modbusino RTU Library (modbus slave)

modbusino is lightweight RTU Modbus slave library that supports ‘read holding registers’ and ‘write multiple registers’ functions. Please note that prior to commit 02dff3c (branch Sming, port URL https://github.com/kmihaylov/modbusino) a delay may occur after sending a message (more information can be found in the PR thread #2043, https://github.com/SmingHub/Sming/pull/2043#issuecomment-615945823).

Configuration variables

RS485_RE_PIN

Default: 15

GPIO pin number for RE (Receive-Enable) output.

RS485_TX_LEVEL

Default: HIGH.

Active level for RE pin during transmission.

References

• Source Code

Used by

• Modbusino RTU generic sample Sample

Environment Variables

• RS485_RE_PIN

• RS485_TX_LEVEL

SoC support

• esp32

• esp32c2

• esp32c3

• esp32s2

• esp32s3

• esp8266

• host

• rp2040

Submodule: modbusino

• Modbusino
  • Introduction
  • Features
  • Example
  • Contribute