[rdsubhas]

Cool project! Just one thing: It says "ultra low" power.

But ultra low is not necessarily the same as battery powered, which itself doesn't necessarily mean coin-cell battery powered.

My experience with wifi modules I've built so far has been, they've all been "low" but not usually battery powerable.

I wish the README provides more info whether it's suitable for battery-powered operation, and if so how which.

[surajrmal]

Nothing with WiFi will ever be coin cell battery powered. But that doesn't mean it couldn't be battery powered for a year or longer with bigger batteries. Otherwise you'll need a different radio technology.

[happyopossum]

> Nothing with WiFi will ever be coin cell battery powered.

Well, except for all the coin cell operated matter over WiFi smart buttons / remotes / switches you can buy from just about anywhere…

[surajrmal]

None of those are using WiFi. Most use a different radio technology and require a hub to bridge the network.

[solid_fuel]

I think some do use regular wifi, especially the amazon ones, but with a button you have an advantage where you could just stay idle and off the network most of the time, and only connect to send an event when pressed.

[everforward]

That likely increases your latency by a fair bit. Most of my devices take a second-ish to connect, configure the WiFi stack and start sending data.

I’m not sure I’d want a full second of latency on button presses. I would have figured Amazon used BTLE to the Alexa and used it as a BT to WiFi gateway

[solid_fuel]

BTLE and/or their IoT mesh network (Sidewalk?) would be a good way to go too, but if it's just a button to reorder laundry detergent or something then I don't think even a 30 second delay would be a deal killer for most people.

[melastmohican]

I was happy to make it work at all :-) There is a guy on the internet who measures the power consumption of many mcus and concludes the nrf52840 is the best: https://www.youtube.com/watch?v=KE7bOYCYETM