13 Comments

  1. Stefan
    7. January 2018 @ 19:29

    Hi Andreas,

    it’s very off-topic: I have bought the USB soldering iron from video “#114 Mailbag”. In general it seems to work, but I measure a constant current of 1,45 A. It does not seem to regulate its temperature (switch off). One viewer also statet in the comments to this video, that his tip began to glow. Can you maybe verify this? (I have bought it to have a fine tip to solder the RT9013 in between – until you realize the project with the “Weller tip”.)

    Stefan
    P.S.: I really like your youtube channel and already learned a lot from it!

    Reply

    • admin
      11. January 2018 @ 9:17

      mine draws around 1.2-1.3A and does not glow. However, it is quite hot (around 400 degrees unused)

      Reply

    • Stefan
      9. March 2018 @ 18:10

      Hallo Andreas,

      der folgende Kommentar braucht hier nicht unbedingt veröffentlicht werden.

      Ich wollte mich nur ganz herzlich für die Erwähnung in Video #187 bedanken. Auf meiner Seite habe ich direkt noch ein wenig Werbung für Deinen Kanal geschaltet 🙂

      Direkt im dritten Absatz:
      ——————————————–
      Die Leiterplatte wurde nun auch in dem sehr zu empfehlenden Youtube Kanal von Andreas Spiess kurz vorgestellt.
      Mehr dazu am Ende dieser Seite.

      ——————————————–
      Ganz am Ende:
      ——————————————–

      Überraschenderweise wurde der Inhalt des Briefes auch gut lesbar in die Kamera gehalten. Also kann ich diesen hier nun auch (natürlich mit ein paar zensierten persönlichen Daten) veröffentlichen:
      Brief

      In den Kommentaren zu dem Video werde ich als “grumpy Internet troll” bezeichnet.
      Das kann ich aufgrund der Tatsache das ich einen kostenlosen Youtube Kanal kritisiere durchaus nachvollziehen.

      Was ich nur an dieser Stelle betonen möchte: Der Kanal ist ohne Übertreibung der beste Youtube Kanal
      den ich kenne. Es war nie meine Absicht, diesen als schlecht dar zu stellen.

      Auch das Experiment mit diesen zwei “Mailbag”-Videos eine Abstimmung über zukünftige Inhalte zur Verfügung zu stellen finde ich hevorragend und sehr großzügig. Die meisten Bastler machen einfach das was ihnen am meisten Spaß macht 😉

      * Danach noch eine neue Kommentarsektion *
      ———————————

      Viele Grüße
      Stefan

      Reply

  2. Robert Werner
    8. January 2018 @ 19:43

    Thanks for your help with this Instructable:
    https://www.instructables.com/id/Solar-Weight-Based-Plant-Management-With-ESP32/

    I really enjoy your videos–they are certainly the best I have ever seen for intelligent analysis of these devices.

    Reply

  3. Stephan Becker
    7. April 2019 @ 8:49

    Hallo,
    ich verfolge seit einiger Zeit mit Interesse die Videos – einfach super.
    Ich hätte eine Idee für neue Projekte:
    ACS712 in Kombination mit ESP32: interessant, um “dumme” Waschmaschine “smart” zu machen. Letztlich benötigt man nicht das “volle Spektrum” der Leistungsmessung. Reicht da ein 5A Sensor aus (auch wenn die WM mehr Leistung benötigt), da man damit am unteren Ende genauer messen kann oder macht man damit die dahinter liegende Elektronik kaputt?
    PS: bin kein Elektroniker wie Sie:-)

    Reply

    • admin
      14. April 2019 @ 11:50

      Der Sensor muss für die maximale stromstärke zugelassen sein, sonst kann er schmelzen. Ausserdem ist beim Umgang mit starkstrom Vorsicht geboten. Waschmaschinen arbeiten oft mit 3 Phasen (400 v)

      Reply

  4. Eric
    23. May 2019 @ 9:20

    hi, Andreas, thanks a lot for all your work , really nice job as usual ! regarding this IKEA weigh scale hack, you didn’t chose to use the TTGo32-LoRA board which should have been very useful (for educational purpose).

    Is it because the assigned pins for hx711 are already used by the LoRa chip and no other pin can be used ?

    I tried on pin 35 and 32 which seem not to be “internal feature” specific yet I had no success… which one would you suggest ?
    greetings from Annecy *<8oD

    Reply

    • admin
      24. May 2019 @ 18:57

      I cannot check, but I assume you use the SPI bus for both devices. And I slow down the clock to make it compatible to the HX711 it probably needs some tinkering to get both working together. I read that the new HX711 library should be compatible with the ESP32 without the trick. Maybe you try this one and use a CS signal to select Lora or the HX711. You have to dig into the SPI bus specs for that.

      Reply

  5. Eric
    27. May 2019 @ 12:23

    Thanks Andreas !
    I didn’t get in closer look with this new lib nor with the SPI bus things.
    actually, I didn’t realized that the HX711 was also dealing with SPI , or I probably (mis)thought DO and CK could be matrixed to any other pin and starting using them with a spi.begin(clk, miso, mosi, ss) call.

    but probably this is not doable as there’s only one spi driver in the ESP32 … and I need to test the CS signal instead 🙂

    thanks again for your time

    Reply

  6. Harri Lumme
    27. October 2019 @ 20:15

    Dear Andreas! Sorry to write this duplicate comment ( I already submitted one in YouTube).
    I have two questions of the HX711 interface. Is it necessary shut down and reopen the chip after every read cycle? Is is to conserve power?
    Secondly I have a very nice weight cell hardware package – originally a fish weighing scale. It is however very sensitive to temperature changes (maybe it is only half bridge?). Therefore I would like to use the B channel to monitor the temperature. Does your HX711 library have a provision for channel B read?

