Smart Home IoT Expert
p.kaczmarek2
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Rust on Embedded Online Conference on 16 July with 33 per cent discount for elektroda users Elektor Academy Pro is hosting a full-day online conference on 16 July on the use of the Rust programming language in embedded and...[Read more]
I've been recently experimenting with simple flashing code for BW16E (RTL8720DN AmebaD) board, in theory also working for any of RTL872xDx family. RTL8720DN is a WiFi (2.4GHz and 5GHz) and Bluetooth (LE 5.0) module that features dual core CPU using KM4 and KM0 cores. It can be bought for as low as 1$. Here I will show my experiences with...[Read more]
![[WBR3 RTL870CF] TruCool TC-1160 Portable Air Conditioner Teardown and OpenBeken Flash Questions](https://obrazki.elektroda.pl/1839393700_1752169530_thumb.jpg "[WBR3 RTL870CF] TruCool TC-1160 Portable Air Conditioner Teardown and OpenBeken Flash Questions")
This is the cheapest AC that was available on Amazon. When I saw it had Wi-Fi and was a Tuya device, I knew I had to at least tear it down. (Eyes and tie are aftermarket upgrades) Teardown: The teardown itself isn’t too difficult but you have to remove all the plastic panels to get access to the microcontroller. I recommend making sure the...[Read more]
. OpenBeken has long had integration of the LittleFS file system allowing files to be stored and managed directly in the microcontroller's Flash memory. This allows you to conveniently create device-specific configuration panels, such a panel itself is implemented in HTML and its communication with the firmware is done through a REST interface,...[Read more]
Recently it seems there has been a lot of cheap earwax remover otoscope devices popping up on amazon/aliexpress/tiktok shop similar to this: When powered on, the button will start flashing slowly, as well as the light for the camera will turn on. After a few seconds it will start its wifi network usually with an ssid like "Soulear-ae45b" where...[Read more]
. Here I will test the eWeLink LED light controlled wirelessly via the Zigbee protocol. I will pair it with Home Assistant and see what its integration with Zigbee2MQTT offers. I purchased the LED bulb, also incorrectly known as the 'LED bulb', from a Chinese portal with free shipping for around £20. After two weeks, I received such a box:...[Read more]
![[BL602] BL602 PTBLU-W WiFi Module Pinout and Specs in EARU EAKCB-EWE-M Circuit Breaker](https://obrazki.elektroda.pl/5083588700_1751735837_thumb.jpg "[BL602] BL602 PTBLU-W WiFi Module Pinout and Specs in EARU EAKCB-EWE-M Circuit Breaker")
Here's details and pinouts for the EARU model EAKCB-EWE-M circuit breaker, purchased from AliExpress in Jun 2025: There's 6 rivets holding the case; you can just drill them out and then the case opens easily. The circuit breaker is rated up to 63A; the relay is marked at 60A maximum. The rest of the construction looks very solid and easily...[Read more]
. Here I will show how to easily run an external Flash memory with any microcontroller based on software SPI. I will discuss here the operation and meaning of the different operations (read, write, erase) and implement them in code. The topic of using such memories seems interesting to me, to say the least, because it is very easy to get...[Read more]
. I would like to invite you to a presentation of the interior of an older Crown Japan radio alarm clock model CR-S9028, designated DIGITAL LED-Uhrenradio. The unit offers FM reception in the 88-108 MHz range and AM reception in the 540-1600 kHz range. It is equipped with an LED display showing the current time, an alarm clock function with...[Read more]
Sonoff R5 Scene Controller is a battery-powered 6-gang remote wall switch featuring three different button events (click, double or hold). It is usually paired with Sonoff Gateway, but here we will show you how you can pair it with ESP32 Tasmota device and use it with Home Assistant to create custom automations. Sonoff R5 Scene Controller...[Read more]
. A switch is a device that connects different equipment on a network and allows them to exchange data. A switch differs from a router in that it is used to network multiple devices, whereas a router also connects different networks. A switch is often used when you are short of ports on a router - it can be added to a network without additional...[Read more]
As proposed by @pkaczmarek2 I'll try to share some ideas for my OpenBeken IoT firmware extensions and features here, starting, "as requested" ;-) with the extended DS18(B)20 driver. The code is in PR #1627 I'll start with some information and screenshots, but I would be glad to get some feedback on more basic questions in the later part of...[Read more]
