Best Way to Feed ESP32 + CT Sensor Data into OpenEnergyMonitor?

Hardware
1

Has anyone here successfully sent CT/ESP32-based energy readings into EmonCMS or OpenEnergyMonitor dashboards? I found a clear tutorial on interfacing the ACS712 current sensor with Arduino (useful for CT/low-cost current measurement)nhttps://www.theengineeringprojects.com/2017/05/dc-current-sensor-acs712-arduino.html

I’ve also seen community notes about current-sensor libraries and Proteus simulations (handy for testing), and Arduino/Raspberry Pi threads where people push CT readings to MQTT or ThingSpeak before forwarding to EmonCMS curious whether folks here recommend direct MQTT→EmonCMS or routing via Node-RED for formatting/calibration. Any practical tips on calibration, sampling rate, or protecting sensors from mains noise?

2

Direct via MQTT works well (on a local system - emoncms.org requires the HTTPS interface). Any valid JSON with a key:value pair will work.

Just publish the full JSON to an emon/nodename topic and emoncms will pick it up.