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Hi, I'm trying to connect up a Lolin D32 to the SparkFun ESP32 DMX to LED Shield.

Using the schematics of both the shield and the Feather board, I've hooked up the power, ground, pin 21 and pin 17 in order to send DMX data.
However I'm getting no action on the other end.

When i crudely connect up a couple of LEDs to test the signal coming out of the DMX connector on the shield i see that Pin 2 is constantly high and Pin 3 never shows a signal.

I'm just not sure whether the board is broken, whether the connections I've made are incorrect, or whether it's a software issue.

I'm using the examples and library from here:

Any help?
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