Energy Meter Pulse Counter

DIN rail box and sensor case for the pulse counter for energy meter.

Box and sensor case printed from PETG, any standard profile will be good enough. DIN clips are glued to the case.

Device is designed to count the LED pulses from the standard home energy meter and store measured values online on Thinkspeak.com. You can monitor the actual power consuption or some defined intervals. Depending on the energy meter, one blink of the LED correspond to some power consumtion (the ratio is usually shown on the meter). By putting a photo transistor to the LED you can simply measure the blink counts and send those value to your preffered server or cloud. I am using the Thinkspeak.com server as it easy allows to create charts and has simple API.

For anyone interested the circuit schema in Fritzing including PCB attached. Also attached Arduino IDE code for the controller. Controller used is ESP32 because it is dual core. The application is wrote for two cores because of need of uninterupt