I looked at the list on https://thingino.com/ , and one of the cheapest cameras supported by thingino is Wansview Q5.
I'm NOT exactly sure on the exact version, because 2 different versions exist on Amazon, 3MP/2019 and 5MP/2024, in 2 colors each, but the older 3MP version is available for under $20.00 USD with FBA:
The 5MP version is not yet supported! it's identical to the Cinnado D1 5MP, and in addition to the better sensor (and dual band wifi!) they use the next generation Ingenic processors. Work in progress!
Generally the cheapest fro Amazom is by Cinnado. I have a video on installing it my channel as well. I've bought this model for as low as $9.50 shipped. https://www.youtube.com/watch?v=phqR49t75Ak
Cool! It looks like the Wansview Q5 has a similar SoC/camera/wireless setup as the Wansview W7, which as an installer guide on the Thingino wiki [1]. I wonder if that same installation process (but with the q5 firmware) would work. For $16 I'm inclined to try it out.
wyze doorbell v1 is very cheap refurb on ebay and has an actual 4 megapixel selsor they run at 1080p for no particular reason in their firmware. It's 4 megapixel when you run Thingino!
Thingino is a full replacement firmware for Ingenic-based ip cameras. While we have some overlap with OpenIPC it's fair to say that our missions are quite different. I don't consider us competing projects, they even use some of our code (and possibly vice-versa) in their firmware.
I'm NOT exactly sure on the exact version, because 2 different versions exist on Amazon, 3MP/2019 and 5MP/2024, in 2 colors each, but the older 3MP version is available for under $20.00 USD with FBA:
https://www.amazon.com/stores/Wansview/page/1E1F86AB-C01A-45...
https://www.amazon.com/dp/B07QKXM2D3 — $16.14 FBA for black 3MP Q5 Wansview
https://www.amazon.com/dp/B07QKWPT8J — $19.78 FBA for white 3MP Q5 Wansview
It's also been on sale at $9.99 on Woot a few months ago, but sold out.
https://electronics.woot.com/offers/wansview-2k-ip-security-...
EDIT: looks like the cheapest one in the US is actually Cinnado D1 2k, it's under $14.99 on Amazon.
https://github.com/wltechblog/thingino-installers/tree/main/...
https://www.amazon.com/dp/B0CBBT5RMP — ≤$14.99 FBA for Cinnado D1