Hi, I tried to query a U64 Modbus value for the first time. But no matter how I configure the buffer parser, there is always only one error. What am I missing? [grafik] [grafik] [grafik] [grafik]

[image] Becker: better Yes. [image] [{"id":"3d6370f2.5997e","type":"inject","z":"64ce1d00.d049e4","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":540,"y":580,"wires":[["e0e5a7e.f181b58"]]},{"id":"e0e5a7e.f181b58","type":"function","z":"64ce1d00.d049e4","name":"simulated modbus data","func":"\nreturn {\"topic\":\"cd1d4476.573438\",\"messageId\":\"5fdcba413f27802973d6dffb\",\"payload\":[0,0,1,3501,0,0,0,52479],\"queueLengthByUnitId\":{\"unitId\":3,\"queueLength\":0},\"queueUnitId\":3,\"unitId\":3,\"modbusRequest\":{\"value\":{\"IS\":5.726},\"unitid\":\"3\",\"fc\":4,\"address\":\"31397\",\"quantity\":\"8\",\"messageId\":\"5fdcba413f27802973d6dffb\"},\n\"responseBuffer\":{\"data\":[0,0,1,3501,0,0,0,52479],\n\"buffer\":Buffer.from([0,0,0,0,0,1,13,173,0,0,0,0,0,0,204,255])},\"_msgid\":\"c93322b.3d7c5e\"};","outputs":1,"noerr":0,"initialize":"","finalize":"","x":740,"y":580,"wires":[["cb154c41.9c237"]]},{"id":"cb154c41.9c237","type":"buffer-parser","z":"64ce1d00.d049e4","name":"using biguint64","data":"responseBuffer.buffer","dataType":"msg","specification":"spec","specificationType":"ui","items":[{"type":"biguint64be","name":"item1_64bit","offset":0,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"biguint64be","name":"item2_64bit","offset":8,"length":1,"offsetbit":0,"scale":"1","mask":""}],"swap1":"","swap2":"","swap3":"","swap1Type":"swap","swap2Type":"swap","swap3Type":"swap","msgProperty":"payload","msgPropertyType":"str","resultType":"keyvalue","resultTypeType":"output","multipleResult":false,"fanOutMultipleResult":false,"setTopic":true,"outputs":1,"x":960,"y":580,"wires":[["cf52ae85.b4a1c"]]},{"id":"cf52ae85.b4a1c","type":"debug","z":"64ce1d00.d049e4","name":"","active":true,"tosidebar":true,"console":false,"tostatus":true,"complete":"payload","targetType":"msg","statusVal":"payload","statusType":"auto","x":1130,"y":580,"wires":[]},{"id":"19a445e.c5b09ba","type":"inject","z":"64ce1d00.d049e4","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":540,"y":640,"wires":[["12fdf919.2a4cf7"]]},{"id":"12fdf919.2a4cf7","type":"function","z":"64ce1d00.d049e4","name":"simulated modbus data","func":"\nreturn {\"topic\":\"cd1d4476.573438\",\"messageId\":\"5fdcba413f27802973d6dffb\",\"payload\":[0,0,1,3501,0,0,0,52479],\"queueLengthByUnitId\":{\"unitId\":3,\"queueLength\":0},\"queueUnitId\":3,\"unitId\":3,\"modbusRequest\":{\"value\":{\"IS\":5.726},\"unitid\":\"3\",\"fc\":4,\"address\":\"31397\",\"quantity\":\"8\",\"messageId\":\"5fdcba413f27802973d6dffb\"},\n\"responseBuffer\":{\"data\":[0,0,1,3501,0,0,0,52479],\n\"buffer\":Buffer.from([0,0,0,0,0,1,13,173,0,0,0,0,0,0,204,255])},\"_msgid\":\"c93322b.3d7c5e\"};","outputs":1,"noerr":0,"initialize":"","finalize":"","x":740,"y":640,"wires":[["ad16f77d.357018"]]},{"id":"ad16f77d.357018","type":"buffer-parser","z":"64ce1d00.d049e4","name":"using uint32","data":"responseBuffer.buffer","dataType":"msg","specification":"spec","specificationType":"ui","items":[{"type":"uint32be","name":"item1_32bit","offset":4,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"uint32be","name":"item2_32bit","offset":12,"length":1,"offsetbit":0,"scale":"1","mask":""}],"swap1":"","swap2":"","swap3":"","swap1Type":"swap","swap2Type":"swap","swap3Type":"swap","msgProperty":"payload","msgPropertyType":"str","resultType":"keyvalue","resultTypeType":"output","multipleResult":false,"fanOutMultipleResult":false,"setTopic":true,"outputs":1,"x":950,"y":640,"wires":[["2993872d.c81998"]]},{"id":"2993872d.c81998","type":"debug","z":"64ce1d00.d049e4","name":"","active":true,"tosidebar":true,"console":false,"tostatus":true,"complete":"payload","targetType":"msg","statusVal":"payload","statusType":"auto","x":1130,"y":640,"wires":[]},{"id":"e9ef3a7b.bb6f38","type":"inject","z":"64ce1d00.d049e4","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":540,"y":700,"wires":[["e66af765.b1ea08"]]},{"id":"e66af765.b1ea08","type":"function","z":"64ce1d00.d049e4","name":"simulated modbus data","func":"\nreturn {\"topic\":\"cd1d4476.573438\",\"messageId\":\"5fdcba413f27802973d6dffb\",\"payload\":[0,0,1,3501,0,0,0,52479],\"queueLengthByUnitId\":{\"unitId\":3,\"queueLength\":0},\"queueUnitId\":3,\"unitId\":3,\"modbusRequest\":{\"value\":{\"IS\":5.726},\"unitid\":\"3\",\"fc\":4,\"address\":\"31397\",\"quantity\":\"8\",\"messageId\":\"5fdcba413f27802973d6dffb\"},\n\"responseBuffer\":{\"data\":[0,0,1,3501,0,0,0,52479],\n\"buffer\":Buffer.from([0,0,0,0,0,1,13,173,0,0,0,0,0,0,204,255])},\"_msgid\":\"c93322b.3d7c5e\"};","outputs":1,"noerr":0,"initialize":"","finalize":"","x":740,"y":700,"wires":[["7c2868e7.df1b98"]]},{"id":"7c2868e7.df1b98","type":"buffer-parser","z":"64ce1d00.d049e4","name":"using 2xuint32","data":"responseBuffer.buffer","dataType":"msg","specification":"spec","specificationType":"ui","items":[{"type":"uint32be","name":"item1a_32bit","offset":0,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"uint32be","name":"item1b_32bit","offset":4,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"uint32be","name":"item2a_32bit","offset":8,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"uint32be","name":"item2b_32bit","offset":12,"length":1,"offsetbit":0,"scale":"1","mask":""}],"swap1":"","swap2":"","swap3":"","swap1Type":"swap","swap2Type":"swap","swap3Type":"swap","msgProperty":"payload","msgPropertyType":"str","resultType":"keyvalue","resultTypeType":"output","multipleResult":false,"fanOutMultipleResult":false,"setTopic":true,"outputs":1,"x":960,"y":700,"wires":[["70549f59.0ec38"]]},{"id":"9dbdb810.6117a8","type":"debug","z":"64ce1d00.d049e4","name":"","active":true,"tosidebar":true,"console":false,"tostatus":true,"complete":"payload","targetType":"msg","statusVal":"payload","statusType":"auto","x":1130,"y":760,"wires":[]},{"id":"70549f59.0ec38","type":"function","z":"64ce1d00.d049e4","name":"calc 64 bit from 2-32bit vals","func":"var hi1 = msg.payload.item1a_32bit << 32;\nvar lo1 = msg.payload.item1b_32bit;\nvar hi2 = msg.payload.item2a_32bit << 32;\nvar lo2 = msg.payload.item1b_32bit;\nmsg.payload.item1_calculated = hi1 + lo1;\nmsg.payload.item2_calculated = hi2 + lo2;\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":920,"y":760,"wires":[["9dbdb810.6117a8"]]}] NOTES: V1: just works if you have up-to-date NODEJS version (1st recommendation) V2: If the values are 32 bit max BUT ALSO < 2^53 then this work (values over 2^53 will become inaccurate due to JS limitation - that is why bigint was created)

