Greenway

Alexa Integration   Circuit Design We made an EVSE from parts on Banggood & Aliexpress mostly 16A 3.7 kW EV charging controller board + Type 1 EV  Current Sensor This is the key component for controlling charge level and auto shut off at the end of the charge. Probably saves a wee bit of energy with the power to the EVSE disconected in the off state also. Irms = emon1.calcIrms( 1480 ); // Calculate Irms only Kw = (Irms * 230.0 ) / 1000.0 ; float hours = (millis() - lastMillis) / ( 1000.0 * 3600.0 ) ; TotalChargeHours += hours; lastMillis = millis(); //CALC KWH if ( abs (Kw) > 0.1 ) KWh += (Kw * hours); Note: You must add a suitable burden resistor if one is not on the CT board already or the high voltage will damage the Arduino. The one shown has a burden resistor. PCB size 30.0mm X 24.0mm X 1.6mm Compatible interfaces 2.54 3-pin interface and 4-pin Grove interface Transformation coefficient 1000:1 Input current 0 - 5 A Output current 0 - 5 mA Sa

  This is a rough break down of materials costs NZ$28 1 X 60 litre Sistema box NZ$30 3 X 7500CPM main fans NZ$20 4 X 6500RPM booster fans NZ$3.50 4 X Fan speed controllers NZ$30 1 X 30 Amp PSU NZ$104 5 X diffusers with 3M of duct and Y junction NZ$21 4 X 150mm 3M ducts NZ$14 2 X 150mm 1M ducts NZ$1.00 12 X 150mm PVC flower pots NZ$15 6 X 6mm Corroplast sheet 900 X 1200 NZ$ 50 Arduinos and breakouts for project NZ$!00 Wire plugs sockets misc electrical NZ$60 New tools NZ$150 Tape screws wood sundry hardware Hot glue sticks NZ$30 2 X Sitema filer boxes NZ$12 2 X Foam exercise mats NZ$30 PC Servos NZ$100 Experiments breakages re-work Total NZ$1,510

  Hubitat allows development of custom drivers in Groovy. Its pretty easy to learn and the Hubitat framework allows connection and management of devices not supported by Hubitat officially like all your home-brew Arduino devices. You can also create custom applications to extend the capabilities of the devices. e.g Calculate dew point app:1153 2020-09-04 22:39:02.775 info Rho = 1.2405 kg/m3 app:1153 2020-09-04 22:39:02.771 info outsidetemp = 11.1 °C app:1153 2020-09-04 22:39:02.767 info Pressure = 100.8 Kpa app:1153 2020-09-04 22:39:02.763 info Absolute Humidity = 125.0 kg/m3 app:1153 2020-09-04 22:39:02.759 info Dew point temperature = 3.5 °C Still haven't finished the absolute Humidity calculation Credit to Bruce Ravenel for the original app code I based this on definition( name: "Calculate dew point", namespace: "hubitat", author: "Bruce Ravenel", description: "Calculate dew point", category: "Convenience"