Another Arduino/Modbus question
I am wondering how to proceed with bringing back more than one variable from the arduino.
I have followed the tutorial from JointTech (http://mango.serotoninsoftware.com/forum/posts/list/567.page) and it works great, however when I try to add more inputs things start to fall apart.
Does anybody have any pointers or better yet an example of a sketch outlining how to add in extra points?
Nevermind, I figured it out, I was adding the registers correctly, it was a setting in Mango holding me back.
Can you be more specific? Maybe someone else will have the same issue...
As per JointTechs sketch the first modbus variable was defined as:
regs[MB_REG0]=<variable goes here>
To add extra points simply increase the reg number, eg.
regs[MB_REG1]=<next variable here>.
When creating the data source in Mango, the offset needs to be increased by one to correspond with each point.
I will post up a copy of my sketch once it is cleaned up, my programming skills are horrible. :mrgreen:
Ok reading data from arduino is easy but what if you want to set an output on arduino?
Did you have some exemple ?
From what I have read the arduino modbuslave library does not have a COIL register implemented :(
Did you have some solution?