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Posted to commits@nuttx.apache.org by "raiden00pl (via GitHub)" <gi...@apache.org> on 2026/04/13 14:47:13 UTC

[I] [FEATURE] New Modbus implementation for NuttX [nuttx-apps]

raiden00pl opened a new issue, #3453:
URL: https://github.com/apache/nuttx-apps/issues/3453

   ### Is your feature request related to a problem? Please describe.
   
   After struggling with the FreeModBus implementation available in NuttX I decided to write my own implementation of Modbus stack.
   
   The FreeModBus in my opinion is very poor quality and NuttX deserve something better.
   
   Problems I want to solve:
   - https://github.com/apache/nuttx-apps/issues/3037
   - follow NuttX coding standard
   - clean API for callback registration
   - support for Modbus TCP 
   - Modbus TLS someday
   - support for many Modbus instances on the same firmware
   - support for hardware-accelerated Modbus handling available in some USART peripherals
   - support for not standard interfaces (Modbus over BLE or other weird things)
   
   
   ### Describe the solution you'd like
   
   -
   
   ### Describe alternatives you've considered
   
   -
   
   ### Verification
   
   - [x] I have verified before submitting the report.


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Re: [I] [FEATURE] New Modbus implementation for NuttX [nuttx-apps]

Posted by "raiden00pl (via GitHub)" <gi...@apache.org>.
raiden00pl commented on issue #3453:
URL: https://github.com/apache/nuttx-apps/issues/3453#issuecomment-4252298621

   @cederom Of course, the more people involved in testing, the better. I already have it somehow working, but so far I've been doing all my testing on the host (qemu and SIM). The library passes the tests I previously wrote for the freemodbus implementation. I haven't tested it on real hw yet


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Re: [I] [FEATURE] New Modbus implementation for NuttX [nuttx-apps]

Posted by "acassis (via GitHub)" <gi...@apache.org>.
acassis closed issue #3453: [FEATURE] New Modbus implementation for NuttX
URL: https://github.com/apache/nuttx-apps/issues/3453


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Re: [I] [FEATURE] New Modbus implementation for NuttX [nuttx-apps]

Posted by "cederom (via GitHub)" <gi...@apache.org>.
cederom commented on issue #3453:
URL: https://github.com/apache/nuttx-apps/issues/3453#issuecomment-4282354929

   Thank you @raiden00pl I am prototyping a new board right now, it should be ready this week maybe next week, then I will play with your stack on the real hw, thank you again for sharing your solution!! :-)


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Re: [I] [FEATURE] New Modbus implementation for NuttX [nuttx-apps]

Posted by "cederom (via GitHub)" <gi...@apache.org>.
cederom commented on issue #3453:
URL: https://github.com/apache/nuttx-apps/issues/3453#issuecomment-4239175670

   I will be using ModBus in a few days too, let me know if you need support / testing and if you found a better solution @raiden00pl :-)
   
   Particularly we may want to have two modbus instances running in a master-slave proxy with read/write intercept capabilities :-)
   
   I was playing with ESP-IDF esp-modbus that was using FreeModbus and it was kinda pita :D 


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