Write a code for SIM800 GSM relay switch

Job Description:

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.

Habilidades: Arduino, Programação C, Engenharia Elétrica, Eletrônica, Microcontrolador

Sobre o Cliente:
( 7 comentários ) Ivancna Gorica, Slovenia

ID do Projeto: #18462001

Concedido a:


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 em 3 dias
(68 Comentários)

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 Mais

€88 EUR em 1 dia
(26 Comentários)

23 freelancers estão ofertando em média €152 nesse trabalho


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 in 2 dias
(259 Comentários)

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 Mais

€166 EUR in 3 dias
(63 Comentários)

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 in 3 dias
(59 Comentários)

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 Mais

€166 EUR in 7 dias
(40 Comentários)

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 Mais

€190 EUR in 3 dias
(36 Comentários)

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 in 30 dias
(9 Comentários)

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 Mais

€150 EUR in 5 dias
(19 Comentários)

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

€80 EUR in 3 dias
(31 Comentários)

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 in 3 dias
(5 Comentários)

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 in 10 dias
(2 Comentários)

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 in 3 dias
(1 Comentário)

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 Mais

€266 EUR in 20 dias
(4 Comentários)

Hi, I have a good working knowledge of GSM and Arduino programming. As I am currently working on SOlar GSM logger device development. So can handle your project very easily. Please do ask for the pictures of the curren Mais

€250 EUR in 3 dias
(0 Comentários)

I'm an embedded developer 6 years ago. I'm an embedded systems lecturer 3 years ago, and I'm an embedded software & hardware developer in Artronix "company for engineering solutions" So you can trust me on your pro Mais

€30 EUR in 3 dias
(2 Comentários)

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

€155 EUR in 3 dias
(0 Comentários)

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 Mais

€208 EUR in 7 dias
(1 Comentário)

Hi , I have worked both AT command and General Firmware based SIMCOM Devices including SIM800/900/800L/800C. I have worked with ATMEGA8/16/32/328p microcontrollers in Arduino mode as well Standalone mode. Can provid Mais

€222 EUR in 7 dias
(0 Comentários)

I have 17 years experience in electronics and 7 years experience in embedded electronics. I have all the necessary software, hardware and test equipment tools to work with projects. I have worked with 8051, PIC, AV Mais

€80 EUR em 1 dia
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