The discussion focuses on the Tuya WiFi Energy Meter PM01_A002, specifically the CBS version with the BK7231N chip and HLW8112 power metering IC. The device, purchased from AliExpress, features a direct SPI connection between the HLW8112 and the CBU, without a TuyaMCU intermediary. The firmware is reported as unstable, with backup and restore operations causing incorrect measurements. It was discovered that power values are reported with a 1:5 ratio discrepancy. The thread aims to clarify confusion arising from mixed information about similar devices in other forums and provides detailed pinout and wiring information for the HLW8112 SPI interface on this specific model. Summary generated by the language model.
