This is a ANSI-C portable, small-footprint, serial-line (RTU) client implementation of Modbus for the 8-bit PIC16 family of Microchip microcontrollers, with application limited to holding registries reads/writes.

PIC Microcontroller Master and Slave Modbus RTU Protocol - GitHub - worrajak/PICmodbus: PIC Microcontroller Master and Slave Modbus RTU Protocol

2010年2月6日 · I've implemented a Modbus RTU (and ASCII) slave for PIC18 but using USB instead of RS232/485. It would be very easy to convert to RS232/485 though as the protocol code only requires character transmit and receive functions. I can help you with this if required.

2019年7月18日 · liblightmodbus is a very lightweight, highly configurable, platform-independent Modbus RTU library. This is the closest I could find: freemodbus. There is a port to PIC32xx but I did not test it.

A small-footprint Modbus server crafted in assembler for Microchip PIC 18Fxxxx-series microcontrollers. - pheinrich/PIC-modbus

2013年8月20日 · Although the software was developed using the PIC32MX360F512L microcontroller, it is easily ported to other PIC microcontrollers that support TCP/IP functionality. This section provides an overview of the Modbus protocol. A detailed protocol specification is available from the Modbus Organization web site at: www.modbus.org.

Open Source PIC.org ported the stack to the PIC32. Supports RTU ands ASCII. The stack supports TCP and we will try to port this at a later time with the Microchip TCP Stack. Let us know if anyone would want TCP.

By request one of my long lost blogs was a MODbus RTU application for a PIC 18F27J53. You could easily plop this onto many of the 18F series micros. It doesn’t do much but it’s a great stepping stone for throwing in your own IO.

2012年12月27日 · Recently I've built a modbus RTU slave program for PIC. For my project I've managed only modbus function 03, 06, 16 and modbus exception. Also I've used Darrel Taylor interrupts for RX,TX, TMR0 and TMR2

It requires Modbus RTU communication through an RS-232C interface. I want to constantly read the temperature in the oven and process the data through my PIC microcontroller, which will then communicate back to the F4 controller to adjust the temperature accordingly.