HOME, FREE FOREVER

Your home alerts you and responds. No code, no soldering.

Local RF433 automations with a minimum 3-board kit: install the firmware from the browser, get one sensor recognized and create the first rule without code or soldering.

Minimum hardware around 5 EUR. The Home firmware is free, every limit is 8.
Starting from scratchOrder the kit · ~€5 I already have the boardFlash now, free

We will let you know when it is time to flash.

Ordered the kit? Leave your email: we will write when it arrives, with the step-by-step guide. No spam, just this.

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How it is built: 3 boards

One main board, two RF433 modules.

~5 EUR hardware
ESP32-S3 main board

ESP32-S3 main board

The black USB-C board you load with the free Home firmware.

RF433 module A

RF433 module A

One of the two small green modules in the RF kit.

RF433 module B

RF433 module B

The second green module: together they provide receiving and transmitting.

ESP32-S3 main board
2 RF433 modules
Plug into pin headers
Precautions in the videos
Main boardESP32-S3 USB-CTwo RF433 modulesPlug-in receiving and transmitting

Practical attention: they are not wires to connect: the two green modules plug into the black board in the correct direction. The videos show pin alignment and precautions before powering on.

3

boards to plug in

~5 EUR

minimum hardware

0

solder joints

Video

practical precautions

Start free

The first win is small, visible and technically low-risk.

First verify the minimum result: build the kit, get one sensor recognized and create a local rule.

Your first result

1

Trigger one sensor

Open a door, press an RF433 button or place the water sensor on two drops.

2

DIYLOGIC sees it

The local panel shows the received code and asks how you want to name that event.

3

Create the first rule

Write a simple logic: if this happens, then send an alert or activate a compatible output.

Free to really get started.

The Home firmware is free and complete for home use: sensors, outputs, timers, alerts and automations, every limit at 8. Start from a real test and only then decide whether you need PRO.

You do not touch the electrical system.

It is built with 3 boards: one main board and two RF433 modules that plug on top. You do not open sockets, run wires through walls or work inside electrical panels.

A test you can verify.

The first goal is concrete: get one sensor recognized, name it and create one local rule. If that works, the rest makes sense.

Clear limits from the start.

Rolling-code, modern gates, encrypted remotes and certified alarm systems stay out. DIYLOGIC does not copy or bypass them.

How it is built

One ESP32-S3 board and two RF433 modules to plug in by following the videos.

First automation

Save one sensor, give it a name and create a local rule from the browser.

What you can do

Door, water and PIR sensors, buttons, sirens, relays and compatible radio sockets.

6

supported languages

100%

local, no cloud

0 €

Home firmware

Open

code and protocol

“I thought you needed to know how to code. In one evening I got the door sensor recognized and created my first alert.”
From the community · beginner
“The fact that everything stays at home, with no account or cloud, is why I chose it over commercial hubs.”
From the community · privacy-minded user
“I connected cheap RF433 sensors to my PLC via Modbus: with DIYLOGIC it became the local bridge I was looking for.”
From the community · maker / PRO

Hundreds of makers are building local automations. Join in, ask for help and show what you built.

Join the community

Order the kit

The minimum kit is one ESP32-S3 board with two RF433 modules.

This is only about the physical build: main board, two plug-in modules, correct direction and aligned pins. No soldering iron, breadboard or electrical panel to open.

The 2 boards to order

total ~€5 · shipping not included
ESP32-S3 main boardOpen on AliExpress 2 plug-in RF433 modulesOpen on AliExpress

Shipping usually takes 2–4 weeks. Leave your email below: we will let you know when it is time to flash, with the step-by-step guide.

1 USB-C ESP32-S3 main board
2 RF433 modules to plug in
Pins aligned before powering on
USB-C cable to connect the board
Chrome or Edge browser on a computer
DIYLOGIC Flasher app to load the firmware
Video with direction and precautions
DIYLOGIC webapp served by the board
Flash & Go

Flash the board right now.

Pick where you start from: we take you to the right path in one click. No code, no account.

Windows · Linux · macOS

Flash from the browser, in one click.

