Modbus-Master-Slave-for-Arduino | Modbus Master-Slave library for Arduino
kandi X-RAY | Modbus-Master-Slave-for-Arduino Summary
kandi X-RAY | Modbus-Master-Slave-for-Arduino Summary
libmodbus is a library that provides a Serial Modbus implementation for Arduino. A primary goal was to enable industrial communication for the Arduino in order to link it to industrial devices such as HMIs, CNCs, PLCs, temperature regulators or speed drives.
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QUESTION
I'm trying to send json over modbus rtu (I know, it is very bad use of modbus.)
I have connected Arduino USB to PC as COM5 and RS485 converter connected to USB-RS485 to PC as COM4.
If I read data from Arduino using QModBus application, I will see a lot of bytes (COM4).
For control: after I send from QModBus "read holding registers" Arduino serial monitor on "Arduino usb port" (COM5) print valid string. So I mean that modbus bytes are ok:
There is my Arduino code:
...ANSWER
Answered 2018-Jan-22 at 02:06This should work:
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