. "Vibe coding" is a term used to describe programming based entirely on code generated by artificial intelligence. The programmer then just briefly describes his requirements in natural language and the LLM (language model) translates this into code. Proponents of this method praise it because it allows results to be obtained quickly and...[Read more]
![[WIP] Della Mini Split TCWBRCU1 Wi-Fi Module Disassembly and Flashing Guide with OpenBeken](https://obrazki.elektroda.pl/4508584600_1747095580_thumb.jpg "[WIP] Della Mini Split TCWBRCU1 Wi-Fi Module Disassembly and Flashing Guide with OpenBeken")
Disclaimer: Welcome to this guide, which is a work in progress and may be updated or revised as new information becomes available. While the instructions aim to make the teardown and modification process straightforward and safe, I am not responsible for any damage to your equipment or injury to yourself or others . Disassembling or modifying...[Read more]
. Here is a short presentation of the interior and the procedure for changing the firmware of an external WiFi-controlled socket, model OR-SH-17405. The product shown here additionally offers voltage, current and power measurement and normally works with Tuya, but after uploading the new software it will be possible to run it 100% locally...[Read more]
. Hello, I recently had my energy meter replaced by Tauron. As it turned out, the new one has remote reading. Therefore, I became interested in the subject of integrating the meter value reading with the Home Assistant. Unfortunately, as it turned out, the model I had installed did not have wMBus support. All that was left, therefore, was...[Read more]
![[ZIGBEE] 20A Zigbee socket with energy metering (Tuya TS011F_plug_3)](https://obrazki.elektroda.pl/1000454900_1749493372_thumb.jpg "[ZIGBEE] 20A Zigbee socket with energy metering (Tuya TS011F_plug_3)")
Welcome, I bought my first Zigbee socket, taking advantage of the fact that there were promotions on Ali, it came out to about 10,50zł. Exactly at this seller: Today it came to me with the rest of the shpeju and I would not be myself if I did not start by taking it apart and see what is inside. And it is well... judge for yourself: - a protective...[Read more]
. Home Assistant is a popular, open source home automation system that allows the integration and personalisation of many different systems and series of devices. One simple but effective way to personalise the HA interface is to change the icons assigned to entities, such as switches, sensors or lights. Home Assistant uses icons from the...[Read more]
. More than a decade ago on "Elektroda" I saw a cool toy project for a child: I thought it was a pity that my children are already too big for such a toy. But time flies fast and in the meantime my grandson turned two. And I was reminded of that project. Most of the reasons for building and construction ideas are almost clones of the ideas...[Read more]
. Matter's M5-3C-80W three-channel wall switch allows direct or remote (via WiFi) control of three receivers and works with the eWeLink app, in addition to offering Matter protocol support. It is distinguished by three "clicking" buttons, which is a nice change from the ubiquitous touch solutions. The whole thing is available to buy for £80...[Read more]
. The ATLO-SW1-TUYA is another tiny (43x39x22 mm) relay module offering control of a single receiver via WiFi. It is mounted in a box and, in addition to WiFi, it can work with a classic bistable switch. Here I will show how to change its firmware to connect it to Home Assistant. The whole thing is available to buy for £30. I got this unit...[Read more]
. More than a decade ago on "Elektroda" I saw a cool toy project for a child: I thought it was a pity that my children are already too big for such a toy. But time flies fast and in the meantime my grandson turned two. And I was reminded of that project. Most of the reasons for building and construction ideas are almost clones of the ideas...[Read more]
Hello everyone! I come to you with a project that dragged on for me for almost 4 years - a tube amplifier, which was my school of tube electronics. During this time I made a lot of mistakes, learned a lot and today I can say with a clear conscience that "I already know something". 😊 Initially, this was to be a clone of the schematic-based...[Read more]
. Before publishing, I wondered if anyone else was interested in this topic. But maybe there is still a maniac for flashing lights :) . Illuminophony - a somewhat forgotten topic. The device has, in my opinion, undergone a backward evouluation and at the outset let me quote my colleague @Preskaler who wrote 20 years ago: The idea of illuminophony...[Read more]
