Tag - UART
ESP32 energy metering with HLW8032, BL0942, and ESPHome is not just about reading voltage, current, power, and energy. This article explains how to design the UART boundary, sampling cadence, Wi-Fi behavior, calibration, diagnostics, and Home Assistant entities as one stable data path.
Blog, Embedded System Development, IoT Tools and Platforms , April 30, 2026 , BL0942, Device Reliability, Energy Metering, Energy Monitoring, ESP32, ESPHome, HLW8032, Home Assistant, UART
Building an ESP32 Modbus-RTU bridge is not mainly about connecting a MAX485 board. The real issues are RS485 electrical design, UART ownership, polling cadence, and the operational boundaries of ESPHome modbus_controller. This article explains how to bridge PLC data into ESPHome and Home Assistant more reliably.
Blog, IoT Protocols and Interoperability , March 24, 2026 , Edge Gateway, ESP32, ESPHome, Home Assistant, Industrial Bridge, IoT integration, Modbus RTU, PLC, RS485, UART