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Tuya Inc.
Template:Stub Tuya Inc. is an IoT platform developer and provider from China. It started out with devices built on ESP8266 and ESP32 chips but switched to it's own line of chips to prevent users from installing custom firmware and by this disconnecting the devices from their (allegedly Chinese state controlled) cloud. Tuya's technology is used in many devices from cheap dollar store electronics to pricey designer lamps, their chip line is designed to be drop in pin compatible to ESP chips but using a different API. Most Tuya equipped devices nowadays can not be connected to WiFi without registering to the cloud first. It is often not visible from the product description that Tuya components are used, as customers of the platform can rebrand to the Smart Life cloud connecting app and only inspecting the chips gives it away.
Links
Tuya Inc. in the English Wikipedia
Libretiny - arduino compatible open source firmware (mainly) for Tuya chips