I was searching for a teardown of this device to checkout what hardware is used and didn’t find much, so I opened one of my devices and made following pictures.
It can be opened easely in a bench vise without damaging anything. It’s glued only.
got here a PlugMG3 V0.0.2:
ESP-Shelly C38F:
All Gen3 devices are based on Shelly-C3F8 MCU. The Shelly-C38F are fully compatible with ESP32-C3, but with build-in more Flash and RAM which allow to save space into devices and give us possibility to add more features.
https://community.shelly.cloud/topic/661-shelly-c3f8-specification/
BL0942:
BL0942 is a built-in clock calibration-free energy metering IC, which is suitable for single-phase multi-function electricity meters, smart sockets, smart home appliances and other applications, with more cost-efficient solution.
https://www.belling.com.cn/media/file_object/bel_product/BL0942/datasheet/BL0942_V1.06_en.pdf
BP2522:
The BP2522X is an ultra-low standby power non-isolated buck converter for constant output voltage application. The device is suitable for 85Vac~265Vac universal input non-isolated auxiliary power supply.
The BP2522X integrates a high voltage power MOSFET. With the proprietary output voltage and current control technique, it can get excellent CV regulation. The chip integrates smart high voltage startup and power supply circuit, so the auxiliary winding can be eliminated.
The BP2522X utilizes PWM & PFM multiple mode control, powering VCC by output voltage, which contribute to very low standby power, high efficiency, excellent dynamic response and minimized audible noise.
https://datasheet4u.com/pdf/1551575/BP2522X.pdf
S47.BfA2:
Perhaps a DC/DC PWM/PFM st-up voltage converter IC or similar.