Moin Zusammen,
Ich habe mir ein kleines Oled Display in den Van gezimmert, das immer aktiv ist. Ich hatte vorher so einen China Shunt, wo ich immer mit einen Blick sehen konnte wie voll die Batterie ist und irgendwie hab ich das vermisst.
Das Oled zeigt jetzt nicht nur den SOC an, sondern Innen Temperatur , Spannung , Strom und Solar Leistung. Wenn kein Solar ertrag vorhanden ist, dann wird der Tagesertrag (Victron) angezeigt. Zusätzlich wird angezeigt wenn ein Timer gesetzt ist (Heater oder Boiler), ob einen Heizung Aktiv ist, Bolier aktiviert (Boiler Control), Wasserpumpe (Relay), Wechselrichter (Relay) und ein Relay Symbol für was auch immer. Das Ganze kann im UI angepasst werden. Verwendetes Display: 1,3 Zoll OLED Display mit I2C 128 x 64 Pixel Modul Binghe 3 Stück 1,3 Zoll OLED Display, I2C OLED Bildschirm Anzeigemodul mit weißen Zeichen 1106 Chip kompatibel mit Arduino Raspberry Pi: Amazon.de: Gewerbe, Industrie & Wissenschaft
UI:
Display im VAN:
Zur Installation:
OLED Pins sind auf der Platine gekennzeichnet. Am Core kann man gut über das Specshet die Pins vom i2c zuordnen. Oder über Multiout anklemmen. Einfach 1 zu 1 verbinden (3,3v, SDA,SCL,GND)
In Nodered am besten erst die Palette installieren: node-red-contrib-oled-i2c
https://flows.nodered.org/node/node-red-contrib-oled-i2c
Ins Verzeichnis pekaway ein ordner erstellen mit oled und dort die Symbole (PNG) einfügen.
(Bei 12x12 Pixel schöne Symbole zu erstellen hat einiges an Zeit gekostet 
)
12x12clean.png 
12x13clean.png 
12x13heater.png 
ac.png 
boileron.png 
relay.png 
timer.png 
water.png 
Wenn die Symbole nicht vorhanden sind, dann bekommt ihr Probleme beim Anzeigen des Displays.
Ganz zum Schluss noch das Skript in Nodered einfügen:
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in","z":"551eaab0c2c1a9cf","g":"2a1cc0e0b7e76aea","name":"","topic":"pkw/cmnd/#","qos":"2","datatype":"auto-detect","broker":"0ddb07c65cbb68bc","nl":false,"rap":true,"rh":0,"inputs":0,"x":340,"y":340,"wires":[["ce3b6114fb191494"]]},{"id":"dd02317ddcf854ea","type":"Image","z":"551eaab0c2c1a9cf","g":"2a1cc0e0b7e76aea","name":"","display":"a0cfb356680b468b","x":940,"y":320,"wires":[]},{"id":"702137a054172cfd","type":"function","z":"551eaab0c2c1a9cf","g":"2a1cc0e0b7e76aea","name":"Symbol AC","func":"// Payload normalisieren (String zu Kleinbuchstaben, Boolean direkt übernehmen)\nlet val = (typeof msg.payload === \"string\") ? msg.payload.toLowerCase() : msg.payload;\n\nlet imagePath;\nif (val === true || val === \"on\") {\n imagePath = \"pekaway/oled/ac.png\";\n} else if (val === false || val === \"off\") {\n imagePath = \"pekaway/oled/12x12clean.png\";\n} else {\n // Unbekannter Wert → Nachricht verwerfen\n return null;\n}\n\n// Change-Check mit Flow-Variable\nlet oldImage = flow.get(\"OLED_acImg\") || \"\";\nif (imagePath !