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Write some Software

I got a complete software made by a developer. There is a STM32 microcontroller and SIM900 with GPRS/GSM/email etc

For some reason, the inserted sim card establishes connection and rings normally when i call,

but when i send AT COM i do not get replies.

I need an expert someone to solve the problem.

Skills: Embedded Software, PCB Layout, Software Architecture

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About the Employer:
( 9 reviews ) Limassol, Cyprus

Project ID: #11678768

14 freelancers are bidding on average $238 for this job

sagradoamicus

A proposal has not yet been provided

$300 USD in 4 days
(73 Reviews)
6.8
mechatronicsengr

Hi, I hope you are doing well. I have expertise in GSM based embedded applications. I have understood your project requirements and I can execute it in less possible time. Looking Forward, Khawaja

$263 USD in 3 days
(17 Reviews)
5.7
ibrahimdanish

Hi, I am very much interested in your project as I believe I have the expertise, knowledge, skills and tools to do your project. I am embedded software developer with more than 7 years of experience of professional e More

$500 USD in 7 days
(20 Reviews)
5.0
CoherentTech123

Hello Dear, We are a team of experts with a cumulative experience of more than 50 years in the field of embedded systems, electronics, Firmware development and prototyping. Our experts have hands on experience More

$150 USD in 10 days
(14 Reviews)
4.8
ob100

Hi, Maybe baudrate is incorrect? I did many projects using sim900 modules. Can you provide remote access ? Thanks, ilya

$222 USD in 3 days
(3 Reviews)
4.6
$555 USD in 4 days
(7 Reviews)
2.8
ahmad5857

Hi sir, We are good in embedded systems, we offer you our solution to your problem at very low and affordable rates, I am just in sake for the 5 star review only. Please discuss. We are team of expert engineers w More

$98 USD in 7 days
(5 Reviews)
2.9
saminatinny

A proposal has not yet been provided

$244 USD in 5 days
(1 Review)
2.6
blackwind97

Hello Sir, I would like you to know that for the past 1 year I am working on STM32 cortex M-4 series controller and has also made a code for GPRS/GSM using sim 900 and sim808 modules ,currently I have a product that w More

$100 USD in 3 days
(1 Review)
2.6
mkyadav206

I have working on stm32f4 before one year and also work on gsp module very well. i must complete your project within the time limit.

$240 USD in 4 days
(0 Reviews)
0.0
siangming

I need full source code.

$200 USD in 7 days
(0 Reviews)
0.0
logindtechnology

# Having 17+ years of experience in Design, Development and Project Management of Embedded System software & Industrial Automation software. # Experience in developing embedded software for MPC 5200(Power PC) & ARM More

$180 USD in 7 days
(0 Reviews)
0.0
arunjoec

I'm a professional working with gsm based tracking devices

$111 USD in 10 days
(0 Reviews)
0.0
PavelShilin

Hello. I worked with this modem. Can help. Examples of my work you can find on website http://mcu-systems.com/?page_id=1645

$166 USD in 7 days
(1 Review)
0.0