Showing imported and exported power by red/green led flashing

[psubiaco]

Hi,
when you have a photovoltaic system, maybe you need in kitchen and laundry an indication of how much power is available from photovoltaic, before starting the dishwasher or washing machine.
The best solution is a display, but this is not always easy to install and connect.
My solution was to use the module Creasol DombusTH, that is very small and take the space for 1 module on the wall, integrating the following led/sensors/inputs/outputs:
* red led: used to show imported power (in kW: OFF = 0W, 1 flash = less than 1kW, 2 flashes = less than 2kW, ...)
* green led: used to show exported power (OFF = 0W, 1 flash = exported power less than 1kW, 2 flashes: less than 2 kW, ...)
* white led: used to show ventilation status (0=OFF, 1=air renew , 2=dehumidifier ON, 3=renew+dehumidifier) and also will be ON in case of power outage (as emergency light)
* temperature sensor, always useful
* relative humdity sensor, always useful
* 4 I/O and 2 open-drain outputs, that I have connected to a buzzer that alert in case of too much power consumption from the grid (preventing disconnections), pushbutton to activate ventilation and finally a double button to activate/disactivate day alarm system

This is the configuration of DomBusTH installed in the kitchen, near the induction hob, so I can always know the electricity power status, getting a buzzer alert in case of overloads (so I have to reduce power on the induction hob).

The following video shows how led flashes to indicate the ventilation and power status.


DomBusTH can be connected to Domoticz by RS485/USB adapter, connected to a common 4 wires alarm cable, within 12V power supply and serial data, that interconnect all Dombus modules in the building.
In my house I've connected one DomBusTH for each room where I have to monitor temperature and humidity, as like as other modules to build a complete domotic network.