KNX Multi Routing (sample)


This sample shows how to bridge two or more KNX Ultimate gateways by forwarding RAW telegram objects through Node-RED.

For the full node reference see:

Bridge two gateways (A โ†” B) with Router Filter

Copy this code and paste it into your flow

View code > Edit the two `knxUltimate-config` nodes at the bottom of the flow (Gateway A and Gateway B). ```json [ { "id": "tab_knx_mr_sample", "type": "tab", "label": "KNX Multi Routing sample", "disabled": false, "info": "" }, { "id": "cmt_knx_mr_1", "type": "comment", "z": "tab_knx_mr_sample", "name": "Bridge two KNX Ultimate gateways (A โ†” B) using RAW telegram objects + Router Filter.", "info": "", "x": 390, "y": 40, "wires": [] }, { "id": "mr_gateway_a", "type": "knxUltimateMultiRouting", "z": "tab_knx_mr_sample", "server": "cfg_knx_mr_a", "name": "Gateway A (out/in)", "outputtopic": "GW-A", "dropIfSameGateway": true, "x": 170, "y": 140, "wires": [ [ "rf_a_to_b" ] ] }, { "id": "mr_gateway_b", "type": "knxUltimateMultiRouting", "z": "tab_knx_mr_sample", "server": "cfg_knx_mr_b", "name": "Gateway B (out/in)", "outputtopic": "GW-B", "dropIfSameGateway": true, "x": 930, "y": 140, "wires": [ [ "rf_b_to_a" ] ] }, { "id": "rf_a_to_b", "type": "knxUltimateRouterFilter", "z": "tab_knx_mr_sample", "name": "A โ†’ B filter", "allowWrite": true, "allowResponse": true, "allowRead": true, "gaMode": "off", "gaPatterns": "", "srcMode": "off", "srcPatterns": "", "rewriteGA": true, "gaRewriteRules": "0/0/* => 2/0/*", "rewriteSource": false, "srcRewriteRules": "", "x": 390, "y": 140, "wires": [ [ "mr_gateway_b" ], [ "dbg_mr_drop_a_to_b" ] ] }, { "id": "rf_b_to_a", "type": "knxUltimateRouterFilter", "z": "tab_knx_mr_sample", "name": "B โ†’ A filter", "allowWrite": true, "allowResponse": true, "allowRead": true, "gaMode": "off", "gaPatterns": "", "srcMode": "off", "srcPatterns": "", "rewriteGA": false, "gaRewriteRules": "", "rewriteSource": false, "srcRewriteRules": "", "x": 710, "y": 140, "wires": [ [ "mr_gateway_a" ], [ "dbg_mr_drop_b_to_a" ] ] }, { "id": "dbg_mr_drop_a_to_b", "type": "debug", "z": "tab_knx_mr_sample", "name": "Dropped Aโ†’B", "active": true, "tosidebar": true, "console": false, "tostatus": false, "complete": "payload.knxRouterFilter", "targetType": "msg", "x": 410, "y": 200, "wires": [] }, { "id": "dbg_mr_drop_b_to_a", "type": "debug", "z": "tab_knx_mr_sample", "name": "Dropped Bโ†’A", "active": true, "tosidebar": true, "console": false, "tostatus": false, "complete": "payload.knxRouterFilter", "targetType": "msg", "x": 710, "y": 200, "wires": [] }, { "id": "cfg_knx_mr_a", "type": "knxUltimate-config", "z": "", "host": "224.0.23.12", "port": "3671", "physAddr": "15.15.201", "suppressACKRequest": false, "csv": "", "KNXEthInterface": "Auto", "KNXEthInterfaceManuallyInput": "", "autoReconnect": "yes" }, { "id": "cfg_knx_mr_b", "type": "knxUltimate-config", "z": "", "host": "224.0.23.12", "port": "3671", "physAddr": "15.15.202", "suppressACKRequest": false, "csv": "", "KNXEthInterface": "Auto", "KNXEthInterfaceManuallyInput": "", "autoReconnect": "yes" } ] ```

KNX/IP tunneling server (standalone) - Server KNX/IP mode

This sample starts a KNXnet/IP tunneling server (UDP) using knxUltimateMultiRouting in Server KNX/IP mode.

