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No such file or directory. If my analogy is correct that would indicate a high placed on the TX lead of the module. This causes many questions in my mind.
Is that correct? I am at this point because I wanted to make the presentation on the page a bit more elaborate, like colors for the buttons, add some buttons and spacing, but trying to upload the HTML code within a string would not work. I had it working on a module in the past, but something happened since then and I get interpreter errors when trying to upload the lua program via ESPlorer. Unfortunately without much luck so far. Can you offer any help?
It seemed to upload, but the only thing that happened was the blue led on the module that indicates serial traffic came on solid. Do I have to remove nodeMcu from the module? Do I need to configure the with a bootloader, similar to the arduino?
Forgive me if I get a bit more in depth but I want to present as much information as I can with my limited experience with this module. At this point I decided to reflash it with nodeMcu in an effort to restore operation.
Then opened Esplorer set for baud native for nodeMcu and connection was never established. It just continuously retried. Next I set the baud rate at and reset again.
But still a non-working system. It worked fine. So I still have the question What is happening within when this thing is flashed with the various firmwares? I will attempt to upload other example sketches for varification, then my next step will be to now try to flash nodeMcu again with the impression that something, a vector table perhaps, gets overwritten during one of the processes.
Any insight into this mystery to me would be greatly appreciated. You need to be connected to the same network as your ESP, please read this guide https: There is no connetion to the network. The same board works fine with your humidity sketch.
For example, I think I mentioned it to you before using this sketch with the Arduino IDE I expanded on it to create an under cabinet puck light controller for 5 lights.
I could not get this sketch to work. I could overwrite the sketch with a simple example like blink and it was ok. Can you start from a fresh Arduino IDE installation with the 1. Hi Rui, if I use an esp esp,which has more gpios, can I make some minor adjustments and put 3 instead of 2, like your programme has? Hi Rui, the mystery is solved. I rolled back the board manager to 2. Thanks for reply. Nice job you did here with the ESP I only have 1 question and that is: How is this possible?
Wondering if it normal or … Thanks anyway for the nice example. That means that your ESP is not in flashing mode or is not establishing a connection with your computer.
Please take a look at this guide: Hi Rui, thanks for your tutorial! I modified a project of yours a while back to read a dht21 sensor and post to my phone and it worked great. It worked as is but I am a fan of setting a static ip and could do so with the older sketch using: Static IP details… WiFi. But when I add those lines to this sketch to implement station mode with a static IP, it never connects to the router. Any thoughts on this?
Thanks for any guidance. Hi David. That piece of code basically reads the http request from the client your browser.
We are always saving the incoming data in the header variable with: You know that the http request has ended when you receive two newlines in a row. Regards, Sara. Hi, how are you? Regards, Rui. LEDs do not respond. The DIP switch is: The web server is working.
I tried other combinations of the DIP switch — it does not work. What could be the problem? Also double-check that the credentials are correct and that your ESP is fairly close to your router, so it can establish a Wi-Fi connection. Hi Alessandro. The following tutorial shows how to create access point for esp It should be compatible with the esp My sketch is working when I only use the software buttons on the website.
I also need local hardware buttons to open and close the garage door, but when I include the in the sketch, everything blocks. Please find my actual sketch below. How do I have to include the hardware buttons? Helvetica; display: But I suggest that you use interrupts to detect when the hardware buttons were pressed and change its state on the interrupt handling function.
I hope it helps. Hi All, I am getting data in chunks with 3 second from my device. I need to send that data to my web server. Hi Prateek. Thanks you very much. There is currently no way to compile code into Arduino binaries. It must be said that S4A was conceived as an improvement of the older versions of Scratch the ones that were developed in Smalltalk , to make learning how to program real-world objects easier to everyone, specially to children, by dealing with these real objects in the same way they'd deal with Scratch "normal objects", so they can interact between them.
In other words, it was not made to program the board directly, but to help learn programming and electronics at the same time.
Still, if what you want is to just get rid of the USB cable, we recommend you use a wireless device like XBee. Unfortunately, no. Pin configuration is hardcoded both in the firmware and in the source code of S4A, and the way S4A is made does not allow to change source code "on the fly". So, until we find a better way or enhance the communication protocol between the board and the program, the only way to customize the pinout is by changing both S4A source code and the firmware.
Which boards does S4A support?
S4A works on the three major consumer operating systems: So yes, it will most probably work on your PC. The Debian version of S4A is packaged only for i systems. To get it working in a bit version, you need to follow the following steps in a terminal, as root:. Since MacOS To install S4A, you'll need to change this option to "Anywhere". More info here. Make sure you have uploaded the latest S4A firmware to the board before starting S4A.
To do this you'll need the official Arduino IDE. Please follow the instructions on the Downloads section in this website.
This is a common known issue in Windows operating systems. Try stopping the connection with the board right-click on sensor board in S4A , unplugging the USB cable, plugging it again and restarting the connection.
If the program still does not detect the board, there may be a conflicting serial COM port causing S4A to hang when trying to open it.
To avoid this, try opening it directly right-click on sensor board and select serial port or changing the assigned Arduino COM port through the Windows Device Manager. For more help on this issue, please visit this guide. While working at Citilab , she developed her first final thesis, which consisted in building a framework to work with Arduino boards from within the Pharo Smalltalk environment. Later on, she used this project as the basis on which S4A was written.
While there, he had the opportunity to enter Citilab through an internship, where he later developed S4A, his final thesis. Joan is a biologist who, in his early years, worked in the field of ecology. The need to analyze the generated information and collected data drove his approach to computing.
He enrolled to his first programming course in , when computers where still programmed by means of punch cards. His main work in Citilab has been related to the field of training in two areas: Jose studied advanced telecommunications engineering, but started working at a publishing firm before completing his degree. During his time at the company, he worked on programming a wide variety of applications. At Citilab , he discovered Scratch and Smalltalk , taking up part of his programming work again.
Later on, he joined different projects that aim to establish closer contact between users and programming. He currently leads the Technological Education Research team Edutec. He learned Smalltalk at a course given by Jordi Delgado at Citilab in , where he was later hired to build an online programming school. Since then, he's been involved in several programming projects in Citilab , including a social knowledge management system and different educational applications.
He spends most of his time divulging, spreading the word of and programming in Smalltalk , an amazing programming language that, you know, everyone should be using. The interface An S4A program to control a light-sensor Theremin, with record and playback capabilities Arduino objects offer blocks for the basic microcontroller functionalities, analog and digital writes and reads, and also for higher level ones. You can find blocks to manage standard and continuous rotation servomotors: Connectivity Components have to be connected in a particular way.
You can manage a board wirelessly by attaching an RF module to it, such as Xbee. S4A allows you to control as many boards as USB ports you have.
Compatibility S4A is backwards compatible with Scratch , so you can open Scratch projects in it. Protocol S4A interacts with Arduino by sending the actuator states and receiving sensor states every 75 ms, therefore the pulse width needs to be greater than this time period. Workshop A zip file with complete materials and exercices for a workshop can be downloaded here: Code Videos Some of the following demos are in Catalan or Spanish, but the images pretty much speak for themselves.
Full-featured Robot A robot with a rotative camera, distance sensors and a remote control. S4A Workshop Introduction This video serves as an introduction for the S4A workshops given at Citilab , but you'll find a couple of demos of what can be achieved with our software.
Exercices Music: A theremin-like instrument Domotics: A blind curtain controller Robotics: You can download it here or by scanning the QR code below: To use it, follow the instructions below: Message Specification Broadcast a message: Hi S4A! S4A variables whose name starts with a plus sign i. Thanks to: