This is a Swift port of Lars-Jørgen Kristiansen's ObjectiveLibModbus. For those who are not familiar with his work, it is a wrapper class for the libmodbus library.
Currently, this project is a direct port of ObjectiveLibModbus. I tried to stay true to his code as much as I can, but moving forward, my plan is to include more of the features available in libmodbus and adding 32-bit data support. I'm also planning on adding features such as reading data from non-consecutive addresses (i.e. address 1, 10, and 20). I will try to port back those features to ObjectiveLibModbus as well.
Please feel free to add, modify, suggest, comment, or whatever.
- Drag all the .c and .h files from the Vendor/libmodbus folder into your project.
- Drag SwiftLibModbus.swift and SwiftLibModbus-Bridging-Header.h into your project from SwiftLibModbus folder.
- Make sure to add SwiftLibModbus-Bridging-Header.h to the project's Build Setting. If you already have a Bridging Header, copy and paste the content of SwiftLibModbus-Bridging-Header.h to your Bridging Header.
Now that you're set up, do the following to make modbus calls
- Now make a new instance of SwiftLibModbus and connect:
let swiftLibModbus = SwiftLibModbus(ipAddress: "192.168.2.10", port: 502, device: 1)
swiftLibModbus.connect(
{ () -> Void in
//connected and ready to do modbus calls
},
failure: { (error: NSError) -> Void in
//Handle error
print("error")
})- Make a modbus call:
swiftLibModbus.readBitsFrom(1000, count: 5,
success: { (array: [AnyObject]) -> Void in
//Do something with the returned data (NSArray of NSNumber)..
print("success: \(array)")
},
failure: { (error: NSError) -> Void in
//Handle error
print("error")
})- Disconnect when you are finished with you’re modbus calls:
swiftLibModbus.disconnect()