You can also import it directly from the repository examples:

  • examples/KNX Multi Routing - KNXIP Server.json
View code ```json [ { "id": "tab_knx_mr_srv_sample", "type": "tab", "label": "KNX/IP Server (MultiRouting)", "disabled": false, "info": "" }, { "id": "cmt_knx_mr_srv_1", "type": "comment", "z": "tab_knx_mr_srv_sample", "name": "Use knxUltimateMultiRouting as a standalone KNXnet/IP Tunneling Server (UDP).", "info": "1) Deploy.\n2) Configure your KNX/IP tunneling client to connect to this Node-RED host on tunnelListenPort (default 3671).\n3) Watch the RAW telegrams in the Debug node.\n\nTo test the INPUT side: after at least one telegram is received, click the inject node \"Replay last\" to inject the last received telegram back to connected tunneling client(s).", "x": 430, "y": 40, "wires": [] }, { "id": "mr_tunnel_server", "type": "knxUltimateMultiRouting", "z": "tab_knx_mr_srv_sample", "mode": "server", "server": "", "name": "KNX/IP Tunneling Server", "outputtopic": "", "dropIfSameGateway": true, "tunnelListenHost": "0.0.0.0", "tunnelListenPort": "3671", "tunnelAdvertiseHost": "", "tunnelAssignedIndividualAddress": "15.15.255", "tunnelGatewayId": "knxip-server", "tunnelMaxSessions": "1", "x": 240, "y": 160, "wires": [ [ "fn_cache_last", "dbg_tunnel_raw" ] ] }, { "id": "dbg_tunnel_raw", "type": "debug", "z": "tab_knx_mr_srv_sample", "name": "RAW from tunneling client", "active": true, "tosidebar": true, "console": false, "tostatus": false, "complete": "payload.knx", "targetType": "msg", "x": 520, "y": 160, "wires": [] }, { "id": "fn_cache_last", "type": "function", "z": "tab_knx_mr_srv_sample", "name": "Cache last telegram", "func": "try {\n if (msg && msg.payload && msg.payload.knx) {\n flow.set('last_knx_raw', msg.payload.knx);\n }\n} catch (e) {}\nreturn null;", "outputs": 0, "noerr": 0, "initialize": "", "finalize": "", "libs": [], "x": 500, "y": 220, "wires": [] }, { "id": "inj_replay_last", "type": "inject", "z": "tab_knx_mr_srv_sample", "name": "Replay last", "props": [ { "p": "payload" } ], "repeat": "", "crontab": "", "once": false, "onceDelay": 0.1, "topic": "", "payload": "", "payloadType": "date", "x": 170, "y": 300, "wires": [ [ "fn_replay_last" ] ] }, { "id": "fn_replay_last", "type": "function", "z": "tab_knx_mr_srv_sample", "name": "Build replay msg", "func": "const last = flow.get('last_knx_raw');\nif (!last) {\n node.warn('No cached telegram yet. Generate one from a tunneling client first.');\n return null;\n}\n\n// IMPORTANT:\n// - Server mode expects msg.payload.knx.cemi.hex (or msg.payload.knx.cemi) to be present.\n// - Do NOT attach knxMultiRouting.gateway.id here, otherwise dropIfSameGateway may discard it.\nreturn {\n topic: last.destination || '',\n payload: {\n knx: last\n }\n};", "outputs": 1, "noerr": 0, "initialize": "", "finalize": "", "libs": [], "x": 360, "y": 300, "wires": [ [ "mr_tunnel_server", "dbg_replay" ] ] }, { "id": "dbg_replay", "type": "debug", "z": "tab_knx_mr_srv_sample", "name": "Replay msg", "active": true, "tosidebar": true, "console": false, "tostatus": false, "complete": "true", "targetType": "full", "x": 520, "y": 300, "wires": [] } ] ```

Tips

  • Keep Drop messages already tagged for this gateway enabled on each routing node to prevent simple loops.
  • Add GA/source filtering and rewrite rules inside KNX Router Filter.