ESP-IDF libmodbus compatibility

[playmean]

Hello, I tried to add libmodbus as component to ESP-IDF environment, but compilation throws me this errors:

Code: Select all

$ make all
CC build/modbus/modbus-tcp.o
C:/msys32/opt/esp/esp-idf/components/modbus/modbus-tcp.c:31:24: fatal error: sys/ioctl.h: No such file or directory
compilation terminated.
make[1]: *** [/opt/esp/esp-idf/make/component_wrapper.mk:243: modbus-tcp.o] Error 1
make: *** [C:/msys32/opt/esp/esp-idf/make/project.mk:421: component-modbus-build] Error 2

How it can be fixed or maybe another esp32-friendly lib is present?

[shamsul]

Hello Playmean,
Did you have a success with libmodbus? I'm looking for a Modbus library that people have successfully used with esp32.
Please share your experience.
Thanks in advance.

[spanky]

I'm also interested in this.

I've used libmodbus a bunch in a linux environment, but it needs some non-trivial tweaks to get it to work on the esp32. Unfortunately some of the basic libraries are not yet implemented, so its either a case of heavily modifying libmodbus to workaround these missing components, or implementing the underlying libraries for the architecture.

[casmeiron]

Hello,

Did anyone get this working? We're also in need of such library for ESP32 ESP-IDF platform.

Thanks!

[franzhoepfinger]

Hi,

working on it.
seems reasonable effort to port libmodbus to ESP-IDF.

i will publish once running.

[franzhoepfinger]

running.

https://github.com/stephane/libmodbus/issues/767

Example for modbus-tcp: https://github.com/Fliegl-Agrartechnik- ... modbus-tcp

Example for modbus-rtu: https://github.com/Fliegl-Agrartechnik- ... modbus-rtu