Good morning. I wanted to introduce my next design which is a threading arm. The base of the machine is a 400 kg magnetic lifter ordered from a well-known Chinese portal for the sum of 330 PLN. . I bolted a flat bar to the top of the magnet with a welded 30 mm shaft. I then screwed linear bearings to the 80x80 profile on both sides and put...[Read more]
. Hi, As the summer season is approaching, I have decided to build a weather station (or rather a "motherboard" for it) to control the irrigation system and also to allow a quick view of current parameters such as temperature, humidity or pressure, with the possibility of extending the functionality. For a while I was looking for ready-made...[Read more]
Edit: 03-10-2025: I have corrected the circuit diagram for normalising the output signals, and refined the buffer (emitter secondary) which was causing some problems. Just for fun, I committed a function generator, sine, triangle and rectangle based on the AD9833 programmable generator (SPI). . . . The project uses a choice of Arduino UNO/...[Read more]
. Welcome. Some time ago I started my adventure with PLC programming. To start with, I found that Siemens LOGO! was sufficient. Creating a program in FBD language is quite transparent but, as you know, the created program must somehow affect reality. It is a good idea to test the written programme on a workbench in order to identify and repair...[Read more]
. Ot, Atari never made a 3.5" station for the 8-bit series. The XF 351 never got beyond the prototype stage. I thought I would change that ;) The choice fell on the XF551. I built the electronics based on a schematic from the net. New board in SMD drawn in DipTrace, ordered from JLCPCB. XF 551 schematic. . Plate. . The choice of drive from...[Read more]
A simple PWM (Pulse-Width Modulation) generator built on an ATtiny24/44/84 microcontroller, supplied with stabilised voltage Vcc=2.7-5.5V (2.4-5.5V if using the "A"/"V" version of the microcontroller). Its output produces a rectangular signal with a selected fixed frequency of 1.25/10/80 kHz and a filling adjustable in the range 0-100%, in...[Read more]
Good morning! With this year's lovely winter underway, I decided to create a Bartop slot machine. My main goal was the enclosure itself. It was intended to be as aesthetically pleasing on the inside as it was on the outside. Ultimately, the whole thing is supposed to be fun and evoke the nostalgia of my teenage years, when I was faced with...[Read more]
I bought a barometer. The seller said there was a mistake, not 50pln but 500pln it was supposed to be. He refunded the money. I bought another one - broken, it's sitting under the kitchen table waiting for a return label. I bought a third one - a new USSR, but it didn't survive transport.... So much for the basic question "why do this, isn't...[Read more]
Welcome, I've been building projects based on ESP32/8266 microcontrollers for a couple of years now. I played around with atmegas / Arduino at first, but once the aforementioned modules fell into my hands, I stayed with them. I base my projects on xIotFramework - my own IoT framework, which is based on Arduino ports under ESP. I wrote it mainly...[Read more]
Hello to all enthusiasts of home tube designs! I come today with a headphone amplifier project using ECC88 and 6N6P tubes. This amplifier was created to drive the Beyerdynamic DT990 Pro headphones, which, as befits studio headphones, have a sizable impedance (250 Ω). It was one of the longer projects, due to the fact that I am still a beginner...[Read more]
For my own purposes, I made a wire cutting machine to complement the electronic boards I offer for model railways. The premise was to cut the wires to a set length and quantity. Electronics . To speed up the build, instead of making a PCB I used off-the-shelf solutions: a CNC shield for an Arduino nano with two stepper motor controllers. To...[Read more]
. Hello :) . I present another watch from my collection. I got a bit bored with the blocky shapes and came up with something like this. :) We all have a fascination with tube displays from a bygone era, unfortunately their prices are a bit prohibitive and basically nothing can replace them. The aim of the project was to get at least a minimal...[Read more]
Hello. I used to really like the rechargeable soldering iron from this post: and recently stated that I would attempt my own build. I already had all the parts recycled, the only thing missing was a flat bar for the secondary winding but this was found. The first prototype was according to the diagram from the link, but it didn't work very...[Read more]