Can you show us what you get from this (its a small flow built from your modbus data... [image] [{"id":"744c02e3.3e785c","type":"inject","z":"f0c54878.b7be68","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":1160,"y":80,"wires":[["61ef089f.2338a8"]]},{"id":"61ef089f.2338a8","type":"function","z":"f0c54878.b7be68","name":"modbus data","func":"\nreturn { \"topic\": \"bc57293c.b45d5\", \n\"messageId\": \"5fcd1a9b7eae09b6296c0167\", \n\"payload\": [0, 0, 0, 53199, 0, 0, 0, 46520], \n\"queueLengthByUnitId\": { \"unitId\": 3, \"queueLength\": 0 }, \n\"queueUnitId\": 3, \"unitId\": 3, \n\"modbusRequest\": { \n \"value\": { \"T3\": 28.8 }, \"unitid\": \"3\", \"fc\": 4, \"address\": \"31397\", \"quantity\": \"8\", \"messageId\": \"5fcd1a9b7eae09b6296c0167\" }, \"responseBuffer\": { \"data\": [0, 0, 0, 53199, 0, 0, 0, 46520],\n \"buffer\": Buffer.from([0, 0, 0, 0, 0, 0, 207, 207, 0, 0, 0, 0, 0, 0, 181, 184]) }, \n\"_msgid\": \"61620b69.6a03b4\" };","outputs":1,"noerr":0,"initialize":"","finalize":"","x":1170,"y":140,"wires":[["b0563f39.60a0d"]]},{"id":"b0563f39.60a0d","type":"buffer-parser","z":"f0c54878.b7be68","name":"","data":"responseBuffer.buffer","dataType":"msg","specification":"spec","specificationType":"ui","items":[{"type":"bigint64le","name":"bigint64le","offset":0,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"bigint64be","name":"bigint64be","offset":0,"length":1,"offsetbit":0,"scale":"1","mask":""}],"swap1":"","swap2":"","swap3":"","swap1Type":"swap","swap2Type":"swap","swap3Type":"swap","msgProperty":"payload","msgPropertyType":"str","resultType":"keyvalue","resultTypeType":"output","multipleResult":false,"fanOutMultipleResult":false,"setTopic":true,"outputs":1,"x":1190,"y":200,"wires":[["42c0eecc.55333"]]},{"id":"42c0eecc.55333","type":"debug","z":"f0c54878.b7be68","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":1220,"y":260,"wires":[]}]

