Cant read or write with modbus nodes to two diffrent devices

General
1

I am using 2 jetson nano connected via wire using modebus serial trying to write and read data
I am using node red 11.1.1 and the module is node-red-contrib-modbus
I am new to node red only starting this week

this is my modbus Write flow

[{"id":"89369c2bcbeb76ca","type":"debug","z":"57325149c5ebdbcc","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":690,"y":1100,"wires":[]},{"id":"acefe3edeaaea469","type":"inject","z":"57325149c5ebdbcc","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"5","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"[0,0,0,1,1,1]","payloadType":"json","x":90,"y":1080,"wires":[["5d070261787e3b4f"]]},{"id":"5d070261787e3b4f","type":"function","z":"57325149c5ebdbcc","name":"","func":"\n\n\nmsg.payload ={ value: msg.payload,\n                'fc': 5,\n                'unitid': 1,\n                'address': 0 ,\n                'quantity': 6 }\n\nreturn msg","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":300,"y":1120,"wires":[["c77cda57d306495e"]]},{"id":"c77cda57d306495e","type":"modbus-flex-write","z":"57325149c5ebdbcc","name":"","showStatusActivities":true,"showErrors":true,"server":"64e234ec8ad4b896","emptyMsgOnFail":false,"keepMsgProperties":false,"x":490,"y":1120,"wires":[["89369c2bcbeb76ca"],["0792493db10c2906"]]},{"id":"0792493db10c2906","type":"modbus-response","z":"57325149c5ebdbcc","name":"","registerShowMax":20,"x":710,"y":1180,"wires":[]},{"id":"64e234ec8ad4b896","type":"modbus-client","name":"RS485-1","clienttype":"simpleser","bufferCommands":true,"stateLogEnabled":false,"queueLogEnabled":false,"tcpHost":"127.0.0.1","tcpPort":"502","tcpType":"DEFAULT","serialPort":"/dev/ttyUSB0","serialType":"RTU","serialBaudrate":"4800","serialDatabits":"8","serialStopbits":"1","serialParity":"none","serialConnectionDelay":"100","serialAsciiResponseStartDelimiter":"0x3A","unit_id":"1","commandDelay":"200","clientTimeout":"1000","reconnectOnTimeout":true,"reconnectTimeout":"2000","parallelUnitIdsAllowed":true}]

And my modbus Read flow

[{"id":"040f3f841721c8e4","type":"inject","z":"f9741d2194372498","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"5","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":210,"y":440,"wires":[["bc141855739a4d1a"]]},{"id":"bc141855739a4d1a","type":"function","z":"f9741d2194372498","name":"","func":"msg.payload = {  \n'fc': 3, 'unitid': 1, 'address': 0 , \n'quantity': 6 } ;\nreturn msg\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":300,"y":560,"wires":[["ca1fd0284d866462"]]},{"id":"ca1fd0284d866462","type":"modbus-flex-getter","z":"f9741d2194372498","name":"","showStatusActivities":true,"showErrors":true,"logIOActivities":false,"server":"64e234ec8ad4b896","useIOFile":false,"ioFile":"","useIOForPayload":false,"emptyMsgOnFail":false,"keepMsgProperties":false,"x":410,"y":440,"wires":[["e64761381089d6d6"],["8f251f22d86c7791"]]},{"id":"8f251f22d86c7791","type":"modbus-response","z":"f9741d2194372498","name":"","registerShowMax":20,"x":530,"y":560,"wires":[]},{"id":"e64761381089d6d6","type":"debug","z":"f9741d2194372498","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":510,"y":360,"wires":[]},{"id":"64e234ec8ad4b896","type":"modbus-client","name":"RS485-1","clienttype":"simpleser","bufferCommands":true,"stateLogEnabled":true,"queueLogEnabled":false,"tcpHost":"127.0.0.1","tcpPort":"502","tcpType":"DEFAULT","serialPort":"/dev/ttyUSB0","serialType":"RTU","serialBaudrate":"4800","serialDatabits":"8","serialStopbits":"1","serialParity":"none","serialConnectionDelay":"100","serialAsciiResponseStartDelimiter":"0x3A","unit_id":"1","commandDelay":"200","clientTimeout":"1000","reconnectOnTimeout":true,"reconnectTimeout":"2000","parallelUnitIdsAllowed":true}]

the errors I get for write is

msg : error
"Error: Client Not Ready To Write At State init"

msg : string[60]
"Modbus Failure On State sending Get More About It By Logging"

msg : TransactionTimedOutError
"TransactionTimedOutError: Timed out"

And for read the errors are

msg : string[60]
"Modbus Failure On State sending Get More About It By Logging"

msg : error
"Error: Timed out"

msg : error
"Error: Client Not Ready To Read At State init"

2

Have you found a solution to your problem ?
I have exactly the same.
Unfortunately I do not know how to debug this

3

Nope I haven't found a solution

4

Sorry I missed someting

5

? what do you mean by you miss something

6

Sorry if I have confused you.
I thought I had found a solution but that was a mistake and I deleted my post.
I have now chosen another solution for me and use two independent Modbus interfaces.
This is certainly completely contrary to the property of a Modbus system but after over 3 weeks of trial and error I have given up because this solution solves my case.
I wish you good luck with your project and please let me know if you succeed.

7

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