Questions tagged [tcp-ip]

TCP/IP is the suite of protocols used by the Internet and in many other networked systems. Please ensure questions fit within the scope of the site and do not relate to general protocol or networking questions.

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47
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20answers
84k views

What is a good microcontroller for Ethernet applications?

What is a good microcontroller for doing Ethernet applications? Or do I just need a good Ethernet library to connect with an Ethernet MAC/PHY?
37
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9answers
10k views

Why is wired Ethernet losing its speed advantage over wireless?

This has been bugging me for a while now. I did a couple wireless transmission courses back in my university days and it's a known fact that wireless transmission is hard. Partly because it's a shared ...
12
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4answers
7k views

SSL from a Microcontroller

I am wanting make an embedded device that can communicate with a web-server in a secure fashion. My preference would be for it to use standard SSL so the web-server views my device similar to a web ...
11
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1answer
3k views

AT Commands to transmit data through TCP/IP stack with LTE network

I need to design an embedded sotfware that will drive a LTE cellular device (like u-Blox TOBY L2 Series) and its TCP/IP stack to transmit some data toward a distant server. I'm waiting for the device ...
8
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4answers
11k views

Wiznet W5100 vs. Microchip ENCx24J600

What are pros and cons using Wiznet W5100 or Microchip EncX24J600? It's a bit complicated to explain. My question is about the performance of Microchip TCP stack vs Wiznet TCP/IP core on the chip. ...
7
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3answers
7k views

Smallest PIC which the TCP/IP stack can be implemented

What is the smallest (size) PIC with internal oscillator available which the TCP/IP stack can be implemented (and used) successfully? Also, what is the smallest (size) PIC with internal oscillator and ...
5
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1answer
6k views

How does the TCP/IP stack interact with Wifi components?

I'm trying to transition beyond Arduino and I'm trying to learn how to use an RTOS (like FreeRTOS) to connect to the web via Wifi. It seems that FreeRTOS and ZentriOS and other RTOS supply TCP/IP ...
4
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2answers
14k views

Posting to php server using SIM900 GPRS with AT commands

I am using a SIMCOM SIM900 GSM/GPRS module in an embedded hardware application. Rather than sending device data to a server by SMS (what I've been doing so far) I want to switch and start using GPRS ...
4
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3answers
731 views

Wireless Sensor to Internet

Looking for a low cost implementation to post ambient temperature readings from a sensor to servers via a COTS router. 1) Have a temperature sensor connected to a micro controller which sends data ...
3
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2answers
3k views

Working with PIC to send data to server

I'm currently working with the flyport from OpenPicus, it has 24FJ256GA106 PIC processor in it and I was looking for the best way to send information from the flyport to a server. I want to know how ...
3
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1answer
3k views

TCP/IP stack in Verilog

I am about to write a TCP/IP stack in Verilog. I would have thought this was a relatively common thing, and that implementations would readily be available online. The obvious Google search for a TCP/...
2
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3answers
608 views

Looking for a PIC board with webserver [closed]

I am looking for a PIC which has a webserver builtin or has the ability to install one(with) . I want to experiment connecting in reasonable price please)two PIC/PICAXE boards or different type and ...
2
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3answers
595 views

FPGA TCP Connection

Is it possible to have a TCP connection with an FPGA? I need a low power device that can control relays based on Ethernet packets that are received and send back confirmation packets.
2
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1answer
193 views

Mbed Cortex-m hardfault when sending data via TCP

I have a TCPSocket* object which holds a connection to a client. This object is passed to another object to send data back to the client: ...
2
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1answer
1k views

What is problem with NRZ and how manchester line coding handles out of sync tx and rx clocks.?

I am reading about physical layer of the OSI model. Specifically the different ways in which digital bits can be represented as voltage levels, among the multiple types are: NRZ. Manchester encoding. ...
2
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2answers
454 views

Sourcing for low power stepper motor driver assembly. Which is best cost and host software wise?

