den Function-Node habe ich gar nicht angepasst, ich habe lediglich die Nodes davor für die Shellies angepasst, damit man dort die Uptime auslesen kann.
Du kannst die Doppelpunkte auch durch Wörter ersetzen, allerdings wird die Zeile dann etwas lang. Im Function-Node unten solltest Du aber schnell finden, wo Du " Tage " durch " T " ersetzen könntest:
[{"id":"7b419d8001373380","type":"debug","z":"2c583695f13b3b98","name":"debug 4","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":800,"y":200,"wires":[]},{"id":"c21509154d42a7e2","type":"http request","z":"2c583695f13b3b98","name":"","method":"GET","ret":"obj","paytoqs":"ignore","url":"10.153.10.100/status","tls":"","persist":false,"proxy":"","insecureHTTPParser":false,"authType":"","senderr":false,"headers":[],"x":270,"y":200,"wires":[["6ed593e242bd3794"]]},{"id":"08a5e1b1094f9570","type":"inject","z":"2c583695f13b3b98","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"true","payloadType":"bool","x":130,"y":200,"wires":[["c21509154d42a7e2"]]},{"id":"6ed593e242bd3794","type":"change","z":"2c583695f13b3b98","name":"uptime","rules":[{"t":"move","p":"payload.uptime","pt":"msg","to":"count","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":410,"y":200,"wires":[["7d0aa4674a7566c5"]]},{"id":"7d0aa4674a7566c5","type":"function","z":"2c583695f13b3b98","name":"Seconds to DD:HH:MM:SS","func":" var totalNumberOfSeconds = msg.count;\n var days = parseInt( totalNumberOfSeconds / 86400 );\n var hours = parseInt (( totalNumberOfSeconds - ( days * 86400 )) / 3600 );\n var minutes = parseInt ((totalNumberOfSeconds - ((hours * 3600)+( days * 86400 ))) / 60 );\n var seconds = parseInt(totalNumberOfSeconds - ((hours * 3600) + (minutes * 60)+( days * 86400 )));\n var result = (days < 10 ? \"0\" + days : days) + \" Tage \" + (hours < 10 ? \"0\" + hours : hours) + \" Stunden \" + (minutes < 10 ? \"0\" + minutes : minutes) + \" Minuten \" + (seconds < 10 ? \"0\" + seconds : seconds) + \" Sekunden\";\n msg.payload=result;\n return msg;","outputs":1,"timeout":"","noerr":0,"initialize":"","finalize":"","libs":[],"x":600,"y":200,"wires":[["7b419d8001373380"]]}]