. I hope I don't bore you, with my next headphone amplifier. But somehow it just so happened that I've had the verve for such projects lately. This headphone amplifier was created to be used with a phone or laptop. Hence my decision to power it from the built-in batteries (for easier and more versatile use), and to only equip it with a USB...[Read more]
. I built a welding machine a few years ago, it was mainly to be used to weld cells into packages. I have a lot of cast-off components, so I'm trying to put at least some of them to some use. Unfortunately this is going with increasing resistance, but that's another topic. So the result is a rather unusual, processorless circuit, altogether...[Read more]
. The design of this headphone amplifier, is actually an update of my earlier design presented here ( Link ). Compared to the original version, a few things have been changed. The one that is immediately apparent is the casing. The new housing is slightly larger. Its internal dimensions are: 105 x 160 x 35mm (with external: 115 x 168 x 40mm)....[Read more]
Test of eurorack power supplies (and not only, because plug-in ones too!) . . Need, as they say, is the mother of invention. As I am working with a modular eurorack system, and wanted to build myself an efficient power supply for the modular system in the box of a broken ATX power supply, and due to the problems arising during the construction...[Read more]
For some time now, I became interested in network security and came across an article on how to make a Wi-Fi Jammer (deauthentication attack). I did not even suspect that you can make someone's life so easy and simple. To make a Jammer All we need is esp8266. The principle of operation is very simple. Our device pretends to be a router...[Read more]
The author of the following project, having no experience with Raspberry Pi, set about creating a simple air conditioning control system. As he did very well, he decided to create the following guide so that any other person could also build a similar device. Step 1: What you'll need To compile the system described below we need: * Raspberry...[Read more]
Do you have audio equipment that is too old to support Apple Airplay that you want to use? You don't want to replace it with lower-quality wireless speakers, but want to listen to music from the Internet? This is a common problem. The good news is that solving this problem costs as much as the Raspberry Pi - not much. Based on this minicomputer,...[Read more]
In the material below, the author describes how to use Arduino and an RFID reader to build a simple lock. In this system, Arduino reads the RFID tag ID with the help of a special reader. The identifier is displayed on the OLED screen, and if it matches the number stored in the system's memory, it displays the word "Unlocked", it can also...[Read more]
The project below is a weather station based on a module with ESP8266. There would be nothing special about it that distinguishes it from other such constructions, if not for the optimization of the system in terms of minimizing power consumption. The microcontroller used is not very energy-efficient, so it works on average in battery-powered...[Read more]
Currently, in the era of simple and inexpensive GSM modules and Arduino modules, it is very easy to construct an SMS-controlled relay. In the project below, the author used the SIM800L module to receive SMS messages. The whole system is controlled by the Arduino Nano V3 module. The system is equipped with one relay, which is controlled by...[Read more]
Thermal imagers have been fascinating for years. The idea that you can watch images in a part of the spectrum of electromagnetic radiation, inaccessible to our eyes on a daily basis, is extremely interesting and appealing. Unfortunately, the implementation of this task is not cheap - especially if we want to buy this type of camera only to...[Read more]
Microchip ATM90E26 is an integrated circuit dedicated to use in modern power consumption monitoring systems. It allows for easy integration with advanced monitoring systems of the power network within, e.g. our home. The use of such a system together with, for example, photovoltaic systems allows you to monitor the level of generated energy,...[Read more]
Most computer platforms have the ability to connect sensors that operate in the audio band (microphones) or in the visible light (e.g. cameras). However, sensors for electromagnetic radiation in the radio range are not popular and until recently it was difficult to connect to computers systems allowing for any collection of radio waves. In...[Read more]