For small batch production I am looking for small low cost product. Need it to be network controlled (Ethernet TCP/IP) with open documentation. The current is about 1..2..3 Ampere, voltage 24..48V. ...
2
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1answer
3k views

SIM800 - HTTP Get request time out

I've been working on a weather station project, and I used a SIM 900 module to upload the data to a web server. Recently I started using a SIM800-DS for the same purpose and I had to rewrite the code ...
2
votes
1answer
1k views

Using Temac Core - XIilinx Virtex 5 board

I intend to send data packets from my PC to a Virtex-5 board over ethernet cable. I found three ways to achieve this -- 1. Use the Microblaze processor core, using the EDK and SDK tools. (However, It ...
2
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1answer
367 views

Adding Wi-Fi to a TCP/IP application that is already running with Ethernet

What to do if you have an Ethernet application that is already up and running with TCP/IP functionality and now you want to add Wi-Fi. Most of the Wi-Fi modules available have embedded TCP/IP stacks ...
2
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2answers
393 views

Modem to Modem via GPRS

I am working on a GPRS communication design. What I want to do to connects two modems together via GPRS. But I found that i could not connect. I was able to connect both modems to the internet using ...
2
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1answer
1k views

AVR Embedded Webserver + Time

I have the task of implementing an embedded webserver (using ATMega328). Broadly, the system would provide the following functionality Allow user to change system parameters using the web interface ...
1
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2answers
3k views

Is it possible to send AT commands through TCP?

I have a SIM900 GSM/GPRS device, I can send AT commands through HyperTerminal and everything is fine. I can configure GPRS connection through AT commands: ...
1
vote
1answer
665 views

Losing sensitive data when trying to send them via GSM

I am working on a system which collects data from a set of ultrasonic sensors. Those sensors work at 40Hz frequency, and each data they send are valuable to me. I need to send those data to a mqtt ...
1
vote
1answer
873 views

512 channel LED strip controller over RJ45 (TCP or UDP based commands)

How would you make the following? I'm looking for a 512 channel LED strip (varying size) dimmer, controlled over TCP/IP or UDP. My dream board has: 512 individual channels @ 12V Each channel ...
1
vote
1answer
261 views

Why is there no reponse from ModbusRTU slave using converter?

There are two devices: Eaton EM20/M (~like Northern Design Cube 400) Volison ADM-5850G Connected them like: Trying to get data from EM20/M which supports ...
1
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2answers
4k views

Testing a connection to a TCP socket through SIM5320A cellular module

I'm using a SIMCOM 5320A module like this one to try to establish a TCP connection. I'm going through SIMCOM's application note on TCP/IP as a reference. The AT commands I'm using may very well be ...
1
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1answer
162 views

Frame Size and Function

With regards to Ethernet frames, the typical maximum size is 1500 bytes. Jumbo frames brought this up to 9000 bytes, and there was even some Super Jumbo Frames of sizes larger than that. What factors ...
1
vote
1answer
89 views

W5500 with POE functionality Link status ON with nothing plugged in?

I am working on a design that uses a W5500 for networking. I followed a reference schematic and believe all my connections are correct, however I am facing issues with the network connectivity. ...
1
vote
1answer
55 views

Unable to use wifi in MPLAB Harmony v3

I just got started with PIC32MZ curiosity development board with MRF24WN0MA Wi-Fi Module and MPLAB Harmony v3. I am unable to find drivers for wi-fi module (including ATWIN1500c) in harmony v3. ...
1
vote
1answer
492 views

mbed OS 5 TCP Socket

I have a few question regarding mbed OS 5's new TCP API: Some background: I will have multiple mbeds linked via Ethernet to a PC. The PC, whose IP address is fixed and known by each mbed, initiates ...
0
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1answer
6k views

TCP/IP stack library for ST microcontroller

I'm looking for a free function library, that implements TCP/IP stack for STM32F103CBT7 (Cortex M3) microcontroller. The datasheet of this controller is following: http://www.farnell.com/datasheets/...
0
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2answers
2k views

TCP/IP stack for wifi module

I keep reading about TCP/IP stack for wifi module. I am having bit difficulty to understand that. I am working on hobby project in IoT and need to choose wifi module for Atmega328P. I heard about ...
0
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2answers
209 views

TCP data vs HTTP data over GSM modem

I am using M95 GSM Modem for remote data communication with the server. The server-end persons want me to use HTTP data connection. Another embedded guy has suggested to use sockets and TCP data for ...
0
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1answer
155 views

Is it possible to install `tcpdump` on an Arduino 101?

