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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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. ...
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307 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 ...
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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-...
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Two KSZ8851SNL on STM32, working like a hub

https://www.microchip.com/forums/tt.aspx?forumid=173 Two KSZ8851SNL on STM32, working like a hub I have two KSZ8851SNL connected to an STM32H7 board. In a certain operating mode, I would like to ...
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No connection between host PC and mbed via Ethernet

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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 ...
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192 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 ...
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858 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 ...
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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). ...
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libmodbus modbus_read_bits() returns illegal function

It is all okay when it comes to read registers with: modbus_read_registers(ctx,0,32,destination); It gives me values of 32 different registers. But when it comes ...
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435 views

Internet access to LoPy (ESP32) using its GPIO pins

LoPy is a LoRa module which uses ESP32 chipset. It has WiFi and Bluetooth connectivity for Internet. In my setup, I have certain interference issues, so I can't use WiFi nor Bluetooth to connect my ...