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Asbjoern / ESPHome-Kamstrup-Radius

ESPHome component for the Kamstrup electricity meter supplied by Radius in Denmark
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Simple ESP circuit? #1

Closed MagnusErler closed 1 month ago

MagnusErler commented 1 month ago

Is it possible to just connect an ESP module to GND, VCC and DATA_OUT, or do I need a (complicated) circuit like this https://github.com/Asbjoern/Kamstrup-Radius-Interface/tree/master/pcb?

Asbjoern commented 1 month ago

If you power the esp module externally and don’t connect vcc. Then yes. There is not enough power supplied by the meter for the peak currents of the esp module. There is a risk of damaging the meter if you draw more current than allowed. That is why I have this circuit to limit the current drawn and a supercap for the peak currents.