean or how to read or write to each one in the code. Since the goal is to get more people using these and contribute to watershed data, even a…[Read more]
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matt replied to the topic HCSR04 & Sw5 in the forum Mayfly Data Logger 3 years, 4 months ago
I am trying to use the HC – SR04 with the board and have some similar questions. To clarify, are you saying that sensor can actually run fine at 3.3V? I hooked it up to the Sw5 pin and found code that says to power that at 5V write D22 high. Echo and Trig are hooked up to digital pins directly. Are you saying the return voltage from the echo pin…[Read more]
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matt became a registered member 3 years, 4 months ago