Pigeon is a simple webcam, dedicated to work in the cloud. It is based on the Raspberry Pi Zero W, costing just $ 10. The minicomputer, together with the camera, are enclosed in a housing made in 3D printing technology. A simple handle is integrated with the housing, which allows it to be mounted anywhere, e.g. on the wall. The software itself,...[Read more]
In Brazil, the Raspberry Pi Zero overclocking record has just been set. The team managed to achieve a clock frequency of 1600 MHz and test such an extremely overclocked computer. This gave them the first place in April in the HWBOT ranking for SoC BCM2835, which is in RPi Zero. The whole overclocking began with one teaser on social networks,...[Read more]
The description below shows how you can convert a Raspberry Pi with a GSM modem to USB into a gateway for sending SMS via the web interface. The project was created using PHP and C #. The software that communicates with the modem is written in C #, and the web front-end in PHP. In addition, the system is equipped with a PostgreSQL database,...[Read more]
The environment monitoring system, based on the LoRa IoT interface, consists of a base station built using the Arduino Mega module with a LoRa gateway and remote stations based on the Arduino Feather, which connect to the base station via the LoRa radio interface. The system allows monitoring of environmental parameters in the house and its...[Read more]
Pi-FM-RDS is an FM radio transmitter equipped with RDS, running on Raspberry Pi. The GirHub downloadable program is responsible for generating a frequency modulated (FM) waveform with encoded RDS data (data transmission system with audio transmission). All this works in real time and is able to work with both mono and stereo audio signals....[Read more]
The electronic fuse eliminates the need to replace the element that burns out with excessive current when using a classic fuse, e.g. a fuse. This element does not act as a current limiter in any way - when it rises above the set limit, the system disconnects the circuit. The limiter would instead limit the flowing current to a predetermined...[Read more]
This simple device has one task - it converts received exiles, broadcast in a walrus alphabet, to Latin letters. This translator can find many applications. With it, you can train your morse broadcasting skills, but also decode data received from the ether. It may be amazing, but the walrus alphabet is still very popular in amateur radio,...[Read more]
This article will describe how to display and record car diagnostic information with a Raspberry Pi. Step 1: Required materials To complete this project you will need: o Raspberry Pi Model B or B + o Car stereo (must have an AUX socket) o Bluetooth adapter o Car charger o USB or Bluetooth adapter based on ELM327. o RCA cable o Keyboard (optional)...[Read more]
Spot welders are used in almost all plants where it is necessary to join sheets. The advantage of welding machines is the precision of joining (with very good electrical contact), and a very low voltage between the electrodes, which makes the device safe. The presented device is of course not a professional welding machine, but an amateur...[Read more]
Hello. I made a soldering iron for plastic. I saw a similar company, and that the construction is very simple and you have to pay for welding, it is worth doing. 5mm diameter, 2m of hose, a piece of cable with a plug. The required pressure is 0.5 ÷ 1.5 bar. I used a simple regulator on a triac to regulate the heater. And the cube to connect...[Read more]
. I would like to present an application that is a collection of test tools using CH341 as a physical interface. The original purpose of this application was to repair laptop batteries. However, I had to familiarise myself with the CH341 chip beforehand, I started with more elementary functions like I2C support and the application took the...[Read more]
Hello, Necessity is the mother of invention, sometimes the right equipment is needed for servicing, such as a low-frequency signal generator used to repair amplifiers and receivers. There are a lot of devices on the market, both new and used, but their price is unacceptable to me. So I thought that in order to save costs I would build something...[Read more]
It may seem ridiculous, but you can build an interesting power amplifier from ordinary operational amplifiers (with the right amount of them). :) From this "miracle" I achieve 2×14 W on a load of 8 ohms. Maybe this value is not shocking, but considering what we get it from, it's probably not a little bit. First things first. This project...[Read more]