On Windows, Linux or Mac use Chrome or Edge: connect the board with a USB-C data cable and the install runs from the browser, with nothing to install.

You need a USB-C data cable, not just a charging one: it is the number-one reason the computer does not see the board. When in doubt use your phone’s cable or try another.

Open this page from a computer with Chrome or Edge to install from the browser. From Android, use the DIYLOGIC Flasher app via USB-C/OTG; iPhone cannot flash over USB.Open this page from a computer with Chrome or Edge to install from the browser. From Android, use the DIYLOGIC Flasher app via USB-C/OTG; iPhone cannot flash over USB.

Connect the board to the computer with a USB-C data cable and click: installation starts from the browser and shows progress. On Android, the correct path is the DIYLOGIC Flasher app via USB-C/OTG.

Your WiFi credentials stay private. The network name and password are sent straight from the browser to the board over the USB cable and saved only on the device. They never travel over the internet, are not sent to us or any third party, and are not shared with anyone.

After you pick the WiFi, the board connects and shows its IP address (e.g. http://192.168.1.42): tap “Visit device” to open the panel. If diylogic.local does not open, use that IP address in the browser. Note it down: it is the address of your DIYLOGIC on your home network.

Video

Visual guides, zero technical jargon.

Every guide follows the same principle: photos, colors, checklists and short steps. If you can plug in a phone charger, you can follow the path.

Start here~3 min

From the box to the first notification

The overview for absolute beginners: what you receive, how it goes together without soldering, how you install it from your phone and how the first alert reaches your smartphone. If you watch only one video, watch this one.

Watch the overview
In production~4 min

What you get and what you need

The 3 real boards in hand: which one is the main board, which are the two RF433 modules and — above all — which USB cable actually works (the number-one reason the first step goes wrong).

Guide coming soon
In production~6 min

Installazione, passo per passo

From a computer, open the site in Chrome or Edge and install from the browser. From Android, open the DIYLOGIC Flasher app and connect the board with USB-C/OTG. On iPhone, use DIYLOGIC after the board has already been flashed.

Guide coming soon
In production~5 min

Plugging in the two modules without fear

The two green modules sit on the black board the right way round. Orientation, pin alignment and what to check before powering on: slow, up close, no rush.

Guide coming soon
In production~5 min

Your first sensor and your first rule

Open a door or press a remote: DIYLOGIC sees the signal, you give it a name and create your first local rule without writing code. The win that proves it works.

Guide coming soon
In production~4 min

If something goes wrong: the most common problems

The computer does not see the board, diylogic.local will not open, the sensor is not recognised. The most common causes and how to fix them in a minute, no panic.

Guide coming soon
In production~5 min

A phone notification when a sensor trips

The concrete goal: when a sensor trips, an alert reaches your smartphone. How to link the notification to a rule, explained in plain words.

Guide coming soon
See the steps

How it works

Load. Connect. Done.

From a blank board to the first automation, the path is guided and visual. From a computer, install from the site with Chrome or Edge; from Android, use the DIYLOGIC Flasher app via USB-C/OTG; then open the local webapp at http://diylogic.local.

You need a USB-C data cable, not just a charging one: it is the number-one reason the computer does not see the board. When in doubt use your phone’s cable or try another.

Open this page from a computer with Chrome or Edge to install from the browser. From Android, use the DIYLOGIC Flasher app via USB-C/OTG; iPhone cannot flash over USB.Open this page from a computer with Chrome or Edge to install from the browser. From Android, use the DIYLOGIC Flasher app via USB-C/OTG; iPhone cannot flash over USB.

Connect the board to the computer with a USB-C data cable and click: installation starts from the browser and shows progress. On Android, the correct path is the DIYLOGIC Flasher app via USB-C/OTG.

Your WiFi credentials stay private. The network name and password are sent straight from the browser to the board over the USB cable and saved only on the device. They never travel over the internet, are not sent to us or any third party, and are not shared with anyone.

