Sorry.... I have debug nodes.... I thought I included them. They are the only "output" things I have/had working. The graph was still a couple of steps ahead.
There is the inject node to start it all. The READ FILE node, a FUNCTION node, a CHANGE node, another FUNCTION node and the output/debug node.
This is the flow with chart included.
[{"id":"800d634b.cca2f8","type":"inject","z":"6472f474.da7424","name":"","topic":"","payload":"/home/me/TEMP/random_data.db","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":110,"y":190,"wires":[["90ab8d56.8d9c28"]]},{"id":"90ab8d56.8d9c28","type":"file in","z":"6472f474.da7424","name":"Read file","filename":"/home/me/TEMP/random_data.db","format":"lines","chunk":false,"sendError":false,"x":240,"y":190,"wires":[["362b4d02.83adea"]]},{"id":"362b4d02.83adea","type":"function","z":"6472f474.da7424","name":"","func":"msg.payload = msg.payload.split(\" \").map(function(v) { return parseInt(v)});\n\nreturn msg;","outputs":1,"noerr":0,"x":380,"y":190,"wires":[["3655290f.e793ce"]]},{"id":"3655290f.e793ce","type":"change","z":"6472f474.da7424","name":"","rules":[{"t":"move","p":"payload.1","pt":"msg","to":"payload.2","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":360,"y":270,"wires":[["76acfb38.7d5ebc"]]},{"id":"76acfb38.7d5ebc","type":"function","z":"6472f474.da7424","name":"","func":"var t = msg.payload[0];\nt = t - 153251835;\n//msg.payload[0] = t;\n\n// {label:\"indoor temperature\", payload:22}\n// var msg2 = { payload:\"0\", topic: device};\n// {topic:\"temperature\", payload:22, timestamp:1520527095000}\n// { \"x\": 1504029632890, \"y\": 5 }\n\nmsg = {payload:t, \"Temp\":msg.payload[1]};\n\nreturn msg;","outputs":1,"noerr":0,"x":560,"y":270,"wires":[["6397865d.a94918","b1508aa4.5cd908"]]},{"id":"b1508aa4.5cd908","type":"debug","z":"6472f474.da7424","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","x":680,"y":300,"wires":[]},{"id":"6397865d.a94918","type":"ui_chart","z":"6472f474.da7424","name":"","group":"f25bb428.e9272","order":0,"width":0,"height":0,"label":"chart","chartType":"line","legend":"false","xformat":"HH:mm:ss","interpolate":"linear","nodata":"","dot":false,"ymin":"","ymax":"","removeOlder":1,"removeOlderPoints":"200","removeOlderUnit":"3600","cutout":0,"useOneColor":false,"colors":["#1f77b4","#aec7e8","#ff7f0e","#2ca02c","#98df8a","#d62728","#ff9896","#9467bd","#c5b0d5"],"useOldStyle":false,"x":760,"y":270,"wires":[[],[]]},{"id":"f25bb428.e9272","type":"ui_group","z":"","name":"Graph","tab":"91f90dd2.4c30b8","order":1,"disp":true,"width":"10","collapse":false},{"id":"91f90dd2.4c30b8","type":"ui_tab","z":"","name":"Charts","icon":"dashboard","order":19}]