I have a probably very special question, but I would still be very happy about your help. First things first, I have basic Python and Dart/Flutter skills. For days I have been trying in vain for a solution to connect a Raspbarry Pi (Python) and a smartphone (Flutter). I want to be able to control an LED using a flutter app, so I have to control the GPIO Pins via a Flutter application. I totally don't care whether the connection is established via Bluetooth or the Internet. I can't find any instructions or a tutorial on the internet, so my question is whether you might have found a good video or blog entry on this topic. I would be very happy if you could write me a link to a good explanation in the answer box. It would be even better if someone of you knows how to connect an Rpi and a smartphone and that person could explain it to me. Many many thanks in advance and greetings
Why you don't create a Websocket/Http_Server in Rpi Python that interacts with the GPIO and in other side create another Websocket/Http_Client for your flutter mobile app and exchange data between them.
Related
I been looking everywhere online for this exact configuration but can't find much.
I want to program my AtMega328p MCU (its on a breadboard) using Python from my Raspberry Pi 4 but I am not sure how to check if communication is going on between them? I have the MISO, MOSI, SCLK, and CE0 pins from the Pi connected to the MISO, MOSI, SCK, SS pins on the AtMega328p respectively.
I understand I have to use SPI communication, however how can I exactly send data from the Raspberry Pi to the MCU to ensure there is communication between the two? Maybe some code to send to the MCU and receive it back? I been using the SPI Dev Python libraries but can't find much info on it. Thank you in advance!!
To load code onto the AVR (program it), you want to use existing software like avrdude that already speaks the AVR ISP protocol. avrdude already has support for using the RPi SPI headers - just use the linuxspi programmer type.
Here's an article by the author that explains it (although there are probably more recent articles if you search around) http://kevincuzner.com/2013/05/27/raspberry-pi-as-an-avr-programmer/
Is there a reason you want to do this from Python specifically? Or are you referring to communicating between the uC firmware and some Python code on the Pi?
This question is more about advice on how to approach the best solution and possible frameworks to look at.
Desired Result
I am currently attempting to create a very basic plug and play raspberry-pi which can be controlled via an API to perform various tasks such as stream a webcam or turn an led on. The device should connect to anyway wifi and automatically be able to be controlled by the API.
Current Problem
The goal of the app is to create a very easy to use plug and play solution. However I am running to to problem when trying to create a WebSocket on the PI as I cannot seem to be able to access it from an external network. I have looked into automatic port forwarding solutions such as UPnP however all of the results are extremely old. I have also thought about creating the Python WebSocket on a cloud server and use the PI as the client to connect and pass data. Please correct me if I am wrong, however this method does not seem very scalable when there are 10s/100s/1000s of pi's connecting to the same socket.
Any advice would be greatly appreciated.
First, thank you all for your useful posts. I can usually find what I need from SE without needing to make a post.
I'm hoping to make a timer/sensor device that I can control from a web browser.
I'm planning to hook up a set of sensors by USB or pinouts to a Raspberry pi, then having the Pi host a web server. I have experience writing web servers from scratch in python, so I intend to use python as my programming language for this application as well.
I want to be able to visit the server from another device that will run at a time-keeper's station. By selecting options on the web site, you could control the display portion of the timer or the values of variables (timer reset) also the sensors could trigger update events to show information on the web page.
My primary obstacle in this case is the hardware interface. I imagine I would need to look up how sites like OMSI allow users to control the motors that move their webcam, or other online control of hardware.
What should my search terms be, or do you know of any libraries for python to read and write to external (adafruit-style) sensors?
Thanks!
Anthony
(https://i.stack.imgur./RzWIl.png)
"Raspberry pi python gpio" "Raspberry pi python i2c" "Raspberry pi python spi"
Everything is in the title but I'll try to explain why I want to do that ;)
In fact I'm currently developing a system (mainly based on python) which try to furnish statistics concerning the presence or not of people in a dedicated place. Those statistics are based on smartphone Wifi packet emission.
For the moment I'm able to listen every "probe request" emitted. The problem is that probe request are not emitted continuously and so we lose precision concerning the presence or not of a smartphone at a given moment.
So to summarize, I'd like to do a "kind of ping" on smartphones which aren't connected to a network to know in a almost continuously way if someone is in the monitored place.
Hope I've been clear ! If not don't hesitate to ask for details :)
Thank you in advance !
P.S : Please apologize me if my English is not so good :')
Goal
I have made a website using the Flask framework and am fairly comfortable with HTML, CSS, JS, Python. My goal is to connect an arduino to the client's PC's usb port and use serial.write() to send a number to it.
Notes
I have a working example of interfacing with python if arduino was connected to the server.
import serial
ser = serial.Serial('COM4', 9600)
ser.write('5')
Now I want to run these exact 3 lines on the client side.
Is this even doable? I have researched a lot and it seems that this is not doable due to security reasons? (I'm hoping somebody proves me wrong here.) That is why I'm looking for a workaround. But before that I must mention, I don't need any of the data (numbers) to come from the server. Once the webpage is loaded all serial communication that I need is on the client side.
Client side python: I have looked into writing python on the client side and read about skulpt and PyPyjs but am not sure how I could run the mentioned 3 lines with them on client side(neither seems to support pyserial needed for import serial or at least I have not had any luck finding documentation)
I also looked into arduino documentation for interfacing with software but it seems that all the languages mentioned are server side. If you know of any possible direction languages that could help, I'd be happy to know and go learn them. I saw many forums mentioning Node.js but my understanding is that would also only do the job on the server side.
I'd appreciate any help on where else/other topics I should look into. Thanks in advance.
Is this even doable? I have researched a lot and it seems that this is not doable due to security reasons?
You are correct. There is no ability for browsers to access a COM port. It doesn't matter what language or framework you pick, a browser isn't going to give you that access.
You would need to make a standalone desktop application. You can use HTML and JavaScript to access serial ports, just not in a browser. Chrome Apps (which are actually going away) can do it, as well as an App that uses Electron.