Components

Concept	Description	Links
PCB	Official FreeDS	Contact with @amcalo by Telegram
PCB	Latvia Assembly	Tindie
PCB	Low Cost Assembly (Max. 3A, 690W)	AliExpress
PSU	HLK-2M05	AliExpress
ESP32	Heltec - WiFi Kit 32	AliExpress
ESP-01	ESP-01 & USB Adapter	AliExpress
Connector	Strip PCB JST 2.54mm	AliExpress
Triac	BTA26-600B	AliExpress
Resistor	Metal Film Resistor - 1/4W - 1%	AliExpress
Fuse holder	Fuse holder 5x20mm	AliExpress
Fuse holder	Fuse holder 5x20mm	AliExpress
Fuse	Tube Fuse - 5x20mm	AliExpress
AC Connector	KF1000-4P - 300V 25A	AliExpress
IC socket	IC DIP de 6 pines	AliExpress
Optocoupler	MOC3041	AliExpress
Heat Sink	Aluminum Heat Sink - 40x40x11mm	AliExpress
Potentiometer	PT10-10K	AliExpress
Fan	ONEBSTR - 30x30x10mm	AliExpress
Fan	Hay-Kea - 30x30x10mm	AliExpress
Push Button	DS-402	AliExpress
Box	Box for Sonoff Basic (IP66)	AliExpress
RS485	TTL to RS485	AliExpress
Meter	Tomzn DDS238	AliExpress
Meter	Eastron SDM120	AliExpress
Meter	Eastron SDM230	AliExpress

Notes

• To choose the Amps of the fuse, follow the formula I = P / V and choose the Amps commercial slightly higher than that given by the calculation. For example, in a 230V installation and an electric boiler from 2.000W: I = 2000/230 = 8.69A, in this case we will choose a 10A fuse.