Analog input

[RepRapLtd]

Hi!

This looks like a really useful project. Brilliant!

I have a feature request, if that's all right: add a single analogue input to the ESP-32 accessible from the outside. Ideally this would be a 3-way connector with GND, VDD3V3 and (say) a connection to GPIO34. This would allow measuring and monitoring of things like light levels and temperatures. The latter would be really useful if the device were to be used, for example, to control heating in buildings. It could not only turn the heaters on and off; it could also then transmit back the room temperature. This would allow central systems access to both monitoring and control.

Adrian Bowyer
https://reprapltd.com

[slaesh]

Hey Adrian,

thanks for your feedback! :) 😇

Yeah we thought about that too.
But currently the power is not galvanic isolated and so we can't (don't want to) trace any "harmless looking" signals to the outside with the risk of touch the mains AC voltage ⚡ ^^
But we have this in mind will try to find a cool way of doing so, maybe in a future version. let's first see how the campaign goes and what is possible :)

BR, Sascha ✌️

[RepRapLtd]

Glad to hear you thought of it too! I guess it would need an opto-isolator like the ACPL-C87B, though then the sensor would need an independent power supply. I don't know if anyone makes an analogue opto isolator chip with a tiny solar panel underneath that can be mounted on top of a standard surface mount LED - that would be rather useful.

However, looking at the PCB I can see that understandably there's not a lot of room...

Good luck with the project! I shall definitely buy when the Crowdsupply page goes live.

Best wishes
Adrian