== oldImage) {\n flow.set(\"OLED_acImg\", imagePath);\n\n msg.payload = {\n \"image\": imagePath,\n \"x\": 54,\n \"y\": 1,\n \"clear\": false,\n \"animated\": false\n };\n\n return msg;\n}\n\nreturn null; // nichts senden, wenn keine Änderung\n","outputs":1,"timeout":0,"noerr":0,"initialize":"","finalize":"","libs":[],"x":770,"y":340,"wires":[["dd02317ddcf854ea"]]},{"id":"3b092c099decfa67","type":"function","z":"551eaab0c2c1a9cf","g":"2a1cc0e0b7e76aea","name":"Symbol Water","func":"// Payload normalisieren (String zu Kleinbuchstaben, Boolean direkt übernehmen)\nlet val = (typeof msg.payload === \"string\") ? msg.payload.toLowerCase() : msg.payload;\n\nlet imagePath;\nif (val === true || val === \"on\") {\n imagePath = \"pekaway/oled/water.png\";\n} else if (val === false || val === \"off\") {\n imagePath = \"pekaway/oled/12x12clean.png\";\n} else {\n // Unbekannter Wert → Nachricht verwerfen\n return null;\n}\n\n// Change-Check mit Flow-Variable\nlet oldImage = flow.get(\"OLED_waterImg\") || \"\";\nif (imagePath !== oldImage) {\n flow.set(\"OLED_waterImg\", imagePath);\n\n msg.payload = {\n \"image\": imagePath,\n \"x\": 42,\n \"y\": 1,\n \"clear\": false,\n \"animated\": false\n };\n\n return msg;\n}\n\nreturn null; // nichts senden, wenn keine Änderung\n","outputs":1,"timeout":0,"noerr":0,"initialize":"","finalize":"","libs":[],"x":780,"y":380,"wires":[["dd02317ddcf854ea"]]},{"id":"7564774aaec48d37","type":"function","z":"551eaab0c2c1a9cf","g":"2a1cc0e0b7e76aea","name":"Symbol Relay","func":"// Payload normalisieren (String zu Kleinbuchstaben, Boolean direkt übernehmen)\nlet val = (typeof msg.payload === \"string\") ? msg.payload.toLowerCase() : msg.payload;\n\nlet imagePath;\nif (val === true || val === \"on\") {\n imagePath = \"pekaway/oled/relay.png\";\n} else if (val === false || val === \"off\") {\n imagePath = \"pekaway/oled/12x12clean.png\";\n} else {\n // Unbekannter Wert → Nachricht verwerfen\n return null;\n}\n\n// Change-Check mit Flow-Variable\nlet oldImage = flow.get(\"OLED_relayImg\") || \"\";\nif (imagePath !== oldImage) {\n flow.set(\"OLED_relayImg\", imagePath);\n\n msg.payload = {\n \"image\": imagePath,\n \"x\": 66,\n \"y\": 1,\n \"clear\": false,\n \"animated\": false\n };\n\n return msg;\n}\n\nreturn null; // nichts senden, wenn keine Änderung\n","outputs":1,"timeout":0,"noerr":0,"initialize":"","finalize":"","libs":[],"x":780,"y":420,"wires":[["dd02317ddcf854ea"]]},{"id":"353f232efadf6a62","type":"function","z":"551eaab0c2c1a9cf","g":"2a1cc0e0b7e76aea","name":"global boilercontrol","func":"//skript by Wulle on Tour\n// Flow-Variable lesen\nlet isBoilerOn = global.get(\"boilertemp_control\");\n\n// Bildpfad wählen\nlet imagePath = isBoilerOn === true\n ? \"pekaway/oled/boileron.png\"\n : \"pekaway/oled/12x12clean.png\";\n\n// Change-Check mit Flow-Variable\nlet oldImage = flow.get(\"OLED_boilerImg\") || \"\";\nif (imagePath !