前回に引き続き、Node-REDからBACnetでCoolMasterの設定温度を変更する方法を紹介。
YABEからCoolMasterの設定温度を変更したWireSharkパケット
| 項目 | 内容 |
|---|---|
| 送信元IP | 192.168.1.14（Node-REDやBACnetクライアント） |
| 宛先IP | 192.168.1.100（BACnetデバイス） |
| 送信元/宛先ポート | 63848 → 47808（UDPポート。47808がBACnet/IPのデフォルト） |
| BVLC Function | Original-Unicast-NPDU（単一デバイス宛） |
| APDU Type | Confirmed Request（応答が必要） |
| Invoke ID | 27（リクエストとレスポンスの照合用） |
| Service Choice | WriteProperty（15） |
| 対象オブジェクト | analog-value, Instance=256 |
| 書き込み先 | present-value（85） |
| 書き込み値 | real型, 値=25 |
| Priority | 16（BACnet Priority Arrayで最も低い優先度） |
こちらはNPDUの値。
| 項目 | 内容 |
|---|---|
| 送信元IP | 192.168.1.14（Node-REDやBACnetクライアント） |
| 宛先IP | 192.168.1.100（BACnetデバイス） |
| 送信元ポート | 63848（動的割り当て） |
| 宛先ポート | 47808（BACnet/IPの標準ポート） |
| BVLC Function | Original-Unicast-NPDU（0x0a） |
| APDU Type | Confirmed-REQ（0、応答が必要な要求） |
| Service Choice | WriteProperty（15） |
| ターゲットオブジェクト | analog-value, 256 |
| プロパティ | present-value（85） |
| 書き込み値 | 25（Real型） |
| Application Tag | 4（Real型） |
| Priority | 16（デフォルト優先度） |
これはAPDUの値です。
Node-REDからBACnetでCoolMasterの設定温度を変更する
このようにValueに設定したい温度を入力すると設定できます。
設定温度をValueで渡すにはこのようにします。
[{"id":"873493c9214835f0","type":"BACnet-Write","z":"11b5d970f1ab28c1","name":"","objectType":"2","instance":"d6dff7e9f9703782","valueTag":"4","valueValue":"24","propertyId":"85","priority":"16","device":"54de1b76e537f00b","server":"cd9b93738b4a729c","multipleWrite":false,"x":460,"y":1280,"wires":[["4709806a326ccec7"]]},{"id":"4dfad23d1b17b1ab","type":"inject","z":"11b5d970f1ab28c1","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":280,"y":1200,"wires":[["873493c9214835f0"]]},{"id":"4709806a326ccec7","type":"debug","z":"11b5d970f1ab28c1","name":"debug 1","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":580,"y":1380,"wires":[]},{"id":"455052713aafe0ef","type":"function","z":"11b5d970f1ab28c1","name":"Format Payload","func":"msg.payload = {\n values: [\n {\n type: 4,\n value: msg.payload\n }\n ]\n};\nreturn msg;","outputs":1,"timeout":"","noerr":0,"initialize":"","finalize":"","libs":[],"x":300,"y":1360,"wires":[["873493c9214835f0"]]},{"id":"5400c9442eb17fef","type":"inject","z":"11b5d970f1ab28c1","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"25","payloadType":"num","x":110,"y":1300,"wires":[["455052713aafe0ef"]]},{"id":"2751e5c7f387705a","type":"inject","z":"11b5d970f1ab28c1","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"26","payloadType":"num","x":110,"y":1400,"wires":[["455052713aafe0ef"]]},{"id":"d6dff7e9f9703782","type":"BACnet-Instance","name":"SetTemp","instanceAddress":"256"},{"id":"54de1b76e537f00b","type":"BACnet-Device","name":"CoolMaster","deviceAddress":"192.168.1.100"},{"id":"cd9b93738b4a729c","type":"BACnet-Client","name":"PC(Node-RED)","adpuTimeout":"6000","port":"47808","interface":"","broadcastAddress":"192.168.1.14"}]
functionノードの中のtypeを4にしてmsg.payloadで設定温度を数値で送れば大丈夫です。
まとめ
以上、Node-REDからBACnetでCoolMasterの設定温度を変更する方法を紹介しました。