I've had the relay blocks on hand for many years, but with the uncertainty of ordering parts from China right now I am finally catching up on other projects.
One of the goals here is to be able to control the sprinklers from my phone -- helpful during maintenance or when I want to manually run a section. However I also have some weather monitoring #ESP8266 boards for checking soil moisture to further fine-tune my water usage.
Проект «Мультиключ». Эмулятор ключей от домофона на ESP8266
Никак не доходили руки до написания этой статьи, точнее я её планировал написать после полноценного перевода устройства на esp32 c3, который никак не состоится. Вкратце напомню о чем этот проект, и чем он закончился в прошлой статье. Мы разрабатываем компактное устройство для чтения, хранения, записи и эмуляции электронных ключей (которые чаще всего встречаются у нас в подъездах и на проходных). Изначально это был проект одного из моих учеников. Но в этом году, для участия во ВСОШ по робототехнике ему пришлось поменять тему работы, которая тоже довольно интересная, как-нибудь по неё тоже напишу). А я по наличию времени и энтузиазма продолжил добивать программную часть. В прошлой статье мы перевели устройство на esp8266, что сделало его более производительным и решило проблему с памятью. У нас получилось прочитать и эмулировать контактные ключи dallas и русские Сyfral и Metacom. После этого мы решили перейти к бесконтактным ключам стандарта EmMarine. Без контактные ключи уже так просто, при помощи одного резистора, не прочитаешь, нужен детектор-генератор на 125 кГц. На этом этапе опять очень помог проект от Alex Malov EasyKeyDublicator . У него я взял схему детектора без изменений. И первые тесты производил на Arduino Nano.
https://habr.com/ru/companies/timeweb/articles/906902/
#c++ #arduino #esp8266 #esp32c3 #emmarine #rfid #timeweb_статьи
Ich verstehe nicht, was an #HomeAssistant "einsteigerfreundlich" sein soll. 
...
Ich habe (vorerst) nur einen Reed-Kontakt am Gas-Zähler und einen Ultraschallsensor (JSN-SR04T) in der Regenwasser-Zisterne.
Beide kann ich problemlos mit #Arduino (und C++) und auch mit den #Raspi-GPIOs (und Python) auslesen.
Es macht mich wahnsinnig.
Der RasPi 4 läuft ziemlich warm und die Einrichtung (via #MQTT) ist alles andere als intuitiv. GPIOs direkt auslesen will es natürlich auch nicht. ...
Am liebsten soll ich mir wohl einen #ESP32 oder #ESP8266 ins WLAN hängen, aber die können keine 5V für den Ultraschallsensor. ...
Und wofür will HA Internet und dubiose "Assistenten", die mir Alexa und KI schmackhaft machen wollen. 
Ich gehe jetzt mal 'ne runde löten zum Entspannen, und wenn mir nichts besseres einfällt, dann kommt #OpenHAB auf den RasPi. ...
Enter #homeassistant. I do not want to tell #v380 app my home wifi password, so I need some other cam.
For a while, #esp32cam was fine. Caveat: I never had a suitable ethernet shield when I needed it, so I ended up putting #esp8266 as wifi repeaters all over the house (well, mainly the basement and other remote places).
Ricordatemi che gli #esp8266 cinesi hanno il problema del D2 e D4 invertiti, infatti dalla parte sotto sono siglati esattamente al contrario. Ero a diventare più scemo di quello che sono da ieri
Atomic Clock trades Receiver for an ESP8266.
Well, you’d still have a clock. But you’d have to set it manually like some kind of Neanderthal. That wasn’t acceptable to [jim11662418], so after he yanked the misbehaving WWVB receiver from his clock, he decided to replace it with an ESP8266 that could connect to the Internet and get the current time via [NTP].
https://github.com/jim11662418/Atomic-Clock-NTP-Modification
![[ImageSource: jim11662418]
This modification was made all the easier by the fact that the WWVB receiver was its own PCB, connected to the clock’s main board by three wires: one for the clock signal, another that gets pulled low when the clock wants to turn on the receiver [usually these clocks only update themselves once a day], and of course, ground. It was simply a matter of connecting the ESP8266 dev board up to the two digital lines and writing some code that would mimic the responses from the original receiver.](https://nerdculture.de/system/media_attachments/files/114/444/060/610/568/686/original/af2959a9e9348b93.png "[ImageSource: jim11662418]
This modification was made all the easier by the fact that the WWVB receiver was its own PCB, connected to the clock’s main board by three wires: one for the clock signal, another that gets pulled low when the clock wants to turn on the receiver [usually these clocks only update themselves once a day], and of course, ground. It was simply a matter of connecting the ESP8266 dev board up to the two digital lines and writing some code that would mimic the responses from the original receiver.")
![[ImageSource: jim11662418]
If you take a look through the provided source code, a comment explains that the WWVB signal is recreated based on the official documentation from the National Institute of Standards and Technology (NIST) website.
<https://www.nist.gov/pml/time-and-frequency-division/time-distribution/radio-station-wwvb/wwvb-time-code-format>
There are functions in the code to bang out the 500 ms “one” and 200 ms “zero” bits, and once the microcontroller has picked up the correct time from the Internet, they’re called in quick succession to build the appropriate time signal. As such, this code should work on any clock that has an external WWVB receiver like this, but as always, your mileage may vary.
