Sound Pressur Level (dB) - Python with Raspberry Pi 3/Zero
$250-750 USD
Imefungwa
Imechapishwa about 6 years ago
$250-750 USD
Kulipwa wakati wa kufikishwa
I need to create a sound level meter for ambients with 4 MEMS digital microphone, I2S protocol. Also need to show those infos in a 7" LCD display and save those info to a file on the sd card.
The hardware connection and communication between the Raspi Pi to communicate with the ICS43434 I2S Digital MEMS Microphone is done, the mic outputs 2 words of 32 bits each, for right and left channels, from those 32 bits, 24 bits are used for signal data as you can see on the images.
The code has to be well commented and a simple tutorial on how to use/implement the code /libraries should be created.
The main goal is to get the data from each microphone and transform this digital data to decibel (dB) with A-Weighting scale, and also make a Fast Fourier Transform (FFT) to display the frequency domain and save a string with (Hour, DeviceNumber, ...dB level) in a .csv file, show these information and the value in decibel dB on a 7" HDMI touch screen (already connected),
A second goal would be to provide this dB and FFT information to a webserver database which could be accessed online at any moment (maybe MQTT protocol or any other).
So mainly you have to know about Python, Raspberry Pi, ARM, I2S protocol, Pointers, DMA, dynamic and static memory. The second goal we can discuss more further.
For this first part I need a clean firmware. The firmware should be full accesible as well as the libraries, so later on would be easy to add extra functionality. It would take samples from MEMS microphones, do the FFT with embedded DSP core, apply A-Weighting, calculate dB, display it with one GUI, and log data to csv file on SD card.
The Image shows the I2S communication on a Oscilloscope
Dear,Sir
I have read your project description and am ready for starting your project for now.
I have enterprise experienced in developing Python,Digital Signal Processing,Rasberii Pi.
I will work very hard and best for you.
Best Regards
Honorable Seniors.I have experience in developing C++, Java, Python developer with 7+ years.
I can complete your project perfectly because I have experience in that filed.
I will work for you all my best. Thank you in advance for your time and consideration. I look forward to working with you soon.
- Desktop Application: C/C++/C#, Java/JavaFX, ASP.NET, Python, OpenCV, OCR, OpenGL.
- Other Application: RaspberryPi, Matlab, Haskell, Mathematics
Hello,
Greetings!
With a proven track record of successful achievements, I am pleased to present my application for your consideration as a Freelancer.
Please have a look at my profile and portfolio to get an idea about our capabilities and some previous work on freelancer.
This bid is approx. I’ll give you exact budget and price once discussing in details with you.
Many Thanks & Regards,
Rishi A.
Hi Sir,
We have team who can design front end RPI based sound pressure level and can also connect it to back end webserver for our usage.
We are professional engineers and developers who do such projects from the last eight years.
We offer you our skills for this project at very low rates comparatively without compromising the quality of work.
Let me introduce you to our company TURKTRONICS.
We are TURKTRONICS. We are professionals with 8+ years of experience in Circuit designs, PCB designs, embedded system solutions, mobile app development, programming and software development. We provide complete end to end solutions for all kind of development projects. IOT is our strong point.
In this bid, prototyping and shipping cost is not included however paying extra slight of money to include prototypes. We have collaboration with Atechcircuits & WELLS Inc in Shenzhen China for excillent quality PCB manufacturing.
We care about our clients and help them to get out of any potential problem throughout the projects and also give post completion technical support if ever required.
We are very much looking forward to hear from you on this in coming days!
Cheers!!!
Ahmad
Lead Technical Engineer
TURKTRONICS
An Internet of Things Company !
Hello, I have briefly read the description on Sound Pressur Level (dB) - Python with Raspberry Pi 3/Zero development, and I can deliver as per the requirements however I need us to discuss for more clarity on the details, deadline and budget as well.
Hi,
I am an electrical engineer and have been working as embedded systems developer for past 4 years. I have developed systems using arduino, STM32, PIC and raspberry pi. I have created a number plate recognition system, driver fatigue detection system and video surveillance system using raspberry pi and pi cam.
These projects were very similar to your project. i can complete your project in minimum time and with excellent quality.
Looking forward to your response.
Thanks
I am a specialist and sure of what I can do and convey. I can deal with Arduino, Python, Java, c+ Matlab, among others. I am requesting an opportunity to work with you on your undertaking. you can hire me direct through this link https://www.freelancer.com/u/biobee