The idea came from the fact that the 5-year-old daughter is willing to drive all kinds of vehicles. He packs on a motorcycle, he wants to drive the car, he stays in the tractor with his grandparents, etc. So I decided to build something for her that would allow to develop certain habits of the driver and provide a dose of adrenaline and child's...[Read more]
Hello. I am honored to present my present work committed in 15 minutes during the performance of works at the end of the world, i.e. in Central Poland. Needed was a flow meter with pulse output to control the chemistry dosing pump. Of course, there are ready-made flow meters / water meters with such a function, only that within a radius of...[Read more]
Hello a project done (almost a year ago) quickly in order to show the younger generation what can be done with the idea of some parts (the rest can be done). Hardware: Robot platform bought from China Adruino on the atmega 328 Double H-bridge controller for motor control Converter from 12V-> 5V for the webcam WiFi camera dcs-5222l Akku 11.1V...[Read more]
Hello. I would like to present an electro-spindle made by me from a 2.2kW 2800rpm "dachshund" type engine. The design was created for use in a small universal milling machine for machining aluminum and steel. I decided on my own design, because within the budget I would have to choose a liquid-cooled Chinese reaching 25 thousand rpm, but...[Read more]
Hello! I would like to present the Bethlehem Star I made two years ago. The entire structure is made of sheet metal. There are 78 5mm LEDs in the drilled holes (34 red, 33 yellow, 10 green, 1 blue). The star's tail is the ne555 + cd4017 base configuration. Three series-connected LEDs are connected to each counter output. The center of...[Read more]
Hello, I wanted to present a simple and proven (using the GLUCOFACTS Deluxe v3.05 program) cable to read data from the Bayer Contour TS glucometer. Of course, there is nothing extraordinary here, and his advantage lies in simplicity. For anyone who needs to archive measurements from time to time and has a computer with an RS-232 port, it...[Read more]
I've been recently experimenting with simple flashing code for BW16E (RTL8720DN AmebaD) board, in theory also working for any of RTL872xDx family. RTL8720DN is a WiFi (2.4GHz and 5GHz) and Bluetooth (LE 5.0) module that features dual core CPU using KM4 and KM0 cores. It can be bought for as low as 1$. Here I will show my experiences with...[Read more]
. OpenBeken has long had integration of the LittleFS file system allowing files to be stored and managed directly in the microcontroller's Flash memory. This allows you to conveniently create device-specific configuration panels, such a panel itself is implemented in HTML and its communication with the firmware is done through a REST interface,...[Read more]
. Here I will show how to easily run an external Flash memory with any microcontroller based on software SPI. I will discuss here the operation and meaning of the different operations (read, write, erase) and implement them in code. The topic of using such memories seems interesting to me, to say the least, because it is very easy to get...[Read more]
. I would like to invite you to a presentation of the interior of an older Crown Japan radio alarm clock model CR-S9028, designated DIGITAL LED-Uhrenradio. The unit offers FM reception in the 88-108 MHz range and AM reception in the 540-1600 kHz range. It is equipped with an LED display showing the current time, an alarm clock function with...[Read more]
. A switch is a device that connects different equipment on a network and allows them to exchange data. A switch differs from a router in that it is used to network multiple devices, whereas a router also connects different networks. A switch is often used when you are short of ports on a router - it can be added to a network without additional...[Read more]
As proposed by @pkaczmarek2 I'll try to share some ideas for my OpenBeken IoT firmware extensions and features here, starting, "as requested" ;-) with the extended DS18(B)20 driver. The code is in PR #1627 I'll start with some information and screenshots, but I would be glad to get some feedback on more basic questions in the later part of...[Read more]
. "Vibe coding" is a term used to describe programming based entirely on code generated by artificial intelligence. The programmer then just briefly describes his requirements in natural language and the LLM (language model) translates this into code. Proponents of this method praise it because it allows results to be obtained quickly and...[Read more]
