I'm not a programmer by any means. I'm trying to figure out how to measure the seconds/milliseconds between two different node events which should end up around 20.xxx seconds. I'm experimenting with a simpletime node as a trigger, mysecond/my millis checked, then passed to the function. I have divided the seconds by 1 to force it to a number, and the millis by 1000 to get a decimal (and force a number). While watching the debug node, it occurred to me that the seconds wrap over after 59. Now I'm stuck handling this phenomenon. Would I be better off with a simple timestamp?
Alternatively if you look on the Flows site you will find at least one node that measures the times between messages sent to it, so if you send it a start and stop message it will tell you the time between.
I actually found that flow by accident yesterday morning, imported it & piddled with it, then moved on. After your mention, I went back and tried to find it with no luck. In the meantime, I found Bart B's "Interval" node which works just like I'd hoped. I really wanted to accomplish something on my own, but I'm not quite ready yet
Oh, Steve Mcl, I tried your code and it threw an "NaN". I've seen that before on some of my number puzzle sites, what does that mean?
it probably means means msg.payload didnt have a timestamp in it
This is easy to confirm be using a debug node.
PS, the code i posted does work. Demo...
[{"id":"e34dd9b5.008118","type":"debug","z":"b83d9b41.9c80c8","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":1290,"y":240,"wires":[]},{"id":"7abe0182.47052","type":"inject","z":"b83d9b41.9c80c8","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":1140,"y":180,"wires":[["d6daa69e.7b89e8"]]},{"id":"d6daa69e.7b89e8","type":"function","z":"b83d9b41.9c80c8","name":"","func":"var ts1 = msg.payload; // some other time\nvar diffMS = ts1 - Date.now();\nvar diffS = diffMS / 1000;\nmsg.payload = diffS;\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":1300,"y":180,"wires":[["e34dd9b5.008118"]]},{"id":"15997279.16c56e","type":"inject","z":"b83d9b41.9c80c8","name":"not a timestamp","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"i am not a number","payloadType":"str","x":1120,"y":140,"wires":[["d6daa69e.7b89e8"]]}]
