CoAP is an application protocol designed for constrained devices, designed to easily translate to HTTP.
Questions tagged [coap]
224 questions
2
votes
0 answers
How to implement DTLS in contiki os and integrate it with coap protocol
https://code.google.com/archive/p/contiki-dtls/ "checked this link but facing problems in integrating as there is no readme here"
https://github.com/renzoe/dtls-contiki/wiki
how to use tinyDTLS in contiki os, can someone explain steps for the same.…
SagarBhanu
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- 8
2
votes
1 answer
How to add a Resource or Endpoint in a CoAP server program Golang
https://github.com/dustin/go-coap
I am using the above library for Building a Server-Client programs in Golang.
How can we add a Resource or Endpoint on Server Side and write a Handler in-specific to that endpoint.
And also how to Publish data to…
2
votes
0 answers
DTLS support over Arduino Ethernet UDP or WIfi UDP
I have implemented COAP protocol over EthernetUDP and WIFIUDP as well. I now need to add Datagram level transport layer security (DTLS). Does EthernetUdp or WifiUdp support DTLS ??
Thanks,
Jyoti Raj Sharma
Jyoti Raj Sharma
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2
votes
1 answer
C:Having some troubles with a pointer to uint8_t[]
I'm working with microcontrollers and got following working code:
.h file
const static uint8_t state0[] = "Off";
const static uint8_t state1[] = "ROMLoad";
const static uint8_t state2[] = "RAMLoad";
const static uint8_t state3[] =…
Whitekang
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- 9
2
votes
2 answers
CoAP server could not be started
when I run HelloWorldServer.java of californium(examples), I got this error.
How do I fix this?
I run this in eclipse..
Mar 08, 2016 8:30:01 PM org.eclipse.californium.core.network.config.NetworkConfig createStandardWithFile
INFO: Loading standard…
Md. Syed Ahamad
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- 6
2
votes
2 answers
How to send firmware package from LWM2M Leshan server to LWM2M Wakaama client?
I have a LwM2M Wakaama client working with a Leshan server. When I try to send a huge hexbinary string via the write option on Package resource for Firmware update object 5, I get the following error message on the client side:
"Block1 NOT…
VKalley
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2
votes
0 answers
Proxy tool for CoAP integrated with DTLS
How to view the request/response for CoAP protocol integrated with DTLS.
Copper (firefox plugin)
tool works fine with CoAP protocol without DTLS. for e.g.
coap://localhost:5683
request/response can be easily viewed and modified.
When DTLS is…
alok chandra
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2
votes
3 answers
Security for Coap messages
Is there any way in which the messages that are send by COAP over UDP packets can be secured ? Any open source projects that I can implement. This message exchange is with a server and the client would be an embedded device. So the cryptographic…
cache
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1
vote
0 answers
Send NGSIv2 data to Orion Context Broker
I explain the problem. I need to register a client to an Orion context broker. The client (OMALWM2M) is connected to the IoT Agent which acts as a bridge with NGSI. My problem is that when I connect to localhost: 1026 / v2 / entities there is no…
Antonio
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1
vote
1 answer
How do I do a task after waiting 10 seconds in Java?
It's the first time I use Java for a project and I need to do this:
send a CoAP POST request to turn on an actuator
wait 10 seconds
send a CoAP POST request to turn off the actuator.
I'm using this code inside the method I wrote that has to…
Mo0oon9898
- 11
- 2
1
vote
2 answers
Asyncio.run gives RuntimeError loop is closed
When trying to create simple coap server with asyncronous function and asyncio.run it return Event loop is closed. Code below:
import aiocoap
import aiocoap.resource as resource
class CoAPServer(resource.Resource):
def __init__(self) -> None:
…
Giulio Barabino
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1
vote
1 answer
How to communicate using libcoap over USB in linux?
I would like to communicate over USB using COAP protocol.
I am currently planning to use libcoap, it has examples but it is based on UDP server-client.
If I want to use USB, what must be done?
Thanks
add
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1
vote
1 answer
Can I connect CoAPthon (CoAP of Python) to node-coap(CoAP for nodejs)?
I am working on a raspberry pi project where I run python script and I want to send the sensor data from that script to my nodejs server. I am trying to connect a CoAP server in python script to my client at the node server. The libraries used are…
Vatsa
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1
vote
1 answer
Unable to get payload response when payload length size is greater than 1000K.(Coap)
I am using Coapthon and Helperclient libraries to get, put, post the data.
I am using below mentioned code line to get the payload. it is working fine without any issue if pauload length size is not more than 1000.
response =…
Sumit
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1
vote
1 answer
Fiware Lightweight M2M agent: how to send measures from devices
I am investigating how to use the Fiware's Lightweight M2M agent.
I read: https://fiware-iotagent-lwm2m.readthedocs.io/en/latest/deviceProvisioning/index.html and this other helped so much: Setting up LWM2M device communicates with IDAS
But I…
Fabio Suarez
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