Project:
Multipurpose user interface for smartphone or webbased control of embedded industrial control
modules via RF using the modbus RTU protocol (hex)
Eample #1
Automatic tyre inflater:
The interface would be able to read and display the setpoint , the current tyre pressure and control the unit with 4 buttons, namely Up Down Start and Reset
Example #2
Control Ventilation as part of a building management system
Same basic requirement, read and display some values like battery voltage or current and have appropriate buttons to open, close vents, monitor number of operations ( maintenance )
and over-ride existing input signals.
Modbus:
The smartphone or webpage would be the master, the devices are the slaves RTU's.
Only some commands of the modbus protocol will be implement. Typically read or write multiple registers or single bits like relay status. The Chipkin Modbus for field technicians is a very good reference document.
The remote devices act like PLC's and will respond with the appropriate error code, should a message be incorrectly formulated, be out of range or have the wrong CRC.
Not more than 64 words of 16 bits would be required for the modbus database.
There are two ( perhaps more ) options. It depends what is more cost effective. One way is to have a dedicated app for each product, mostly due to screen layout issues ore have a more general purpose approach, whereby the app is broken down in to functional blocks that just get dragged on to the screen and the memory location, naming, and control functions assigned.
Typically the control devices are not connected to the web. You have to be in close proximity with the smart phone which could then act as a modem.
In addition, users may have permission only for certain data.
Dear Employer!
I’m Waqas, professional android developer. I’ve completed many projects and delivered highest level of quality software on time with full testing and maintenance support.
Relevant Skills and Experience
I've 5+ years of working experience in providing expertise solutions.
Proposed Milestones
$147 USD - Initial Milestone
Hello, Greetings! I read your post that you need a app. I am a senior developer have wide experience of 5+ years and As an expert, I have developed many apps before and so have the rich experience in this field. I will make native app using latest technology along with back-end panel and web services.
Have a look on my previous work:
https://www.freelancer.in/u/MobiApps21.html
Please feel free to contact with me at any time.
Your idea + My skills = Best Product, Success.
I will be provide best service for our business.
looking forward to work with you!
Thanks & Regards,
Akanksha
Hi There,
We will develop the required app. We have rich experience in IOT and BMS.
Relevant Skills and Experience
We are a startup comapny offering solutions in IOT, Android app development, embedded electronics and cloud based development.
Please feel free to contact us.
Regards,
Shahbaz.
Proposed Milestones
$300 USD - Default Milestone
Hello Hiring Manager,
I read your job descriptions carefully, I am very interesting in your job.
Relevant Skills and Experience
I have developed apps such as Social networking & lifestyle(Tinder style dating, chatting, sharing), Food & drink(Restaurant), Health & fitness, Travel(geolocation), Business(shopping) etc.
Proposed Milestones
$250 USD - Milestone
This is something I was looking for on freelancer, I saw your every requirements and hence I am 100 % sure and confident for this project !
Relevant Skills and Experience
I am working with applications over 6 years and I got a huge team of 30 people who works day and night to put a smile on client's face. Eagerly waiting to impress you !
Proposed Milestones
$250 USD - After Completion
All cleared ( Willing to get your reply ! )
I have more than 5 years of experience in several web technologies and mobile technologies I have checked the details shared by you and it will be done according to your need.
Relevant Skills and Experience
I have worked on similar requirement and am enough confident to take up this project.
Looking forward to work with you.
Proposed Milestones
$155 USD - one
Hey,I am konika. I was looking through your project requirements and I do believe it's something we have experience in previous development and we can complete in a reasonable amount of time and cost.
Relevant Skills and Experience
Android, Mobile Phone, Software Development, Windows Phone
Proposed Milestones
$111 USD - For complete project
Hello
Thanks for posting this job
I will read and understand your requirement.
Relevant Skills and Experience
We at CryptonSoftech having more than five years of experience in the field of Web Development consist of a team of outstanding Web Developers who specialize in hardcore programming.
Proposed Milestones
$277 USD - complete work
We are doing multiple project to control and check status for various industrial and consumer devices over Modbus.
We target to finish this project in 10 days with a budget of 155 USD.
Relevant Skills and Experience
We developed a library to support all usable MODBUS commands on arduino and expose all arduino pins so one can use an arduino as an advanced automation controller for both analog/digital in/out.
Proposed Milestones
$100 USD - Front end App interface with supported command list read, write and status of registers
$55 USD - Back end implementation of control app with final testing and results.
Being embedded system expert we can also work on the device side firmware and SW.