Currently architecting a side-project idea I have that requires tcpdump on an Arduino 101. This will be my first project and just wondering if this is possible or ...
0
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3answers
1k views

Serial Over IP or USB over IP?

Need to connect remotely to a device using cellular GPRS gateway. Device supports RS-232 and USB. It boils done to two options: 1.- Serial Over TCP/IP (Serial to Ethernet - to GPRS, or Serial to ...
0
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1answer
103 views

Are Data Cards simply L1 (Physical Layer) Devices?

I was just wondering, how many levels of the TCP/IP (OSI) Stack reside within a modem or a 3G data card and other similar networking devices? These devices do have a physical (MAC) address, which ...
0
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1answer
55 views

PIC Microchip TCP IP Lite Stack on 8bit Microcontroller

I'm trying to learn about ethernet communication on a PIC micro following application note AN1921 however I'm getting compilation errors which seem to imply that the Microchip TCP/IP Lite Stack ...
0
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1answer
126 views

JSON for GSM Comm on STM32

I am making a remote monitoring system using STM32F1 MCU in which there are few digital and analog sensors attached and I would send their readings to a remote server periodically. Can I use JSON ...
0
votes
1answer
52 views

Interrupt during packet transfer

I'm using the mbed TCP/IP Socket library to receive incoming messages via ethernet. Currently, the incoming data is read in an infinite while(1) loop (i.e. as fast as possible). I will also be ...
0
votes
1answer
167 views

AT-CIPSEND Number of Characters SIM Tech GSM modules

I am succeeding in sending an update string via a SIM800L to ThingSpeak but the channel is not updating the channel. I know the string is correct since it is provided by the site that I am posting to....
0
votes
1answer
470 views

How can I test TCP/IP AT-Commands with server?

I'm currently using SIM868 to make a GPS tracker, I wanted to know how to test tcp/ip protocol with a server. I do not have a server but got a website and a wifi connection(DIR-600M Router) , Is ...
0
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2answers
2k views

lwIP - Best way to send data from microcontroller

Currently, I am using Server Side Includes to transfer data from my microcontroller to my webpage. The issue with this approach is that if I want to graph the data I have to store the SSI value in a ...
0
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0answers
26 views

ENC28J60 Circuit Connected With 2 Magjack in Parallel

I'm using ethernet controller chip ENC28J60 and I need to have it connected to 2 magjack in parallel, but I'm unsure if I made a correct circuit, is this can work? Please advise me, thank you very ...
0
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0answers
20 views

HMI lost connectivity to TCP ip network

I need help with an ASEM HMI130TF with a SCADA program on it works on Windows 7. it is connected with LAN network TCP/ip with a PLC and another HMI, and it has a static ip. the problem is it ...
0
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0answers
29 views

Why enc28j60 is not responding to another enc28j60?

I interfaced enc28j60 with atmega328p. Then I connected the enc28j60 board1 using ethernet cable to my laptop. I have checked the transmission and reception over the ethernet and it worked. I can sent ...
0
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2answers
91 views

Troubles communicating with Pathfinder DVL without TRDI Toolz

Recently my team and I have acquired a Teledyne Pathfinder Doppler Velocity Log (DVL) that we are using for an AUV project. In the guide (found here: https://www.manualslib.com/manual/1447288/Teledyne-...
0
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0answers
80 views

No connection between host PC and mbed via Ethernet

...
0
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0answers
45 views

Timer interrupt priority over TCPSocket Callbacks

I have a Timer Interrupt Routine which runs periodically (1000/sec). I plan on using mbed's TCPSocket to receive incoming messages. For obvious reasons, this should not block. It is essential that ...
0
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0answers
1k views

SIM800C - CME ERROR: 15 SIM wrong & CME ERROR: 10 SIM not inserted

I am making a GSM Tracker with SIM800C module. After deploying it into vehicles.. It works fine.. but after some days, it starts responding as CME ERROR: 15 SIM wrong for command AT+CPIN? & CME ...
0
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0answers
395 views

Problem in connecting to a server waiting for a TCP request using ESP8266

I'm using ESP8266 for connecting to a appspot-preview.l.google.com server which listens for TCP request and answers back a number (it's for training purposes). ...