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You are here: Home » ESP32 IoT Setup For Concealed Conduit Wiring

By Abhishek Ghosh July 11, 2021 7:23 pm Updated on July 11, 2021

ESP32 IoT Setup For Concealed Conduit Wiring

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In this article, we will discuss the electrical wiring required to set up a DIY IoT smart control system to control 8 3W spotlights, one ceiling fan and one Indian jhar bati (chandelier lamp). We have a total 8 number of connections where 8 out of 8 are dimmable and we are using the traditional piano/rocker switches. We have discussed about interfacing the piano/rocker switches with ESP32.
We need manual control as well as digital control. You’ll not get retrofit 6 switch controller (not 8) with dimmer function from Anchor (Panasonic). Anchor has this one :

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https://lsin.panasonic.com/roma-retrofit

The cost of Anchor’s retrofit 6 switch controller cost extremely high. Investing more than $100 just for automation is not everyone’s cup of tea. Within $30 you can have all the hardware features with ESP32. Yes, you can not have a software interface like that of Anchor simply because you are not spending behind the software. I would suggest opting for a branded solution for the outdoor lights, high load appliances and bedroom. The rest of the rooms do not need fine quality app/software, just a DIY solution will do the job. Anchor (Panasonic) is not sponsoring this article. Anchor products are widely available in many countries and their products are decent.

Use 1.5mm2 wire for the whole work. 1.5mm2 is more than enough for the job. 1.5mm2 cable is rated at 14.5 amps continuous under typical installation conditions. At 240 volts, that is a capability of 3.5 kilowatts. 2.5mm2 cable is rated at 20 amps. It is fatter, heavier, stiffer and more expensive.

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Use separate connections for a pair of a spotlight. For a total of 8 spotlights, you’ll need 4 switches. The connection of the ceiling fan and chandelier is via separate pair of wires and switches. So, you are having a total of 4 pairs of wires for the spotlights, 2 pairs of wires for the fan and chandelier and one pair of wires will come from the mains passing via a 6A MCB. You’ll get decent chandeliers within a $200 budget with LED lights. Total wattage will not cross 100W. So, your total wattage is not more than 300W. You’ll lay the conduits and boxes/brackets within the RCC moulding.

The main part is the switch/connection boxes. You need at least eight modular connection boxes for the spotlights, ceiling fan and chandelier’s rocker/piano switches. Both the ceiling fan and chandelier will have dimmers. A separate eight modular connection box will be connected with the above setup. As the box will need a faceplate, it is better to install it at an “out of the sight” spot. If your wall is a 20-30 inch insulated wall, you may place the box on the wall of a window. Inside this separate eight modular connection box, you will place the ESP32, PCB with relays for making the total thing “smart’.

ESP32 IoT Setup For Concealed Conduit Wiring

The other electrical connections of the room, such as for air-conditioner and power outlets should be wired separately with their own MCBs. If you configure your room in this way, the risk from DIY work (with Made in China products) will get eliminated.

You can use our code to use IBM Watson IoT based method or some other people’s code, like this one :

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https://www.instructables.com/ESP32-WiFi-Bluetooth-Home-Automation-With-Manual-S/

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Abhishek Ghosh

About Abhishek Ghosh

Abhishek Ghosh is a Businessman, Surgeon, Author and Blogger. You can keep touch with him on Twitter - @AbhishekCTRL.

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About This Article

Cite this article as: Abhishek Ghosh, "ESP32 IoT Setup For Concealed Conduit Wiring," in The Customize Windows, July 11, 2021, February 1, 2023, https://thecustomizewindows.com/2021/07/esp32-iot-setup-for-concealed-conduit-wiring/.

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