== oldImage) {\n flow.set(\"OLED_boilerImg\", imagePath);\n\n msg.payload = {\n \"image\": imagePath,\n \"x\": 29,\n \"y\": 1,\n \"clear\": false,\n \"animated\": false\n };\n\n return msg;\n}\n\nreturn null; // nichts senden, wenn keine Änderung\n","outputs":1,"timeout":0,"noerr":0,"initialize":"","finalize":"","libs":[],"x":600,"y":300,"wires":[["dd02317ddcf854ea"]]},{"id":"788a8cd061e253c1","type":"function","z":"551eaab0c2c1a9cf","g":"2a1cc0e0b7e76aea","name":"global heater","func":"// Liste der zu prüfenden Flow-Variablen\nconst vars = [\n \"HeaterToggle_autoterm1\",\n \"HeaterToggle_autoterm2\",\n \"HeaterToggle\",\n \"HeaterToggle_truma\"\n];\n\n// Prüfen, ob mindestens eine auf true steht\nlet heaterOn = vars.some(v => global.get(v) === true);\n\n// Bildpfad wählen\nlet imagePath = heaterOn\n ? \"pekaway/oled/12x13heater.png\"\n : \"pekaway/oled/12x13clean.png\";\n\n// Change-Check mit Flow-Variable\nlet oldImage = flow.get(\"OLED_heaterImg\") || \"\";\nif (imagePath !== oldImage) {\n flow.set(\"OLED_heaterImg\", imagePath);\n\n msg.payload = {\n \"image\": imagePath,\n \"x\": 15,\n \"y\": 1,\n \"clear\": false,\n \"animated\": false\n };\n\n return msg;\n}\n\nreturn null; // nichts senden, wenn keine Änderung\n","outputs":1,"timeout":0,"noerr":0,"initialize":"","finalize":"","libs":[],"x":580,"y":260,"wires":[["dd02317ddcf854ea"]]},{"id":"fdc1acd1bde4df19","type":"function","z":"551eaab0c2c1a9cf","g":"2a1cc0e0b7e76aea","name":"global timer","func":"// Liste der zu prüfenden Flow-Variablen\nconst vars = [\n \"truma_watertimeronoff\",\n \"truma_heattimeronoff\",\n \"heattimeronoff_autoterm1\",\n \"heattimeronoff_autoterm2\",\n \"heattimeronoff\",\n \"boiler_timeronoff\"\n];\n\n// Prüfen, ob mindestens eine auf true steht\nlet heaterOn = vars.some(v => global.get(v) === true);\n\n// Bildpfad wählen\nlet imagePath = heaterOn \n ? \"pekaway/oled/timer.png\"\n : \"pekaway/oled/12x12clean.png\";\n\n// Change-Check mit Flow-Variable\nlet oldImage = flow.get(\"OLED_timerImg\") || \"\";\nif (imagePath !== oldImage) {\n flow.set(\"OLED_timerImg\", imagePath);\n\n msg.payload = {\n \"image\": imagePath,\n \"x\": 1,\n \"y\": 1,\n \"clear\": false,\n \"animated\": false\n };\n\n return msg;\n}\n\nreturn null; // nichts senden, wenn keine Änderung\n","outputs":1,"timeout":0,"noerr":0,"initialize":"","finalize":"","libs":[],"x":580,"y":220,"wires":[["dd02317ddcf854ea"]]},{"id":"9d56e455c0c53d52","type":"ui_ui_control","z":"551eaab0c2c1a9cf","g":"2a1cc0e0b7e76aea","name":"","events":"change","x":170,"y":820,"wires":[["0fbeb914d7946fe4"]]},{"id":"0fbeb914d7946fe4","type":"function","z":"551eaab0c2c1a9cf","g":"2a1cc0e0b7e76aea","name":"check tab","func":"if (msg.payload == \"change\" && msg.name == \"Devices\") {\n return msg;\n}","outputs":1,"timeout":0,"noerr":0,"initialize":"","finalize":"","libs":[],"x":330,"y":820,"wires":[["23788304fc7f925f","0f807687ab30f637"]]},{"id":"de5aa5e567627831","type":"function","z":"551eaab0c2c1a9cf","g":"2a1cc0e0b7e76aea","name":"i2c check","func":"//skript by Wulle on Tour\n// globale Variable