ESP32 Greenhouse Monitor
DHT22 + soil moisture sensor streaming to MQTT broker, visualised in a Node-RED dashboard. Built after reading the millis() timing post — no delays anywhere in the sketch.
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Real firmware built by LogicFrenzy readers. From greenhouse monitors to industrial Modbus loggers — see what the community ships, and add your own.
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Modbus RS-485 Data Logger
Reads holding registers from a Schneider PM5000 power meter every 5 seconds using an ESP32 and MAX485 module. Logs to SD card and pushes to InfluxDB over Wi-Fi.
FreeRTOS Dual-Core Sensor Hub
Core 0 handles Wi-Fi and MQTT, Core 1 reads 4 analog sensors at 100 Hz. Tasks communicate via FreeRTOS queues — zero data loss under heavy broker load.
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