Quite some time ago I posted a picture of my floor heating regulation. For each room I am running a software thermostat which needed many nodes and was clumsy and hard to read but it works perfectly. (12 rooms, 12 Nod On STPH-2-1-05 Enocean HT sensors, 1 UniPi 1.1, 2 shelly pro4, 23 valves, 3 z-wave radiator thermostats)
Therefore, I was looking for and easy 2 point regulator (thermostat) in Node-red which fulfilled my requirements. Unfortunately, there was no such piece of software and I wrote a single function node that does it all. (including boost functionality)
If you are interested, please feel free to use it and if you could improve it, I would very much appreciate your feedback.
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msg.payload;\nlet runtime;\nlet starttime;\nlet endtime;\nlet myTimeout = 0;\n\n//--------\n\nswitch(topic) {\n case \"soll\":\n soll();\n break;\n case \"config_hys\":\n config_hys();\n break;\n case \"config_boost\":\n config_boost();\n break;\n case \"config_room\":\n config_room(payload);\n break; \n case \"ist\":\n payload = parseFloat(payload);\n context.set(\"ist\", payload);\n if (context.get(\"min\") === 0 && context.get(\"max\") === 0){\n reset();\n } \n ist(payload);\n break;\n case \"switchit\":\n switchit(payload);\n break; \n case \"reset\":\n reset();\n break; \n default:\n return null;\n}\nreturn null;\n\n//--------\n\nfunction soll (){\n context.set (\"soll\",msg.payload);\n t = \"soll initialisiert mit \" + msg.payload + \"Grad C\";\n node.status({fill:\"green\",shape:\"dot\",text:t}); \n return; \n}\n\n//--------\n\nfunction config_hys(){\n context.set (\"h_low\", msg.payload.hys_low);\n context.set (\"h_high\", msg.payload.hys_high);\n node.status({fill:\"green\",shape:\"dot\",text:\"Hystereris initialisiert\"}); \n return;\n}\n\n//--------\n\nfunction config_boost(){\n let dauer = msg.payload.dauer * 1000 * 60;\n context.set (\"dauer\", dauer);\n context.set (\"anhebung\", msg.payload.anhebung);\n let t = \"boost: \" + msg.payload.anhebung + \" Grad C \" + \"fĂĽr \" + msg.payload.dauer + \" min\";\n node.status({fill:\"green\",shape:\"dot\",text:t}); \n return null;\n}\n\n//--------\n\nfunction config_room(payload){\n context.set (\"room\", payload);\n let t = \"Room: \" + payload;\n node.status({fill:\"green\",shape:\"dot\",text:t});\n msg.topic = \"room\";\n msg.payload = payload;\n node.send(msg); \n return null;\n}\n\n//--------\nfunction ist(payload){\n minmax(payload);\n timeString();\n timeStamp();\n let c = context.get(\"counter\");\n c++;\n context.set(\"counter\", c);\n let ist = payload;\n let soll = context.get(\"soll\");\n let delta = ist - soll;\n msg.topic = \"soll\";\n msg.payload = 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switchit(onoff){\n msg.payload = onoff;\n node.send(msg);\n if (onoff === \"on\"){\n context.set (\"boost\", true);\n msg.topic = \"soll\";\n msg.payload = boost_on();\n node.send(msg);\n myTimeout = setTimeout(boost_off,context.get(\"dauer\"));\n context.set(\"myTimeout\", myTimeout);\n }\n else if (onoff === \"off\"){\n context.set (\"boost\", false);\n clearTimeout(context.get(\"myTimeout\"));\n msg.topic = \"soll\";\n msg.payload = context.get(\"soll\");\n node.send(msg);\n }\n return; \n}\n\n//--------\n\nfunction boost_on(){\n let soll_prev = context.get(\"soll\");\n let soll_boost = soll_prev + context.get(\"anhebung\");\n let dauer = context.get(\"dauer\");\n node.status({fill:\"red\",shape:\"dot\",text:\"soll:\" + soll_boost + \" fĂĽr \" + dauer/1000/60 + \" min\"}); \n return soll_boost; \n}\n\nfunction boost_off(){\n msg.payload = context.get(\"soll\");\n node.status({fill:\"green\",shape:\"dot\",text:\"soll:\" + msg.payload}); \n node.send(msg); \n 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