PCB layout and design for IOT project


Thank you for your interest in my project.

I'm looking to develop a 220v wifi realy board for IOT, this module will be programmed to control light switches and make them controllable through the smartphone.

This module should be as small as possible (~50mm x 50mm), as it should fit inside the wall behind switches.

Looking for hardware engineer who can contribute to this project, advise and help creating this module small as possible, safe to use and reliable.

the board should have the following features:

- Based on esp8266

- Operated by direct input of 110V-240v.

- 2 10A relays with derived NO and NC contacts (110v-240v)

- 2 BUTTON inputs - here we connect the on / off switches

- 2 SENSOR inputs - we connect sensors (Temp, Humidity, etc.)

- 1 ADC measurement input (e.g. to connect light intensity sensor)

- 1 CFG button to enable the module into the configuration mode

- 1 indication led

- Headers for 3.3v, GND, TX, RX

- Enclosure case design (for 3D printing) - 50mm x 50mm x 25mm.

Some files attached for reference in similar projects.

See also for reference:

[url removed, login to view]

[url removed, login to view]

Another great example for reference is Sonoff dual:

- Pins for setting flashing and reset (using jumper)

Skills: Circuit Design, Electrical Engineering, Electronics, Microcontroller, PCB Layout

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About the Employer:
( 16 reviews ) Tel Aviv, Israel

Project ID: #15942193

Awarded to:


hello sir/ma'am I have 4-year experience in PCB layout design(flex, multilayer). Its an easy task for me because I am working on Home Automation products from last 2 years. and 1year experience in CAD design(enclosu More

$100 USD in 5 days
(4 Reviews)

25 freelancers are bidding on average $171 for this job


hello, Client I have experience in circuit design, PCB design, firmware and embedded software, real-time control, embedded design, Electronics design and PCB artwork. .I have an experience in PCB design and IoT. I w More

$222 USD in 3 days
(33 Reviews)

Hello I have experience in designing electronics circuits and can make your project. I will make your project practically on breadboard and will provide you circuit, code and PCB design. I can also manage online datab More

$300 USD in 15 days
(23 Reviews)
$200 USD in 3 days
(46 Reviews)

Hi sir I have 5 year experience of hardware design and pcb design field I have done already home automation projects using controller, WiFi, relay It's switch behind small module 50*50mm 2gang Thank you

$200 USD in 10 days
(39 Reviews)
$200 USD in 3 days
(18 Reviews)

Dear Sir or Madam I readed your proposal and I can make your job perfectly. I'm a proactive, innovative and very responsible person that enjoys acquiring new knowledge and experience and working with challenging More

$200 USD in 3 days
(5 Reviews)

Hi there, This is Ushan from Rational-X. I have done many ESP8266 and ESP32 based projects. So I believes I can give you a great service with my experience. You can check my reviews. I can design this PCB to use More

$230 USD in 10 days
(4 Reviews)
$147 USD in 3 days
(4 Reviews)

Hi, This project is a very appealing to me. I have a lot of experience in design of IoT product using esp8266 wifi module and Raspberry PI. You can see the similar project in my portfolio. If you want, I can share More

$155 USD in 3 days
(5 Reviews)
$80 USD in 3 days
(7 Reviews)

My self jaydeep singh, I am interested to work on your project, i am PCB expert in signaling PCB, I Can revise and advise all Application with new schematic and BOM, Please hire me on your team, i will impress you w More

$55 USD in 7 days
(2 Reviews)

Hi, I have experience with arduino, electronics, developing schematic and developing PCB layout. I worked on projects like a smartHome systems (smartSwitch, smartSocket, smartTemperature, smartWindow, smartDoor, smart More

$300 USD in 5 days
(2 Reviews)

I am sure that I am the ideal one for this project, I worked on project that is very likely to yours and made a prototype of it (both Electronic and 3D printed Cover) so I know all the problems that might occur in the More

$222 USD in 2 days
(2 Reviews)
$70 USD in 10 days
(1 Review)

I have experience in PCB design for 5 years. I design many board from MCU, FPGA, module GSM, Wifi, Bluetooth, some standard interfaces I2C, SPI ... and differential pair signal. I also usually work with PCB multi layer More

$77 USD in 5 days
(0 Reviews)

I have quite experience with power boards and their interface with IOT i can layout such board as i have designed many such boards from aspect of mecanical fitting and isolation consideration. Relevant Skills and Ex More

$111 USD in 3 days
(0 Reviews)

Hi. Should be interesting project. I have experience with producing of pcbs for nuclear physics application, for robots and other devices. Have experience with arduino and atmega itself, ESP just started, but looks not More

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Hi i hope you doing good.i just across your post. i would like to spend time with [url removed, login to view] call me when you are free. best, Tamilharasan

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I have made the same project so let's discuss it more in msg. I have made triac driver circuit for ac and dc load. Relevant Skills and Experience I have made 230v ac load circuit using bluetooth, wifi , temperature se More

$77 USD in 10 days
(0 Reviews)

I've made many of this boards, and also made some improvements on them! Please check this link [url removed, login to view]

$155 USD in 3 days
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