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Write a code for SIM800 GSM relay switch

The task is to write a code for the SMS operated GSM relay board.

The GSM module is SIM800. It is connected to ATmega328p via Software Serial connection.

There are two relays that need controlling. Simple ON and OFF function.

I would also like to add SMS temperature query to the code.

The temperature sensor is MCP9700.


two analog to digital channels

ADC_15 and


They are 15V and 30V voltage monitoring channels.

Error report and watchdog timer reset would be welcome features.

Relay control SMS should be "One on", "One off", "Two on", "Two off".

There should also be an option to control the relays in timed manner. Example "One on 10" will turn relay one for 10 minutes.

Once command sent, a feedback SMS should be sent back. For example: "Relay one turned ON".

I would like to be able to send a "Status" SMS to the board and receive back a temperature of the measured environment and the state of the relays.

ATmega328 has Arduino UNO bootloader and the code should be compatible with the Arduino IDE.

Hardware serial can be used for debugging and control.

Kĩ năng: Arduino, Lập trình C, Kĩ thuật điện, Điện tử, Vi điều khiển

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Về Bên Thuê:
( 4 nhận xét ) Ivancna Gorica, Slovenia

ID dự án: #18462001

Được trao cho:


Hi. I am here for your help in this project. Please send me a message to discuss more about this so that I can start working on it.

€150 EUR trong 3 ngày
(67 Đánh Giá)

Hello, how are you. I really interest on this project. I have experience on Arduino, VB.Net, C#, VC++ and MFC. I have experience in developing the MCU embedded system with C,C++ language with PIC, RENESAS, NEC.... I ha Thêm

€88 EUR trong 1 ngày
(0 Đánh Giá)

26 freelancer đang chào giá trung bình €155 cho công việc này


Dear sir I have more than 10 years experience in embedded systems design I can run the SIM800 exactly as requested, please message me so that we can discuss best regards

€166 EUR trong 2 ngày
(226 Nhận xét)

Hello, I am Anthony from Sri lanka. I have 7 years of experience in the field and holds multiple degrees in IT , Electronics Engineering , Mechanical Engineering and Applied Sciences. As a full time fr Thêm

€166 EUR trong 3 ngày
(54 Nhận xét)

Hello. Im designing different electronics devices, mostly based on avr, arm MCUs and boards with them like arduino, stm-discovery etc. (autopromotion^)) Easy and fast task. Lets talk.

€100 EUR trong 3 ngày
(35 Nhận xét)

Hi My name is Vusi and I'm an Electronic Engineer, you can learn more about me from my website at [login to view URL] I can develop and test this in hardware inside two days. I look forward to your reply.

€100 EUR trong 2 ngày
(18 Nhận xét)

Hello, I would like to show you the video of a similar project that I have done. I have noted the all details that you mentioned in job post. What is suitable time to chat with you and also send to you the video of pr Thêm

€166 EUR trong 7 ngày
(26 Nhận xét)

Hi, I'm an electronic engineer with more than 5 years of experience related to Arduino programming and C++. I've decided to apply for the project because I have a lot of the previous experience in working with SIM8 Thêm

€190 EUR trong 3 ngày
(28 Nhận xét)

Hi, I am professional firmware developer and have worked on more than 50 projects. I have completed a number of projects on this site. Please review my profile to see the feedback from my previous employers Additi Thêm

€150 EUR trong 2 ngày
(10 Nhận xét)

I have already worked on sim800 module and make on and off gpio with TCP/ip . so I can do your job within a time limit with your satisfaction.

€311 EUR trong 30 ngày
(8 Nhận xét)

Hi, I am an embedded system developer. I can write arduino sketch (well commented) for your requirement. I have worked on Arduino IDE. I have been working on sim800 for long time now. Lets discuss and see how we can h Thêm

€150 EUR trong 5 ngày
(17 Nhận xét)

Hi I hope you are good I have rich experience of more then 5 years in these fields I did alot of work related to it and sub fields I am capable to deliver in time and budget Thanks Will provide---> -Professional Solut Thêm

€100 EUR trong 3 ngày
(18 Nhận xét)

Yes buddy, a very easy project, U will feel brotherhood,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

€80 EUR trong 3 ngày
(22 Nhận xét)

Hello! After reading your description, I interested to work with your project. I have hardware for testing project. And I have enough experience to make this project Look forward to your answer. Best regards.

€90 EUR trong 3 ngày
(5 Nhận xét)

I have made projects like this and have prior experience in the modules which are to be used in the projects. I will complete this project on time as said. So please provide us with this project.

€80 EUR trong 10 ngày
(1 Nhận xét)

Hi, I have all the required hardware setup locally. Also a few points to clarify with. Can you please open the chat thread for further discussion? Cheers, Fernando

€133 EUR trong 3 ngày
(1 Nhận xét)

Hello. i am electrical engineering expert and i read your job description and files i am very interested in your task doing my best , you will get perfect result, thank you

€155 EUR trong 3 ngày
(1 Nhận xét)

Am a electrical and electronics engineer from university of Nairobi I promise to deliver a good work

€155 EUR trong 3 ngày
(0 Nhận xét)

Hi, Thank you for giving me a chance to bid on your project. i am a serious bidder here and i have already worked on a similar project before and can deliver as u have mentioned I have got Rich experience in Jooml Thêm

€208 EUR trong 7 ngày
(1 Nhận xét)

I am [login to view URL] in I.T i can provide you the best service +923059707936 whatsapp me

€155 EUR trong 3 ngày
(0 Nhận xét)

Hello, I study electroinics as a master of science student in Politecnico Di Torino and I am quite good in programming. Your project is seems interesting I can be a good candidate for it. Please let me know. Best r Thêm

€266 EUR trong 20 ngày
(0 Nhận xét)

I can write the requested c code for arduino. I am an electronic and communication engineering trainee as a final year student.

€277 EUR trong 3 ngày
(0 Nhận xét)