TypeError: Cannot read property 'bind' of undefined :nauseated_face: :roll_eyes: whats wrong with my NR - I see, its working at your NR the OS is old, 9 (Stretch) :woozy_face:

hmmmm :thinking: Can you add a catch and link it to a debug node set to show complete message and paste the content of that msg in a reply please?

[image] [{"id":"87dc0eac.9baeb","type":"catch","z":"f0c54878.b7be68","name":"","scope":null,"uncaught":false,"x":1090,"y":360,"wires":[["62ec60f.62ed9a"]]},{"id":"62ec60f.62ed9a","type":"debug","z":"f0c54878.b7be68","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":1240,"y":360,"wires":[]}]

In this thread Nick mentions that reading 64bit ints from buffer was added in Node 12 [image] ModBus TCP Read 64-bit registers Industrial what version of nodejs are you using? at a command line terminal, enter node -v

It might be a factor but MDN says otherwise

maybe this ? v12 and v10.20 [image] Buffer | Node.js v15.3.0 Documentation

Not sure what you mean @UnborN If you select the V10 dropdown on the nodejs docs & look at API for node buffer it does support the bigint functions

got it: {"topic":"bc57293c.b45d5","messageId":"5fcd1a9b7eae09b6296c0167","payload":[0,0,0,53199,0,0,0,46520],"queueLengthByUnitId":{"unitId":3,"queueLength":0},"queueUnitId":3,"unitId":3,"modbusRequest":{"value":{"T3":28.8},"unitid":"3","fc":4,"address":"31397","quantity":"8","messageId":"5fcd1a9b7eae09b6296c0167"},"responseBuffer":{"data":[0,0,0,53199,0,0,0,46520],"buffer":[0,0,0,0,0,0,207,207,0,0,0,0,0,0,181,184]},"_msgid":"ad050b0c.bb6fb8","originalPayload":[0,0,0,53199,0,0,0,46520],"error":{"message":"TypeError: Cannot read property 'bind' of undefined","source":{"id":"b0563f39.60a0d","type":"buffer-parser","count":1},"stack":"TypeError: Cannot read property 'bind' of undefined\n at dataGetter (/home/pi/.node-red/node_modules/node-red-contrib-buffer-parser/buffer-parser.js:373:49)\n at itemReader (/home/pi/.node-red/node_modules/node-red-contrib-buffer-parser/buffer-parser.js:338:30)\n at parser (/home/pi/.node-red/node_modules/node-red-contrib-buffer-parser/buffer-parser.js:461:25)\n at bufferParserNode._inputCallback (/home/pi/.node-red/node_modules/node-red-contrib-buffer-parser/buffer-parser.js:786:31)\n at hooks.trigger (/usr/lib/node_modules/node-red/node_modules/@node-red/runtime/lib/nodes/Node.js:203:26)\n at Object.trigger (/usr/lib/node_modules/node-red/node_modules/@node-red/runtime/lib/hooks.js:113:9)\n at bufferParserNode.Node._emitInput (/usr/lib/node_modules/node-red/node_modules/@node-red/runtime/lib/nodes/Node.js:195:11)\n at bufferParserNode.Node.emit (/usr/lib/node_modules/node-red/node_modules/@node-red/runtime/lib/nodes/Node.js:179:25)\n at bufferParserNode.Node.receive..."}} Can the old OS (Strech) be to blame?

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Bufferparser with U64 Modbus

General

UnborN 6 December 2020 18:35 16

In this thread Nick mentions that reading 64bit ints from buffer was added in Node 12

Topic		Replies	Views
[UPDATED] node-red-contrib-buffer-parser - V3.1.2 Share Your Nodes	59	8425	27 June 2024
Using push into a for loop Industrial	16	1197	19 March 2021
ModBus TCP Read 64-bit registers Industrial	34	3738	24 April 2020
General support for newbie General	16	366	24 January 2025
Node-red-contrib-modbus, problem with modbus serie General	23	761	6 December 2023

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Bufferparser with U64 Modbus

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