Home ventilation (automation)

[TrDA-hab]

Home ventilation (automation).

How I use this project in my city apartment:

• I have a main exhaust ventilation and it is automatically controlled by smart home sensors (Sonoff D1).
• every 6 ... 9 months I need to clean (maintain) the main exhaust ventilation.
• and there is a backup exhaust ventilation which is operated manually.
• the main and backup exhaust ventilation must not interfere with each other (must not be able to work simultaneously).
• main and backup exhaust ventilation are located in different rooms (this is important).
• I had to do this automation.

1. RobotDyn AC Light Dimmer.

• this only works if your AC motor is dimmable.
• it hums a lot when running (low frequency hum).
• this is unacceptable (work stopped) - see note below.

2. Sonoff D1 Dimmer.

• this only works if your AC motor is dimmable.
• it works very well (almost).

Video of the driver's work:

• https://youtu.be/S4nMcrPoYII

More about using PZEM-004:

• Tasmota PZEM-004
• about using PZEM-004

How to use it:

1. Run commands in the console for ESP-01S (remove comments first):
   Rule1
ON Tele-ENERGY#Current>0.5 DO publish cmnd/Motor-1/Power1 0 ENDON // if motor#2 is ON, then turn OFF motor#1
   ON Tele-ENERGY#Current<0.5 DO Backlog publish cmnd/Motor-1/Power1 1; publish cmnd/Motor-1/Dimmer 25 ENDON // if motor # 2 is OFF, then turn on motor#1 and set motor#1 dimming to 25%
   Rule1 1 // Enable Rule1

   Rule 5 // Now the MQTT message will be sent once and only once as long as the condition (!!!) is met. It is ideal for turning on / off the on / off of the exhaust fan depending on external conditions.
   https://tasmota.github.io/docs/Rules/#usage-of-one-shot-once

2. Run commands in the console for Sonoff D1 (remove comments first):
   Rule1
ON system#boot DO Backlog Power1 0; delay 10; Power1 1; Dimmer 25 ENDON //turn on motor#2 and set motor#2 dimming to 25%
   Rule1 1 // Enable Rule1

   Rule2
ON Dimmer#State>80 DO Dimmer 25 ENDON //turn on motor#2 and set motor#2 dimming to 25% (note(!) - see below.)
   Rule2 1 // Enable Rule2

Note:

• Sonoff D1 has problems on a regular basis and sets the dimming to 100% (it's very loud).
• to treat problems with Sonoff D1 and you need Rule2.

UPD#1:

If you’re having “ghost switching” events:

1. Pairing a RF remote with D1 could stop them.
2. Or remove from the board R6 R7 R8 R9 + R11 R12 R13 R14.
   
3. Or remove U1 + U2 from the board.
   

Best regards,
TrDA