After you pick the WiFi, the board connects and shows its IP address (e.g. http://192.168.1.42): tap “Visit device” to open the panel. If diylogic.local does not open, use that IP address in the browser. Note it down: it is the address of your DIYLOGIC on your home network.

Already installed and set up your board?

Open your device's panel on your home network: it must be powered on and connected to your WiFi (first setup already done via the captive portal).

Open my DIYLOGIC diylogic.local

If the local name does not respond, use the IP address your router assigned to the board.

01

Prepare the 3 boards

The recommended path starts from one USB-C ESP32-S3 board and two small plug-in RF433 modules. The total cost of the minimum hardware stays around 5 EUR.

02

Installa il firmware dal percorso giusto

From a computer, use Chrome or Edge and install from the browser. From Android, use the DIYLOGIC Flasher app with a USB-C/OTG cable. iPhone cannot flash over USB: use DIYLOGIC after the board has already been flashed.

03

Plug in the two RF433 modules

The two modules must be inserted on the main board respecting direction and pin alignment. Do not force the plug-in: the practical precautions are shown in the videos.

04

Open the DIYLOGIC webapp

Power the board, open the DIYLOGIC network from your phone and choose your home WiFi. From then on, type http://diylogic.local in the browser; if the local name does not respond, use the IP assigned by the router.

05

Teach the first sensor

Open a door, press a remote or trigger a water sensor. DIYLOGIC detects the fixed-code RF433 signal and asks what name you want to give it.

Compatible devices

What you can do with devices that cost a few euros.

DIYLOGIC works with fixed-code RF433 devices: door, water and PIR sensors, buttons, sirens, lights, relays and compatible radio sockets.

Tap a card to open an AliExpress search for the indicated device.

Door or window contact

AliExpress

It alerts you if a door opens when you do not expect it.

Open on AliExpress

Water / flood sensor

AliExpress

Place it under a washing machine or sink: if it detects water, it can send an alert or trigger a compatible output.

Open on AliExpress

PIR motion sensor

AliExpress

It activates when someone passes by. Useful for corridors, garages and service lights.

Open on AliExpress

Smoke detector

AliExpress

Adds a phone alert to compatible radio devices, without replacing certified systems.

Open on AliExpress

Radio remote

AliExpress

One button to start a scene, switch off a socket or trigger a local rule.

Open on AliExpress

Wireless button

AliExpress

Put it near the bed, entrance or garage: press it and DIYLOGIC runs the rule.

Open on AliExpress

Radio relay module

AliExpress

Can switch small loads on or off via a compatible RF command, without pulling a new wire.

Open on AliExpress

Radio socket

AliExpress

Switch off a light or compatible appliance with a local rule.

Open on AliExpress

Radio MOSFET module

AliExpress

For low-voltage lights and LED strips when using compatible fixed-code modules.

Open on AliExpress

Radio siren

AliExpress

Can sound when a local rule decides that a strong alert is needed.

Open on AliExpress

Phone dashboard

AliExpress

With compatible apps you can see states, buttons and values on a more convenient screen.

Open on AliExpress

Panels and workshops

AliExpress

For expert users, DIYLOGIC can act as a local bridge between low-cost sensors and technical supervision.

Open on AliExpress

Warning: rolling-code devices, including motorized gates, certified alarm systems and encrypted remotes, are not compatible by design.

From your country? DIYLOGIC uses the 433 MHz radio: it is the standard in Europe, much of Asia and many other countries. In North America several cheap devices use 315 MHz instead. Before buying, check that sensors and modules are 433 MHz and fixed code.

Real scenarios

Real things people build.

home

Flood protection

A water sensor detects a leak under the washing machine. DIYLOGIC can send you an alert and activate a siren or compatible radio output.

Estimated total cost: Home to start

garage

A door where wires cannot reach

Garage door, pedestrian gate, garden shed: bring the event onto the network without breaking walls or running conduits.

Estimated total cost: ~5 EUR hardware

lights

Light at sunset

At sunset, a radio socket switches on the driveway light. The rule stays local and does not depend on a cloud server.

Estimated total cost: ~5 EUR accessories

notifications

Smart doorbell

The doorbell rings while you are away. You receive an alert and can turn on a compatible light to simulate presence.

Estimated total cost: ~6 EUR accessories

school

Teaching bench

A class learns events, logic and automation with real sensors, a low-cost board and no programming language.

Estimated total cost: ~5 EUR per bench

safety

Small home monitor

Door and window sensors are read in real time. It is not a certified alarm system, but it can give you a useful view of the home.

Estimated total cost: ~20 EUR with multiple sensors

Vs alternatives

It costs little because it uses simple hardware.

DIYLOGIC does not try to sell you a closed hub: it takes low-cost fixed-code radio sensors and puts them into a guided, local and understandable path. It stays on at about 1 W: 8.76 kWh/year, about 2.60 EUR/year at 0.30 EUR/kWh.

Needs a soldering iron

DIYLOGICNo

Free solutionsOften no, but setup is needed

Commercial hubsProfessional installation

Requires programming knowledge

DIYLOGICNo

Free solutionsOften yes, or close to it

Commercial hubsRequires technical skill

Works without mandatory cloud

DIYLOGICYes

Free solutionsDepends on the setup

Commercial hubsDepends on the product

Fixed-code RF433

DIYLOGICReceives and transmits

Free solutionsVariable support

Commercial hubsNot always included

Local IF/THEN automations

DIYLOGICBuilt in

Free solutionsRequires combining multiple tools

Commercial hubsDepends on the system

Cost to start

DIYLOGIC~5 EUR hardware

Free solutionsHardware + hub + time

Commercial hubsUsually much higher

Always-on consumption

DIYLOGIC~1 W (8.76 kWh/year)

Free solutionsLinux mini PC: typical 6-15 W

Commercial hubsVariable

Annual energy cost

DIYLOGIC~2.60 EUR at 0.30 EUR/kWh

Free solutions~15.80-39.40 EUR

Commercial hubsDepends on the product

Annual saving

DIYLOGIC~13-37 EUR versus a Linux mini PC

Free solutions-

Commercial hubs-

Smartphone path

DIYLOGICGuided

Free solutionsNot always

Commercial hubsRare

Home free and PRO

Start free with Home. Move to PRO when you need it.

The Home firmware is free and has the local logic functions for home use, every limit at 8. PRO is a dedicated firmware that raises the counts to 32 and adds Modbus TCP for PLC/SCADA, advanced automations and all RF PRO nodes: after purchase you download and install the Pro binary.

01

Free and complete for the home

The Home firmware is free and includes the local logic functions for home use: sensors, compatible outputs, automations, timers, alerts and a browser panel, every limit at 8.

02

Local by design

Rules live on the board, not in a mandatory cloud service: they keep working offline.

03

Move to PRO when you need it

When you need Modbus for PLC/SCADA, counts at 32 and advanced automations, you install the Pro firmware: one-time license at the 5 EUR launch price.

Home — free

FREE FOREVER

0 EURHome firmware, free forever

The Home firmware is free, forever, and complete for home use: fixed-code RF433 sensors, radio outputs, IF/THEN automations, timers, alerts and a local panel from the browser. Every limit is 8. It works offline, with no cloud.

Download free
  • Local IF/THEN automations: up to 8
  • RF devices, outputs and clones: up to 8
  • Timers, alerts, registers and IREG: up to 8
  • 1 RF PRO receive node of your choice
  • Full local browser panel, offline
  • No mandatory cloud, no account

PRO

PREZZO DI LANCIO

9.90 EUR5 EURuna tantum

A dedicated firmware that raises every count to 32 and adds Modbus TCP for PLC/SCADA, advanced automations and all RF PRO nodes. After purchase you download and install the Pro binary: the features stay yours forever, offline, with no subscription. The first year of firmware updates and special content is included.

Launch price 5 EUR guaranteed until July 15, 2026. Then 9.90 EUR.

Buy PRO
  • Dedicated firmware: after purchase you download and install the Pro binary
  • Automations, timers, alerts and registers: up to 32
  • RF devices, outputs and clones: up to 32
  • Modbus TCP server (up to 8 masters) for PLC, SCADA, Home Assistant
  • All RF PRO nodes in reception, advanced actions (delays, register writes)
  • One-time: offline and forever. First year of updates included

The Home firmware is free and complete for home use. PRO is a separate, dedicated firmware with a one-time license; if you want to support development beyond the license, you can leave a free donation.

Support the project on Ko-fi

What is inside

Ready to go, nothing complex to configure.

Register map and documentation

Guides in progress, with a beta preview already available: installation, pinout, Modbus registers and first scenarios.

Guided updates

The path stays visual even when you update the device or change configuration.

Local by design

Automations live inside the device. Internet services are only accessories.

Advanced logic when needed

Timers, delays, multiple conditions, five notification channels. When you need them, they are there.

Frequently asked questions

Honest answers, no spin.

Does it work in my country? (433 or 315 MHz)

DIYLOGIC works on 433 MHz, the standard in Europe, much of Asia and many other countries. In North America several cheap devices use 315 MHz instead: before buying, check that sensors and modules are 433 MHz fixed code. You remain responsible for complying with local radio rules.

What if I buy the wrong sensor?

Start from the free Home firmware precisely to reduce this risk: you test the sensor without buying PRO. Look for fixed-code RF433 devices; if it uses rolling code, encryption or is meant for gates and certified alarm systems, it is not the right product.

Do I have to pay anything?

The Home firmware is free and includes the local logic functions for home use: sensors, outputs, timers, alerts and automations, every limit at 8. PRO is a dedicated firmware that raises the counts to 32 and adds Modbus TCP for PLC/SCADA and advanced automations: after purchase you download and install the Pro binary. One-time payment, 5 EUR launch price (then 9.90 EUR), no subscription; the features never expire. Updates and special content are included for the first year, then renewable (the PRO features stay yours either way).

What do I buy with PRO, and what expires after a year?

With PRO you unlock the PRO features on your device FOREVER: one-time, offline, with no subscription on the features. The first year of firmware updates and special content is included. After 12 months the PRO features stay yours and everything you already downloaded keeps working: only NEW updates and content stop, and you can re-enable them with an optional yearly renewal. Nothing shuts off and no device gets locked.

I know nothing about electronics. Can I really do it?

Yes. The path is designed exactly for this. You start from 3 ready boards: one main board and two RF433 modules to plug in carefully. You do not need to write code, solder or know electronics or lab tools.

Do I need a computer?

Not necessarily: from Android you can use the DIYLOGIC Flasher app with a USB-C/OTG cable. From a computer, use Chrome or Edge and install from the browser. After first boot, open DIYLOGIC at http://diylogic.local. On iPhone, use the webapp after the board has already been flashed.

How much does it cost in total?

The hardware: the 3 boards cost about 5 EUR in total. The Home firmware is free and includes the local logic functions for home use. PRO is an optional, dedicated firmware, one-time (5 EUR launch price, then 9.90 EUR), with no subscription.

Will there be paid features in the future?

PRO is the dedicated paid firmware: it raises the counts to 32 and adds Modbus TCP, advanced automations and all RF PRO nodes. You install it in place of the Home firmware, which stays free for home use.

Does it work with my gate remote?

Only if it is fixed-code RF433. Gates, certified alarm systems and modern remotes often use rolling code or encryption: DIYLOGIC does not copy or bypass them, for safety and correctness.

Can I use it as an alarm system?

No, it must not be presented or used as a certified alarm system. It can alert you, activate compatible radio sirens and create home automations, but it does not replace a certified security system.

Do I need internet?

Not for local rules. Internet is only needed for accessory features like external notifications, weather, updates and time sync. Local automations work offline anyway.

Is Modbus secure?

Modbus should only be used inside a trusted local network. Do not expose the Modbus port to the internet and do not use it as a security boundary.

Made a mistake? It can be fixed.

The most common problems have a simple solution, and none of them breaks the board. If you get stuck, the community lends a hand.