. Hello, I recently had my energy meter replaced by Tauron. As it turned out, the new one has remote reading. Therefore, I became interested in the subject of integrating the meter value reading with the Home Assistant. Unfortunately, as it turned out, the model I had installed did not have wMBus support. All that was left, therefore, was...[Read more]
. Home Assistant is a popular, open source home automation system that allows the integration and personalisation of many different systems and series of devices. One simple but effective way to personalise the HA interface is to change the icons assigned to entities, such as switches, sensors or lights. Home Assistant uses icons from the...[Read more]
. ESP32 modules often offer the possibility to connect an external WiFi antenna, which can significantly improve signal quality and range - especially in projects operating at a greater distance from the router or in difficult conditions (obstacles, interference). Many modules (e.g. ESP32-WROOM-32U) and boards (e.g. LilyGO T-CAN485) have...[Read more]
. The ESP32-S3 Touch LCD 4.3 is, as the name suggests, a module featuring a 4.3" touchscreen controlled by the ESP32-S3, which is a dual-core, 32-bit Xtensa LX7 processor clocked at up to 240 MHz with 8MB Flash and external 8MB SRAM. The whole is enriched by various peripherals such as RS485, CAN, I2C, a 3.7V lithium battery charger or there...[Read more]
The C-SKY Flash Programmer is a piece of software supplied for download by XuanTie at This tool works with CK-Link programmers to read and write to the flash memory in C-Sky's proprietary RISC core CPUs. CPUs based on C-SKY architecture include the WinnerMicro W800, W801 and W806 - XT804/CK804 type. TaiXin Semiconductor's TXW8xx are also based...[Read more]
Here I will show you how I created and tested a PIR-controlled LED lamp (with light sensor) driver for OpenBeken - all without access to physical device. This topic will cover whole development process: from concept, through simulation, to automated testing. Whether you're learning how to contribute to OBK, or just exploring firmware inner...[Read more]
Let me introduce my mini-drive indicator project, inspired by LED poles I found on AliExpress in three colours - looking "from below": five green, three yellow and two red. They were just begging to be used as an audio output indicator.... . Of course, similar posts can also be obtained in single or dual colour and in any of the available...[Read more]
Some time ago there were several articles on our forum about basic issues, min. <br/span> Some time ago, there were several articles on basic issues in our forum, including "How to check a fuse?", and although several people thought that the subject was too obvious, I would argue that .... maybe not quite. I believe that people, even...[Read more]
. With the increasing risk of power cuts, many people are looking for a simple, reliable and cost-effective solution for emergency room lighting. In this thread, I would like to introduce a practical and flexible lighting system based on a 12-volt LED strip with brightness control (dimmer) that can be powered in a variety of ways - from a...[Read more]
. The Waveshare ESP32-S3-Touch-LCD-5 is a board offering a 5-inch touchscreen with 800x480 resolution (1024x600 in the B version) controlled by an ESP32-S3 with additional PSRAM and a convenient USB-C connector. In addition, a wealth of peripherals are on board, such as a CAN interface, RS485, battery connector and microSD card slot, allowing...[Read more]
BK7252 is a Wi-Fi and Bluetooth Low Energy (LE) combo 32-bit chip designed for audio and video applications. It can be found in both Tuya (video doorbell) and non-Tuya (A9 spy camera) products. It supports up to 6 channels of PWM, and handles audio with a 2-channel DAC and 1-channel ADC. It also supports camera input via an 8-bit DVP interface...[Read more]
Here's a step by step guide for accessing video and audio stream data of cheap Chinese X5/A9/etc cameras using the iLnk/iLnkP2P/PPPP protocol. Those cameras can be bought for as low as 1$ and are sometimes battery powered, but they still come in various models. This demonstration will use a cam-reverse project by David Ventura, which is written...[Read more]
Berry is a lightweight scripting language designed for embedded system. It features dynamically typed, one-pass compiler and interpreter with core’s code size is less than 40KiB which can run on less than 4KiB heap. Thanks to latest OBK integration, Berry can now run on most of new IoT modules, including BK7231, W800/W600, ESP32, BL602, LN882,...[Read more]
![BL602 SM-028_V1.3 Boot Loop After OpenBK Flashing - [APP] [EVT] Unknown code 11, 5795](https://obrazki.elektroda.pl/5153619800_1751838958_thumb.jpg "BL602 SM-028_V1.3 Boot Loop After OpenBK Flashing - [APP] [EVT] Unknown code 11, 5795")
