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C programming of a modbus RTU to MQTT gateway on Atmel ATXmega and Quectel hardware

The skills required for this project are a good knowledge of C programming, modbus RTU, MQTT, AT commands and Atmel microcontrollers.

The hardware is based on an ATXmega(-A4-128) and a Quectel BG95 (or BG96) witch has a built-in MQTT protocol stack. The board will be a modbus RTU slave device with some registers witch are synchronised with the corresponding MQTT variable. The BG95 has a built in GNSS receiver and the time, latitude, longitude and status will be written in modbus registers. An anti-theft function can be activated witch send an alarm in case of a displacement of the system. Alarming will be done through MQTT and SMS.

Programming must be done on CodeVision ([login to view URL]) and if necessary a license will be provided for the duration of the development. We want a well documented, interrupt based and without "wait" and loop programming. All code must be accessible and modifiable, so the use of libraries without sources is prohibited.

A base software with modbus RTU slave protocol, a timed structure and a GPS decoder already exist and will be provided, so the most important thing to do is the interfacing with the BG95. The AT commands to initialize and make a communication with the MQTT broker have been tested and will be provided. The big job is to correctly handle the communication with the BG95 in all situations. The freelancer must have the experience of the communication with such "modem" and be able to evaluate all the possible case of bad situations such as lost of network, crashes or unsolicited messages.

A detailed specification document is provided as attachment.

Beceriler: C Programlama, Mikrodenetleyici, Elektronik

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İşveren Hakkında:
( 0 değerlendirme ) Attalens, Switzerland

Proje NO: #22707963



Hello, I have experience in Atxmega based controller and quectel GSM module like mc60, mc66, ec25. through at command interface. I have developed telemetry device using quectel mc60, sim808, sim800 etc,. where we hav Daha Fazla

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(21 Değerlendirme)

Bu iş için 21 freelancer ortalamada $614 teklif veriyor


Hello sir, Myself [login to view URL] Sekhar,[login to view URL], phd in Electronics from cdeec Innovations,India. We have 15+ years experience designing and developing electronic products. We have in house pcb fabrication facility for pr Daha Fazla

$750 USD in 7 gün içinde
(50 Değerlendirme)

Hello I am experienced electronics engineer with more than 11 years of experience in firmware development, PCB design and prototyping . I have worked on latest IoT platforms too. I have read the details and can help yo Daha Fazla

$500 USD in 7 gün içinde
(207 Değerlendirme)

I wish if you had STM32 based design then I would have liked to work on it nicely. I have worked quite a lot on Quectel BC95 (2G) and used its inbuilt MQTT feature. Its a tested (yes lot of installations done so far) c Daha Fazla

$1500 USD in 15 gün içinde
(63 Değerlendirme)

Hi Sir, we are expert in MODBUS RTU based industrial comm [login to view URL] good and sound knowledge of MQTT. Lets talk to us on this. We are professional engineers and developers who do such projects from the last 10 yea Daha Fazla

$700 USD in 7 gün içinde
(40 Değerlendirme)

Hi, I have experience using CodeVision. I Professionaly has using many other IDE tools such as AVRSTUDIO, Atollic True Studio, Keil, Arduino, Mbed, etc. So using different IDE tools isn't a problem with me. I have u Daha Fazla

$650 USD in 15 gün içinde
(66 Değerlendirme)

Hi, I have gone through the brief details mentioned on the job. I have done multiple jobs with C Programming, Electronics, Microcontroller which are the skills required to get this job done. Lets start the chat so we c Daha Fazla

$750 USD in 18 gün içinde
(6 Değerlendirme)

Hi, How are you? I have read your project description and I am interested in the project. As you can see my profile, I am a full-time developer and have just completed many projects. Specially, I have wide experien Daha Fazla

$500 USD in 4 gün içinde
(9 Değerlendirme)

Hi! I've been working (and still working) with ATXmega microcontrollers from Microchip and I'm familiar with possibilities and resources of this MCU like the DMA controller and event system. Tough mainly I've been usin Daha Fazla

$700 USD in 42 gün içinde
(9 Değerlendirme)

Hello! Nice to meet you! I have read your project carefully. I am very interested in your project. I am a Microelectronics and Automation engineering expert. I have a lot of experience on ARM, FPGA, DSP, Arduino, Raspb Daha Fazla

$500 USD in 7 gün içinde
(7 Değerlendirme)

Hello. As an electronic engineer, I have been working in PCB design/layout and firmware programming field for 18+ years. Here are some of the experiences that I worked ago. - Schematic and PCB Layout using Altium desi Daha Fazla

$500 USD in 7 gün içinde
(1 Yorum)

hi, I have read the details of the project. I have worked as a Windows desktop/embedded *C/C++(MT4, 5)/C# developer for over 6 years, I have completed many simple and complex projects with Visual Studio and C++, some l Daha Fazla

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Hello I am a senior IoT developer and have more than 5 years of development experience. I have read your description and I am interested in your project. I can develop the ATMega/XMega firmware on CodeVision. I can dev Daha Fazla

$550 USD in 15 gün içinde
(3 Değerlendirme)

C & C++ & & C# expert ? JAVA & Qt expert ? AWS & Google cloud ? PYTHON ? ANDRIOD Moreover, I'm a full-stack web developer looking for opportunities to work with your project. I'm working Daha Fazla

$555 USD in 7 gün içinde
(2 Değerlendirme)

Hi, I am embedded software engineer from INDIA currently in Croatia Have been working in gateway software development using mqtt and zigbee network. Would like help you in interfacing with BG95 and tackle issues in va Daha Fazla

$1000 USD in 30 gün içinde
(5 Değerlendirme)

Hello, I have checked your attaching file in your POST. After reading carefully, I have some questions about that. So I need to discuss with you about them. IF you want really this job, hope to chat...thank you..

$500 USD in 6 gün içinde
(4 Değerlendirme)

Hello,sir.I have much experience in Electronics and PCB design. I have much experience in device manufacturing such as PIC, Arduino, STM-series(ARM), FPGA,CPLD,etc. I love Math & Physics. Using FPGA based on Verilog/VH Daha Fazla

$500 USD in 7 gün içinde
(1 Yorum)

We are expert developers who have experience on many python projects work. Lets connect to discuss more about the project in the chat. Daha Fazla

$500 USD in 7 gün içinde
(2 Değerlendirme)

I'm a professional Software Engineers and Electrical engineers. with over 10years experience in Universal Circuit, Simulator (QUCS),PCB Layout, Arduino and have been working on Industrial Automatics and Electronics. my Daha Fazla

$250 USD in 3 gün içinde
(0 Değerlendirme)

Hello, Greetings! ******************** I will SATISFY YOU******************** I will do my best for you. Looking forward to hearing from you and thank you for your consideration. Best Regards From RealMan!

$500 USD in 7 gün içinde
(0 Değerlendirme)

Good Day. I am full-stack developer. I have rich experiences in machine learning, AI, image processing ,openCV and google apis and extensions. I have many experiences in programming languages such as c#, c++, c, ASP. Daha Fazla

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