holen\nlet i2c = global.get(\"i2c_detect\");\n\n// prüfen ob vorhanden und ob 0x3c drin ist\nif (i2c && i2c.includes(\"0x3c\")) {\n return msg; // Nachricht weiterleiten\n} else {\n return null; // Nachricht blockieren\n}\n","outputs":1,"timeout":0,"noerr":0,"initialize":"","finalize":"","libs":[],"x":390,"y":200,"wires":[["75400be909e424e3","63cf51b0acf73742","7bf38810c9fd4611","27e38ace3d0b160d","fdc1acd1bde4df19","788a8cd061e253c1","353f232efadf6a62","0d9f82780b606ac5","214051e4617af0c0","e209e75b36b3c481"]]},{"id":"ce3b6114fb191494","type":"function","z":"551eaab0c2c1a9cf","g":"2a1cc0e0b7e76aea","name":"i2c check","func":"// globale Variable holen\nlet i2c = global.get(\"i2c_detect\");\n\n// prüfen ob vorhanden und ob 0x3c drin ist\nif (i2c && i2c.includes(\"0x3c\")) {\n return msg; // Nachricht weiterleiten\n} else {\n return null; // Nachricht blockieren\n}\n","outputs":1,"timeout":0,"noerr":0,"initialize":"","finalize":"","libs":[],"x":370,"y":400,"wires":[["0d9f82780b606ac5","214051e4617af0c0","e209e75b36b3c481"]]},{"id":"725b00506e8575bc","type":"function","z":"551eaab0c2c1a9cf","g":"2a1cc0e0b7e76aea","name":"Switch Check filter","func":"if (msg.payload !== undefined && msg.payload !== null && msg.socketid) {\n return msg; // Nachricht weitergeben\n} else {\n return null; // Nachricht verwerfen\n}\n","outputs":1,"timeout":0,"noerr":0,"initialize":"","finalize":"","libs":[],"x":680,"y":660,"wires":[["78d140fda3d9a27f"]]},{"id":"7ff2294cbe958a81","type":"change","z":"551eaab0c2c1a9cf","g":"2a1cc0e0b7e76aea","name":"boolean","rules":[{"t":"change","p":"payload","pt":"msg","from":"true","fromt":"str","to":"true","tot":"bool"},{"t":"change","p":"payload","pt":"msg","from":"false","fromt":"str","to":"false","tot":"bool"}],"action":"","property":"","from":"","to":"","reg":false,"x":510,"y":720,"wires":[["aba78d8f4e513a90"]]},{"id":"78d140fda3d9a27f","type":"file","z":"551eaab0c2c1a9cf","g":"2a1cc0e0b7e76aea","name":"Save Dimmed","filename":"pekaway/userflow/OLEDDimmed","filenameType":"str","appendNewline":false,"createDir":true,"overwriteFile":"true","encoding":"none","x":890,"y":660,"wires":[[]]},{"id":"9bd23afae3653e6a","type":"file in","z":"551eaab0c2c1a9cf","g":"2a1cc0e0b7e76aea","name":"Read 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gesetzt!`);\n msg.payload = false;\n } else {\n msg.payload = value; // true oder false\n }\n}\n\nreturn msg;\n","outputs":1,"timeout":0,"noerr":0,"initialize":"","finalize":"","libs":[],"x":590,"y":340,"wires":[["702137a054172cfd"]]},{"id":"214051e4617af0c0","type":"function","z":"551eaab0c2c1a9cf","g":"2a1cc0e0b7e76aea","name":"Water filter","func":"// Name der Flow-Variable auslesen\nlet varName = flow.get(\"OLED_Waterpumpaktiv\");\n\nif (varName === undefined) {\n node.warn(\"Waterpumpaktiv ist nicht gesetzt!\");\n msg.payload = false;\n} else {\n // Wert der globalen Variable auslesen\n let value = global.get(varName);\n if (value === undefined) {\n node.warn(`Globale Variable '${varName}' ist nicht gesetzt!