Ask for help
The “Install” button does nothing or says “not supported”

Browser flashing only works from a computer with Chrome or Edge. From Android, use the DIYLOGIC Flasher app via USB-C/OTG. From iPhone, use the webapp after the board has already been flashed.

The computer does not see the board

Almost always it is the USB cable: many cables only charge and do not carry data. Use your phone’s data cable or try another one, then reconnect the board.

http://diylogic.local will not open

Wait a minute after powering on and try again. If the name does not respond, use the IP address your router assigned to the board (you find it in the router app or page).

The sensor is not recognised

Move closer to the board, press several times and check the sensor is RF433 fixed code. Rolling-code and encrypted remotes are not compatible, by design.

The board seems dead or frozen

Unplug and reconnect the power. Your rules stay saved on the board: you lose nothing and nothing breaks.

For installers, PLC programmers and advanced makers

Technical detail, at the bottom for those who want it.

If you are an installer, PLC programmer or experienced maker, this is the next level. Everything above is the same thing, told in simpler words.

Open technical details

Local Modbus TCP

Standard server on port 502, readable by PLCs, SCADA and custom software on the LAN.

ESP32-S3 SuperMini

Reference pinout: RX on GPIO 4, TX on GPIO 5, I2C on GPIO 8 and 9.

Clear limits

All included and free: local automations, sensors, outputs, timers and alerts.

Compatible with Virtuino IOT

Philosophy

A smart home should remain your home.

DIYLOGIC starts from a simple choice: make home automation understandable, affordable and local. Cloud can add services, but it should not decide whether a light, sensor or alert can work.

Offline mode

The ecosystem DIYLOGIC hubs can keep working even without an internet connection.

In offline mode, local rules stay on the board: the sensor speaks, the device listens, the automation decides. Internet remains useful for updates, accessory services and external notifications, but it is not the foundation of the home.

Free from mandatory cloud

The heart of the system stays at home: local automations keep working even without internet. The network is useful when it adds value, not when it becomes a leash.

For everyone, everywhere, at minimal cost

Home automation logic should be within everyone’s reach, anywhere in the world. DIYLOGIC aims for a minimum kit of about 5 EUR and visual steps that lead to a real first result without a lab.

Independence and control

No closed hubs, no forced subscription, no automations that stop living if a remote service changes rules. Your home stays yours, understandable and modifiable.

Small, sober, sustainable

Using a low-power board and affordable RF433 sensors means giving simple devices new usefulness, avoiding waste and building only what is really needed.

Ethical value

The best technology does not force you to buy everything again: it helps you understand, reuse and choose.

That is why DIYLOGIC prefers small, affordable and documentable hardware, simple sensors and local automations. It is a technical choice, but also a cultural one: fewer closed boxes, fewer dependencies, less waste and more autonomy for people who learn by doing.

Plain words

The words you will meet, explained in a moment.

No surprise jargon. Here are the few terms you will see, said the way you would tell a friend.

Firmware

The program that makes the board work. “Installing the firmware” means copying DIYLOGIC into the little board, just once.

Flashing

È il modo tecnico di dire “installare il firmware”. Da computer lo fai dal browser; da Android lo fai con l’app DIYLOGIC Flasher via USB-C/OTG.

ESP32-S3

The name of the main board: a tiny computer costing a few euros, about the size of a couple of coins.

RF433

The 433 MHz radio that cheap sensors use to talk to the board, wirelessly.

Fixed code

Sensors that always send the same code: those are the compatible ones. Modern gates use “rolling code” and do not work.

Local panel (WebUI)

The screen you open from the browser to control everything. It lives inside the board, not on the internet.

Modbus TCP

A technical language to connect DIYLOGIC to professional systems. Beginners do not need it: it is a PRO feature for experts.

Talk to us

Have a question before you start?

Drop us a couple of lines or stop by the community: we are happy to answer, beginner questions included. No question is too simple.

Send us an emaillogicdiy@gmail.comJoin the communityDiscord, answers and help among enthusiasts

Start

Ready to start without skills?

Start right away: install the free Home firmware, plug in the modules and create your first local automation.

Order the kit · ~€5I already have the board
Order the kit I have the board