A lazyweb request, because I’m rushing for a boat, going to be away from reliable network connections for getting on for a week, and would like to be able to play from a running start when I get back next week…
In context of the Tata/F1 timing data competition, I’d like to be able to have a play with the data in Node-RED. A feed-based, flow/pipes like environment, Node-RED’s been on my “should play with” list for some time, and this provides a good opportunity.
The data as provided looks something like:
... <transaction identifier="101" messagecount="121593" timestamp="14:57:10.878"><data column="23" row="1" colour="PURPLE" value="31.6"/></transaction> <transaction identifier="103" messagecount="940109" timestamp="14:57:11.219"><data column="2" row="1" colour="YELLOW" value="1:41:13" clock="true"/></transaction> <transaction identifier="101" messagecount="121600" timestamp="14:57:11.681"><data column="2" row="3" colour="WHITE" value="77"/></transaction> <transaction identifier="101" messagecount="121601" timestamp="14:57:11.681"><data column="3" row="3" colour="WHITE" value="V. BOTTAS"/></transaction> <transaction identifier="101" messagecount="121602" timestamp="14:57:11.681"><data column="4" row="3" colour="YELLOW" value="17.7"/></transaction> <transaction identifier="101" messagecount="121603" timestamp="14:57:11.681"><data column="5" row="3" colour="YELLOW" value="14.6"/></transaction> <transaction identifier="101" messagecount="121604" timestamp="14:57:11.681"><data column="6" row="3" colour="WHITE" value="1:33.201"/></transaction> <transaction identifier="101" messagecount="121605" timestamp="14:57:11.686"><data column="9" row="3" colour="YELLOW" value="35.4"/></transaction> ...
as a text file. (In the wild, it would be a real time data feed over http or https.)
What I’d like as a crib to work from is a Node-RED demo that has:
1) a file reader that reads the data in from the data file and plays it in as a stream in “real time” according to the timestamps, given a dummy start time;
2) an example of handling state – eg keeping track of drivernumber. (The row is effectively race position, Looking at column 2 (driverNumber), we can see what position a driver is in. Keep track of (row,driverNumber) pairs and if a driver changes position, flag it along with what the previous position was);
3) an example of appending the result to a flat file – for example, building up a list of statements “Driver number x has moved from position M to position N” over time.
Shouldn’t be that hard, right? And it would provide a good starting point for other people to be able to have a play without hassling over how to do the input/output bits?
