Pin numbers are not port numbers

In a blog post last month I confidently asserted that the output pins on an ESP8266 didn’t have enough “oomph” to drive the neopixels on an Adafruit 8x8 panel. I’m sure you remember the post.

Anyhoo, it turns out that the post (rather presciently titled “Making Mistakes”) was wrong. What I should have written is that if you use the wrong pin on your device it won’t work. Just because a pin is labelled D1 doesn’t mean that it is connected to GPIO1, as the diagram above makes very clear.

So now I can use an ESP8266 to drive my panel, which is nice.