mote | Minimum Operational Template

Consider an RPL network as shown in below. In this network node 1 is the root of the DODAG. Node 2 is the sender and sends unicast UDP packets toward receiver nodes (nodes 3-18). The DODAG is working in the non-storing mode and I am using Cooja mote of Contiki-NG to perform this simulation.

The problem is that the packets can only be reach to nodes that are placed up to 12 hops away (node 13 in this example). When the sender wants to send a packet for node 16 for example, we got the following warning by 6lowpan and the packet is dropped at the root: "Not enough packetbuf space to compress header (112 bytes, 92 left). Aborting." (line #706 sicslowpan.c) I investigated the problem and found that the root creates the source routing header correctly and the header is added to the packet without any problem. However, the problem comes from the MAC layer and radio interface. The packet is larger than MAX_PAYLOAD_LEN of radio driver. So the radio driver cannot handle the packet. The Contiki-ng has the nullradio driver by itself, but I think the radio driver and its parameters is defined by the platform. I need to mitigate this limitation. Is it possible to modify the parameters in Cooja mote source code? If yes how I can do that?

I have a complex nested dictionary structured like this:

When trying to disable address filtering by changing RADIO_PARAM_RX_MODE like below, cc2420 auto ack is not working and motes get duplicated packets.

i'm trying to validate my form but always get the same error, this the code of the form:

There's a game named guild wars 2 and it gives us APIs to query almost everything in the game database. My aim is using python asyncio and aiohttp to write a simple crawler and get all the items' info from guild wars 2 game database.

I write a short program, it's work, but it behaves kind of weird, I guess here's something I don't understand about composing the coroutine.

First, I made a request with the Postman app. And, in the response header, there's X-Rate-Limit-Limit, 600. So I guess requests are limited at 600 per minute?

here's my question.

1、After the program finished. I checked some JSON file and they have the same content

I am working on a project in Contiki-NG using one udp-server and several udp-clients. Up to this moment, I've been using only these firmwares, emulated in Contiki Cooja as Sky Motes, but now I need to add a RPL Border Router, which will be the DAG root, in order to perform pings with tunslip6 tool.

However, I can't seem to compile this tool as explained in the tutorials available in github... The ReadMe file in the examples folder says: "It supports two main modes of operation: embedded and native."

Does this mean I can't use tunslip6 with RPL-Border-Router from Contiki-NG Cooja? I remember that I was able to perform that when using the Contiki-3.x version of this example.

Thank you in advance.

I am new to React and react-router-dom and they are throwing me through a loop.

Currently, HashRouter works as expected in development mode and in production using Github pages:

Please correct me if i am wrong, but i thought that by using all.x = TRUE, one cannot obtain mote rows than are present in x. I have done a very simple merge command:

I am new to PostgreSQL and I want to insert mqtt messages to PostgreSQL database using pysycopg2. Unfortunately, it is not working as expected. I think it is a simple error but can't figure out what the error exactly is. First I have published mqtt messages in mosquitto broker using a python script[1] and then subscribed from another script [2] and tried to store into postgresql. The corresponding error message is shown in [3].

Here is my Publisher script for publishing fake mqtt-json data to mosquitto broker: