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- PB3 (Pad 5): Relay Control. Will be driven high (logic level 1) when the light should be on and low when the light should be off.
- PB4 (Pad 6): PWM signal (can be converted to 0-10V with an additional circuit)
- PA5 (Pad 9): Network Status Indicator LED LED. **A transistor circuit is required to ensure that this pin is held high at startup. This pin assignment will be changing. See the note on the "PA5 Protection Circuit" page.
- PA6 (Pad 16): Button for factory reset (by driving this pin low for >5 seconds)
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