`);\n msg.payload = false;\n } else {\n msg.payload = value; // true oder false\n }\n}\n\nreturn msg;\n","outputs":1,"timeout":0,"noerr":0,"initialize":"","finalize":"","libs":[],"x":590,"y":380,"wires":[["3b092c099decfa67"]]},{"id":"e209e75b36b3c481","type":"function","z":"551eaab0c2c1a9cf","g":"2a1cc0e0b7e76aea","name":"Relay filter","func":"// Name der Flow-Variable auslesen\nlet varName = flow.get(\"OLED_relayaktiv\");\n\nif (varName === undefined) {\n node.warn(\"relayaktiv ist nicht gesetzt!\");\n msg.payload = false;\n} else {\n // Wert der globalen Variable auslesen\n let value = global.get(varName);\n if (value === undefined) {\n node.warn(`Globale Variable '${varName}' ist nicht gesetzt!`);\n msg.payload = false;\n } else {\n msg.payload = value; // true oder false\n }\n}\n\nreturn msg;\n","outputs":1,"timeout":0,"noerr":0,"initialize":"","finalize":"","libs":[],"x":590,"y":420,"wires":[["7564774aaec48d37"]]},{"id":"035f3b4d9a3f496b","type":"change","z":"551eaab0c2c1a9cf","g":"2a1cc0e0b7e76aea","name":"Clean FLOW","rules":[{"t":"set","p":"OLED_ambientTemp","pt":"flow","to":"\"\"","tot":"str"},{"t":"set","p":"OLED_amps","pt":"flow","to":"\"\"","tot":"str"},{"t":"set","p":"OLED_pv","pt":"flow","to":"\"\"","tot":"str"},{"t":"set","p":"OLED_soc","pt":"flow","to":"\"\"","tot":"str"},{"t":"set","p":"OLED_volt","pt":"flow","to":"\"\"","tot":"str"},{"t":"set","p":"OLED_timerImg","pt":"flow","to":"\"\"","tot":"str"},{"t":"set","p":"OLED_heaterImg","pt":"flow","to":"\"\"","tot":"str"},{"t":"set","p":"OLED_boilerImg","pt":"flow","to":"\"\"","tot":"str"},{"t":"set","p":"OLED_acImg","pt":"flow","to":"\"\"","tot":"str"},{"t":"set","p":"OLED_waterImg","pt":"flow","to":"\"\"","tot":"str"},{"t":"set","p":"OLED_relayImg","pt":"flow","to":"\"\"","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":590,"y":520,"wires":[[]]},{"id":"a0cfb356680b468b","type":"oled-config","name":"oled","width":"128","height":"64","address":"0x3c","driver":"SH1106","i2cBus":"1"},{"id":"efeaf4a8803d0564","type":"ui_group","name":"OLED I2C 1,3 Zoll","tab":"3b6d81e4a75b05e9","order":4,"disp":true,"width":6,"collapse":true,"className":""},{"id":"0ddb07c65cbb68bc","type":"mqtt-broker","name":"","broker":"http://localhost","port":"1883","clientid":"","autoConnect":true,"usetls":false,"protocolVersion":"4","keepalive":"60","cleansession":true,"birthTopic":"","birthQos":"0","birthPayload":"","birthMsg":{},"closeTopic":"","closeQos":"0","closePayload":"","closeMsg":{},"willTopic":"","willQos":"0","willPayload":"","willMsg":{},"sessionExpiry":""},{"id":"3b6d81e4a75b05e9","type":"ui_tab","name":"Devices","icon":"","order":30,"disabled":false,"hidden":true}]
Das sollte es gewesen sein.
Bei richtig Anschließen des Display, sollte es beim I2C Scan die Adresse “0x3c” anzeigen.
Driver: SH1106 (falls dieser nicht mit kommt)
Gruß Wulle
