Guestbook

Last Updated on 15. October 2026 by Suffocation●Link status: OK

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Hallo Stefan!

Du hast hier einen wirklich tollen Blog mit vielen interessanten, gut dokumentierten Projekten erstellt, vielen Dank dafür!
Bei der Internetrecherche zum „Retro Projekt – Voltage Blaster“ habe ich die Weiterentwicklung, den „Enhanced Voltage Blaster“ entdeckt (https://github.com/chadr/Enhanced-Voltage-Blaster). Sieht interessant aus, wobei die zusätzlichen drei LEDs (und Vorwiderstände) eher Spielerei sind und bei der Bestückung weggelassen werden können. Wenn man nun noch das Platinendesign komplett auf SMD umstellt (und auch auf den Jumper verzichtet?!), hat man ein Projekt, dass sich kostengünstig herstellen ließe, ohne noch selbst zum Lötkolben greifen zu müssen (quasi den „Enhanced Voltage Blaster Lite“)…

Liebe Grüße aus Niedersachsen,

Thomas

Thomas Wöbbekind, Duingen, 10. Juli 2026

Hello Stefan, thank you first of all for this nice little board with the good instructions. Unfortunately, I got carried away and desoldered the MQ-2 sensors and repositioned them. I haven't managed to get the sensors working again. This is because the wires are not making contact with the fine traces at the former pin holes of the MQ-2.

Is it possible for you to tell me the contact points of the sensor so that I can solder the wires directly to the components?

Best regards from Rüdiger

Rüdiger Rook, Pinneberg, 16. März 2026

Antwort Stefan: Hello Rüdiger,

Sorry for the late reply. If you post this to the contribution, I usually see it faster as not many people visit my guestbook otherwise 😉. I must clarify one thing, the board is not mine, I only got it and tested it, so the thanks belong to someone else. hopefully it worked ;).

In file lib/App/DeviceConfig.hpp
Current: #define MQ2_PIN A0
defined, so A0 should be your pin.

https://github.com/search?q=repo%3Athorsten-l%2FESP8266-AZ-Envy%20MQ2_PIN&type=code●Link status: OK

Dear Mr Stefan,

sie schreiben im „Preview – INA3221 Power Monitor“ bei den Daten das dieses Modul bis zu 3,2A Strom messen kann. Wenn ich das Datenblatt richtig interpretiere dann müsste dazu aber der Shunt Widerstand angepasst werden. Mit dem Standard Widerstand von 0,1 Ohm sind es nur max. 1,638 A / Kanal. Oder habe ich hier einen Denkfehler.

Kind regards and Happy New Year!
Mario

Mario Binder, Pressbaum, 30. Dezember 2024

Stefan, your contribution with the ESP to Alexa is really great. Thank you so much for explaining it so well. I'm impressed.

Jens, Bremen, 7. Juli 2024

I read your ESP32 pages with interest. I wish I could program with esp-idf and C, but after installing the idf I failed with the problem that after working in the Esp32 IDF IDE the
Unfortunately, the „Build“ there doesn't work. The book by Brandes also hasn't helped me much. I would be grateful if you could recommend any literature or web articles to help me with this. Kind regards, Franz Hofmeister

Franz hofmeister, Ismaning, 20. April 2024

Antwort Stefan: Hello Franz (I hope you are well?)
On Windows, installing the IDF is always a bit tricky due to Python versions. You always have to try a bit. I found it easiest to do on Linux, where MOST things fit together. I'm not a real Linux user, but I managed. However, it's not comfortable without a GUI.
Otherwise, unfortunately, I cannot recommend any literature; I always do this directly via the Espressif website. I've also written a few guides for Espressif, but they are rather short and to the point, and I improve them every time I install something myself (there should be a few links there too). Otherwise, I could only offer to send me an email with the exact error, and I'll have a look, but I'm also just a user; if something out of the ordinary doesn't work, I usually have to give up and try things out.

Hello
Stefan

Hallo Stefan, seit ein paar Tagen habe ich ein HuskyLens-Modul und teste das ersten Projekte „Objekt Tracking Pan Tilt“ damit:
https://github.com/makertut/huskkylens-pan-tilt-object
https://www.youtube.com/watch?v=k-LXs94nRaU

Unfortunately, I only get error messages when I compile the sketch on the Arduino UNO:
class DFRobot_HuskyLens‘ has no member named ‚writeOSD‘
I suspect the library is no longer up to date.
Can you perhaps give me a tip based on your experience? I'm not a programmer and I'm looking for a working sketch for the UNO.
Best wishes, Ulli

Ulrich Engel, Berlin, 22. Juli 2023

The instructions for the Arduino VS1053 MP3 audio shield do not work.
The SFEMP3Shield.h library is causing an error. I don't know if that's the only reason, but at any rate, nothing can be heard.

Stefan, Nidda, 5. April 2023

Antwort Stefan: It's a shame it didn't work out for you. The error description is unfortunately a bit sparse to delve deeper into the analysis 😉

Hello Stefan,
I'm currently gaining my first experiences with the ESP-32. I found your blog via Google. You've compiled the most important information in German very clearly to overcome all the hurdles for getting started. Thank you very much.

I saw many other interesting features on your site while I was there, I'll be back.
Greetings Jörg

Jörg, Schotten, 14. Februar 2022

Hello Stefan, you've helped me out of a hole with a few of my small projects now, and for that, I thank you. I enjoy reading your blog and taking inspiration from it.
Keep up the good work!
Siegfried

Siegfried, Halle, 30. Januar 2022

Hello Johannes,
ich bin auf der Suche zur Ansteuerung eines DC-Kleinmotors mit Encoderscheibe auf deine interessante Seite aufmerksam geworden. Ich brauche etwas Hilfe zur Ansteuerung eines Encodermotors ( 25GA310-100, JGY-370 oder JGA25-371). Hilfe in der Form, vielleicht ein Link oder wo ich mich am Besten einlesen kann. Ich bedanke mich zu nächst herzlich und verbleibe mit großem Arduino-Bastlerherz – Johannes (16.01.22 geantwortet SFA)

Johannes, Zella-Mehlis, 16. Januar 2022

Hello Stefan,
You have an interesting blog here. I was looking for information on the ESP32-CAM and that's how I found you. With your help, it was child's play. Keep up the good work!
Best regards
Thomas (BLOG 3D, sturm.selfhost.eu)

Thomas Sturm, Wettstetten in Bayern, 18. November 2020

The site helped me a lot and is a good reference work.

Heinz-Dieter, Osnabrück, 23. März 2020

Great website

Horst, 6. November 2018