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From an email dialog:

Question:

I'm working through the programming training I went through the optional LED portions, since I already had all the parts. The RGB LED section uses PWM and I Googled to figure out which Mayfly pins had PWM, but I didn't understand the difference between the sets of PWM pins. Conceptually I get the difference between the 8 and 16 bit, but why are there separate timers. It worked by using D6, 7, and 11, but I don't know if I just got lucky.

Answer:

That's awesome that you got the optional LED portion of the LearnEnviroDIY tutorial working with the Mayfly.
Off the top of my head, I don't know which pins on the Mayfly work with PWM (since none of the sensors I use operate with PWM). Our original version of the tutorial required an Arduino Uno for episodes 1-2. Adding PWM pin info for the Mayfly would be a good request for an update to the tutorial, here: https://github.com/EnviroDIY/LearnEnviroDIY/issues (feel free to add other suggestions too!).

Since you got it to work, rather than finding the answer, I'll point you to how I would look.

• Basic pin info on the Mayfly: https://github.com/EnviroDIY/EnviroDIY_Mayfly_Logger#pin-out
• Detailed pin info on the Mayfly, via it's schematic, showing the pin mapping to the Atmega1284P MCU that it uses: https://github.com/EnviroDIY/EnviroDIY_Mayfly_Logger/blob/master/hardware/mayfly_v0p5b_schematic.png
• Atmega1284P datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/ATmega164A_PA-324A_PA-644A_PA-1284_P_Data-Sheet-40002070B.pdf
  • These are a bear to dig through, but from what I can tell any of the pins labeled "OCnx" (such as OC1A, OC1B, OSCA, etc.) can use PWM. From the Mayfly schematic, this correspond to D4-D7 and D11-12. Two other OCnx pins on the 1284P chip are used for other functions on the Mayfly and are not available to the user.

Given the work by @SRGDamia1 and @s-hicks2 to update the documentation and code in the EnviroDIY_Mayfly_Logger repository, it's time to start leveraging all that good material for this tutorial!

To Episode 1 :

• Into Lesson 0, link to Mayfly hardware sections of the main ReadMe, https://github.com/EnviroDIY/EnviroDIY_Mayfly_Logger
• Move "Get to know the Mayfly" section on clock battery & SD from Episode 5 to Episode 1
• Add Example sketches in this order:
  • blink_demo_1
  • blink_demo_2

To Episode 2 :

• initial_demo_blink_temperature, requires understanding of libraries

To Episode 6

• battery_measurement
• simple_file_example, which logs battery voltage to the SD card

Presently only discusses Atom for PlatformIO.
Add advice and info for how to install and work with VSCode, to support both.

Manually add the /carpentries/styles repository as a remote, following step 9 at:
http://carpentries.github.io/lesson-example/setup.html
and as explained at http://carpentries.github.io/lesson-example/02-tooling/index.html

Episode 1 links to update:

• SparkFun Inventor's Kit Experiment Guide - v4.1
• SparkFun Inventor's Kit Guidebook - v4.1

I'll add others as I find them

A know issue for PlatformIO is that "Smart Code Linter is disabled for Arduino files".
https://docs.platformio.org/en/latest/ide/atom.html#known-issues

We should consider if we should adopt the workarounds.

Presently for Uno and clones.
Make to work with either Uno or Mayfly, by giving a side note for how pins on Uno map to pins on Mayfly.

Especially since ModularSensors v0.19.3: Bug fix and example re-working on Jan. 15, 2019.

such as MiniMap and others

including both platformio.ini file changers and also upgrading station code sketches from one version to another.

Here's some example content pasted from a recent email.

Upgrade by changing your PlatformIO.ini file

• Under lib_deps = , comment out EnviroDIY_ModularSensors@=0.21.2, and replace with any of the below
  • EnviroDIY_ModularSensors@=0.21.4​ // for any of the official releases at https://github.com/EnviroDIY/ModularSensors/releases​, or
  • https://github.com/EnviroDIY/ModularSensors.git#​develop // to point to the head of any branch, or
  • https://github.com/EnviroDIY/ModularSensors.git#​bf667dc33ef7e48a38fd55a9adc9579331c344c4 // to point to any specific commit
• For documentation on the syntax options, see https://docs.platformio.org/en/latest/userguide/lib/cmd_install.html#platformio-lib-install

I need to update Part 2 to work seamlessly with the latest version of ModularSensors, which is presently v0.24.1, but will likely be updated to v0.25.0 before we begin. The online tutorial was last updated in May 2019 for v0.21.3, and the changes are substantial.

See https://github.com/EnviroDIY/ModularSensors/releases