Design an MQTT over GSM modem (with RS485 comms port)

完了済み 投稿 4年前 着払い
完了済み 着払い

Hi, we'd like to design an industrial grade modem. This modem is going to be used to communicate information from "remote" places. Various devices / sensors will be connected to the modem. All this modem needs to be is a bridge between our servers and the connected devices. Small size and modular design is required along with all schematics, BOM, PCB design files etc. (preferably using altium designer but any software will do)

Technical Requirements

* Power Supply : work from 220 V AC (preferably using a small power module that does the conversion for us, e.g. Hi-link modules ([login to view URL])

* Use GSM/GPRS to communicate over the internet. Preferably using pre-approved ICASA certified chips, e.g. SIMcom 868 etc...

* Have a Modular connector ([login to view URL]), e.g. 4P4C for an RS485 output (A and B line)

More detailed information will be supplied on reply to this post.

PCBレイアウト エレクトロニクス マイクロコントローラ Internet of Things (IoT) Schematics

プロジェクトID: #23606088

プロジェクトについて

13個の提案 リモートプロジェクト アクティブ 4年前

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microMagicTech

Hi there! I would like to be considered for this project, I have 9 years of professional experience in embedded systems development. I have worked on SIMCOM, RS485 and MQTT as well. I believe i am the best candidate f もっと

$300 USD 15日以内
(5レビュー)
3.6

13人のフリーランサーが、平均$627 で、この仕事に入札しています。

cpp2048

This is an interesting job indeed as I have been working on MQTT over 2G/GPRS for over 2 years. I am experience electronic designer having wide skill set in these domains. Over 25 years of programming experience in C a もっと

$1750 USD 31日以内
(45件のレビュー)
5.8
tihadyassine

Hello, I am interested in your project and I hope to help you realize it, I am passionate about electronics and embedded development and I hope to share with you my knowledge and experience. I can do this work in 5day もっと

$250 USD 5日以内
(2件のレビュー)
2.9
george19921014

Hello! I am MingChen. 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 in IoT technolo もっと

$500 USD 7日以内
(2件のレビュー)
2.9
Gerrard97

I am an electrical engineer and interested in your project. I have read the description of your project. Kindly send me text to discuss the project in details. Thanks

$750 USD 7日以内
(2件のレビュー)
2.6
rajanverma747

Hi there, I am very interested in your project. I have developed many projects/products using MQTT for my clients and already developed solutions using GSM/4G/NB-IoT modems and holding 5+ years of hands-on industrial もっと

$700 USD 7日以内
(0件のレビュー)
0.0
ThienDinhBa

Hello client, nice to meet you. I have a lot of experience in IOT project research and development I have been involved in hardware research and development for many small sized IoT projects, personal wearable devices, もっと

$500 USD 6日以内
(0件のレビュー)
0.0
TaiZhe0224

Dear, Sir. I am a senior Microcontroller developer and electronic engineer. After reading your description, I am very interested in your project. As you can see in my profile, I have developed the IoT and website , mo もっと

$500 USD 7日以内
(0件のレビュー)
0.0
vikramdabas

Hi, I have designed Modem using MC60E and EC25 with 2G and 4G both. Compact power supply for module for sensors system. Also different connectors RJ45, RJ11 and DB9 etc.. For RS485 i generally use Texas Instruments chi もっと

$270 USD 10日以内
(0件のレビュー)
0.0
techmarvy

This is very interesting concept and we are expert in 2G/3G/LTE modules interface, backend with MQTT, and embedded interface. We will provide you this LTE gateway with hardware and software compete support. So sensors もっと

$700 USD 22日以内
(0件のレビュー)
0.0