modbus moved to feature

Cargo.toml

@@ -26,7 +26,7 @@ object-id = "0.1.3"
 oneshot = { version = "0.1.6", default-features = false, features = ["std"] }
 parking_lot = "0.12.1"
 pin-project = "1.1.5"
-rmodbus = { version = "0.9.3" }
+rmodbus = { version = "0.9.3", optional = true }
 roboplc-derive = { version = "0.1.5" }
 serde = { version = "1.0.197", features = ["derive", "rc"] }
 serial = "0.4.0"
@@ -41,8 +41,9 @@ tokio = { version = "1.36.0", optional = true }
 
 [features]
 eapi = ["eva-common", "eva-sdk", "busrt", "tokio"]
+modbus = ["rmodbus"]
 openssl-vendored = ["busrt/openssl-vendored", "eva-common/openssl-vendored"]
-full = ["eapi"]
+full = ["eapi", "modbus"]
 
 [dev-dependencies]
 env_logger = "0.11.3"
@@ -54,6 +55,7 @@ tracing = { version = "0.1.40", features = ["log"] }
 [[example]]
 name = "plc-modbus"
 path = "examples/plc-modbus.rs"
+required-features = ["modbus"]
 
 [[example]]
 name = "raw-udp"

src/io/mod.rs

@@ -5,6 +5,7 @@ use crate::Result;
 
 #[cfg(feature = "eapi")]
 pub mod eapi;
+#[cfg(feature = "modbus")]
 pub mod modbus;
 mod raw_udp;
 

src/lib.rs

@@ -105,6 +105,7 @@ macro_rules! impl_error {
 }
 
 impl_error!(std::io::Error, IO);
+#[cfg(feature = "modbus")]
 impl_error!(rmodbus::ErrorKind, IO);
 impl_error!(oneshot::RecvError, IO);
 impl_error!(num::ParseIntError, InvalidData);