This is a very clean hack, but if you wanted to pull off something similar without having to gut all the clocks in your house.](https://nerdculture.de/system/media_attachments/files/114/444/067/235/135/529/original/3a84b31018a3a314.jpeg "[ImageSource: jim11662418]
If you take a look through the provided source code, a comment explains that the WWVB signal is recreated based on the official documentation from the National Institute of Standards and Technology (NIST) website.
<https://www.nist.gov/pml/time-and-frequency-division/time-distribution/radio-station-wwvb/wwvb-time-code-format>
There are functions in the code to bang out the 500 ms “one” and 200 ms “zero” bits, and once the microcontroller has picked up the correct time from the Internet, they’re called in quick succession to build the appropriate time signal. As such, this code should work on any clock that has an external WWVB receiver like this, but as always, your mileage may vary.
This is a very clean hack, but if you wanted to pull off something similar without having to gut all the clocks in your house.")
My ThingPulse #esp8266 weather forecast display stopped updating so I rebuilt it to be a co2 level display for the office 
I just need to add ntp and a last updated time now and reduce the updates to every 5 minutes...
#Happy420 Day! Den Tag zum Anlass genommen, habe ich heut ein weiteres Development Release meiner #CanGrow Firmware zusammengeschnürt und den v0.2 Entwicklungsstand in den Git main gemerged, da dieser nun voll funktionsfähig, wenn auch noch nicht feature complete, ist :)
Neben einer aktualisierten Readme im Git Projekt gibt es auch unter den Release pre-built Binaries zum direkten Upload auf euren #ESP :)
Ihr findet alles weitere hier: https://git.la10cy.net/DeltaLima/CanGrow
Baking some 420-Builds
Edit: Grab your warm and fresh copy https://git.la10cy.net/DeltaLima/CanGrow/releases/tag/v0.2-dev4
Leider habe ich aktuell das große Problem beim ESP32-C3, dass die default Partition im Flash zu klein ist um ein paar KB, sodass ich beim compilen eigentlich eine andere Partitionstabelle wählen müsste, womit dann aber OTA Update verloren ginge. Hier werde ich noch schauen, was ich alles an Speicherplatz noch einsparen kann, da gibt es noch sehr viele Ecken, wo was geht. (gzip, sachen statischer bauen, mehr generalisieren usw usw)
Auf dem "normalen" #ESP32 und #ESP8266 klappt alles aber noch :)
Wireless Sensor Network WSN As A Soil Moisture Data Acquisition Device In Grape Plants Based On IOT Using Wemos D1 Mini ESP8266
ESP8266 eBooks 
https://bokfive.com/esp8266
For more follow @bokfive 
Ever needed to tri-state an #esphome GPIO?
HIGH and LOW not enough for your projects?
Need a bit of high-Z or dual-use the pin as Input?
Here's my solution:
Atomic Clock Trades Receiver for an ESP8266 https://hackaday.com/2025/04/07/atomic-clock-trades-receiver-for-an-esp8266/ #Microcontrollers #atomicclock #clockhacks #radioclock #simulator #ESP8266 #wwvb
Atomic Clock Trades Receiver for an ESP8266 - The advantage of a radio-controlled clock that receives the time signal from WWVB ... - https://hackaday.com/2025/04/07/atomic-clock-trades-receiver-for-an-esp8266/ #microcontrollers #atomicclock #clockhacks #radioclock #simulator #esp8266 #wwvb
Обнаружение протечек воды на базе NodeMCU и Wi-Fi с отправкой уведомлений
Защита от протечек воды — важный аспект безопасности и комфорта в любом доме. Быстрая реакция на утечку может предотвратить серьезные повреждения и затраты на ремонт. В этом проекте мы создадим автономную систему уведомления о протечке воды с использованием микроконтроллера NodeMCU, которая будет отправлять SMS-сообщения при обнаружении утечки.
https://habr.com/ru/companies/exolve/articles/898228/
#esp8266 #протечка #sms_api #sipтелефония #esp32 #c++ #оповещения #умный_дом
esp-fs-webserver (2.0.8) for esp32/esp8266 by Tolentino Cotesta
https://github.com/cotestatnt/esp-fs-webserver
From FSBrowser.ino example to library
InverterWEG (1.0.5) for esp8266/esp32 by Ítalo Coelho
https://github.com/italo-coelho/InverterWEG
WEG Inverter ModBus Communication
EspDDNS (0.0.2) for esp8266/esp32 by Amitesh Singh
https://github.com/amitesh-singh/EspDDNS
esp8266 and esp32 DDNS client library with IPv6 support
AsyncEspFsWebserver (2.0.2) for esp32/esp8266 by Tolentino Cotesta
https://github.com/cotestatnt/async-esp-fs-webserver
Based on the library ESPAsyncWebserver
I got all the needed parts in my magic box. Now I can scan WiFi networks :)
Btw: the network you see is from my other esp8266 server ;) (8266.p1x.in)