    Finally many thanks for the very informative and well produced channel and web site.
    Harri

    Reply

    • admin
      7. November 2019 @ 17:54

      I think I answered on YouTube

      Reply

  7. Anand
    15. June 2020 @ 9:59

    hello sir,
    can you help me out, i am not an arduino developer.
    i am stuck at this. In the code, the loop never stops.
    I want to trigger 2 relays using BLE and also set
    the activetion distance area to 5meters from the esp32 so that it
    triggers only when the BLE device is 5mtrs away.when it is detected
    i want it to stay on, while running the code the relay switches on and
    off every 2 seconds. hope you would fix it for me.
    Thanks Anand.
    (the code is:)

    #include //Header file for BLE

    static BLEUUID serviceUUID(“0000fff0-0000-1000-8000-00805f9b34fb”);
    static BLEUUID charUUID(“0000fff0-0000-1000-8000-00805f9b34fb”);
    String My_BLE_Address = “c1:b4:70:74:fb:66″;
    static BLERemoteCharacteristic* pRemoteCharacteristic;

    BLEScan* pBLEScan;
    BLEScanResults foundDevices;

    static BLEAddress *Server_BLE_Address;
    String Scaned_BLE_Address;

    boolean paired = false;
    boolean chkConnet = false;

    bool connectToserver (BLEAddress pAddress)
    {

    BLEClient* pClient = BLEDevice::createClient();
    Serial.println(” – Created client”);

    // Connect to the BLE Server.
    pClient->connect(pAddress);
    Serial.println(” – Connected”);
    BLERemoteService* pRemoteService = pClient->getService(serviceUUID);
    if (pRemoteService != nullptr)
    {
    Serial.println(” – Found our service”);
    return true;
    }
    else
    return false;

    pRemoteCharacteristic = pRemoteService->getCharacteristic(charUUID);
    if (pRemoteCharacteristic != nullptr)
    Serial.println(” – Found our characteristic”);

    return true;
    }

    class MyAdvertisedDeviceCallbacks: public BLEAdvertisedDeviceCallbacks
    {
    void onResult(BLEAdvertisedDevice advertisedDevice)
    {
    Serial.printf(“Scan Result: %s \n”, advertisedDevice.toString().c_str());
    Server_BLE_Address = new BLEAddress(advertisedDevice.getAddress());
    Scaned_BLE_Address = Server_BLE_Address->toString().c_str();
    }
    };

    void setup()
    {
    Serial.begin(115200);
    Serial.println(“Project-4”);

    BLEDevice::init(“”);
    pBLEScan = BLEDevice::getScan();
    pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());
    pBLEScan->setActiveScan(true);

    pinMode(12, OUTPUT);
    pinMode(14, OUTPUT);
    }

    void loop()
    {

    foundDevices = pBLEScan->start(3);
    Serial.println(chkConnet);
    if(chkConnet == false)
    {
    while (foundDevices.getCount() >= 1)
    {
    if (Scaned_BLE_Address == My_BLE_Address && paired == false)
    {
    Serial.println(“connecting …..”);
    if (connectToserver(*Server_BLE_Address))
    {
    paired = true;
    Serial.println(“ON”);
    if(chkConnet == false)
    {
    digitalWrite (12,HIGH);
    digitalWrite (14,HIGH);
    chkConnet = true;
    Serial.println(“On”);
    }
    break;
    }
    else
    {
    Serial.println(“Pairing failed”);
    break;
    }
    }
    break;
    }
    }
    while (foundDevices.getCount() == 0)
    {
    Serial.println(“***************”);
    Serial.println(foundDevices.getCount());

    Serial.println(“out of range”);
    paired = false;

    if(chkConnet == true)
    {
    digitalWrite (12,LOW);
    digitalWrite (14,LOW);
    chkConnet = false;
    Serial.println(“OFF”);
    }
    ESP.restart();
    break;
    }
    }

    Reply

  8. Tom Braselton
    8. March 2021 @ 15:30

    Hi Andreas,

    I wanted to email you but it you mention that you don’t reply to email and only comments. I figured that I would comment on this blog entry as I did something similar for my dog – it’s a water monitor in my case – http://thebraseltons.com/h2ellie/

    You can click the “What is this?” In the top left corner. It was using a load cell and a Particle Photon. We have to take care of our animals!

    My main reason for contacting you is that you are a sharp fellow and you enjoy ham radio stuff. I have recently become interested in fox hunting/ARDF/Direction Finding. It seems that some of the common methods are a bit antiquated and I wanted to bring it a bit to the current century. Currently, there are two main methods used today. A doppler array of antenna on the top of a vehicle is great for getting you close but then you have to use the other main method anyway – a yagi and handy talkie.

    I’m using an ESP32, a BNO055 (accelerometer, gyroscope, magnetometer), and the same chip as the Baofeng UV-5R (RDA1846) for the RSSI/VSSI.

    The ESP32 is transmitting the information to my iPhone using BLE and from there, I’m storing, presenting map/scan data and such. My future version of the software will allow multiple hams to join a group ID and then share the triangulation data for high speed acquisition.

    I’d love to borrow some of your valuable time via Zoom/FaceTime to chat about it a bit for some feedback from someone with your experience. It has been a fun project for sure!

    If you are interested, feel free to contact me and you can also delete this comment if you would like. 🙂

    Reply

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