This is a Swift wrapper class for the libmodbus library. Now support only TCP modbus connection. Support both macOS and Linux.
- Install libmodbus library
brew install libmodbusor
apt install libmodbus-dev- Add
.package(url: "https://github.com/DimaRU/SwiftyModbus.git", .upToNextMajor(from: "2.1.0"))to your dependencies.
- PromiseKit:
dependencies: [.product(name: "SwiftyModbusPromise", package: "SwiftyModbus")] - Result:
dependencies: [.product(name: "SwiftyModbus", package: "SwiftyModbus")] - Throwable:
dependencies: [.product(name: "SwiftyModbus", package: "SwiftyModbus")]
Autogenerated documentation https://dimaru.github.io/SwiftyModbus/
import Foundation
import SwiftyModbusPromise
import PromiseKit
let modbus = SwiftyModbusPromise(address: "127.0.0.1", port: 503)
modbus.responseTimeout = 1.5 // Set timeout for 1.5 sec
print(modbus.responseTimeout)
firstly {
modbus.connect()
}.then {
modbus.readRegisters(addr: 102, count: 10)
}.done { registers in
print(registers)
}.then {
modbus.writeRegisters(addr: 102, data: [1,2,3,4,5,6,7,8,9,10])
}.then {
modbus.readInputRegisters(addr: 102, count: 10)
}.done { registers in
print(registers)
}.then {
modbus.writeBits(addr: 104, status: [0,1,0,1])
}.then {
modbus.readBits(addr: 104, count: 4)
}.done { bits in
print(bits)
}.then {
modbus.disconnect()
}.catch { error in
print(error)
}.finally {
exit(0)
}
RunLoop.main.run()import Foundation
import SwiftyModbus
let modbusQueue = DispatchQueue(label: "queue.modbus")
modbusQueue.async {
modbusIO()
}
RunLoop.main.run()
func modbusIO() {
let modbus = SwiftyModbus(address: "127.0.0.1", port: 503)
modbus.responseTimeout = 1.5 // Set response timeout for 1.5 sec
print("Modbus responce timeout:", modbus.responseTimeout)
do {
try modbus.connect()
let registers = try modbus.readRegisters(addr: 102, count: 10)
print(registers)
try modbus.writeRegisters(addr: 102, data: [1,2,3,4,5,6,7,8,9,10])
let inputRegisters = try modbus.readInputRegisters(addr: 102, count: 10)
print(inputRegisters)
try modbus.writeBits(addr: 104, status: [0,1,0,1])
let bits = try modbus.readBits(addr: 104, count: 4)
print(bits)
modbus.disconnect()
exit(0)
} catch {
print(error)
exit(1)
}
}You may test this example with diagslave
sudo ./diagslave -m tcp -p 503