Are you creating an A0 pin for this? I think that would be the cleanest solution since it's really a separate pin. If you do, please don't use pin number 16 to represent it but perhaps 17 or higher 'cause some day we may want to add D16 (which is not a true gpio pin but is often referred to as such in the esp8266 world).
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Are you creating an A0 pin for this? I think that would be the cleanest solution since it's really a separate pin. If you do, please don't use pin number 16 to represent it but perhaps 17 or higher 'cause some day we may want to add D16 (which is not a true gpio pin but is often referred to as such in the esp8266 world).