diff --git a/Cargo.toml b/Cargo.toml
index 19fecc8..7320606 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,4 +1,5 @@
 workspace = { members = ["ecplorer"] }
+
 [package]
 name = "smokepatio"
 version = "0.1.0"
diff --git a/ecplorer/Cargo.lock b/ecplorer/Cargo.lock
new file mode 100644
index 0000000..982e7fe
--- /dev/null
+++ b/ecplorer/Cargo.lock
@@ -0,0 +1,269 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
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+dependencies = [
+ "anstyle",
+ "anstyle-parse",
+ "anstyle-query",
+ "anstyle-wincon",
+ "colorchoice",
+ "utf8parse",
+]
+
+[[package]]
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+ "clap_derive",
+]
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+ "anstream",
+ "anstyle",
+ "clap_lex",
+ "strsim",
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+ "syn",
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+ "clap",
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+]
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+ "embedded-io",
+ "log",
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+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
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diff --git a/ecplorer/Cargo.toml b/ecplorer/Cargo.toml
new file mode 100644
index 0000000..a97501a
--- /dev/null
+++ b/ecplorer/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "ecplorer"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+smokepatio = { version = "0.1", path = "../" }
+
+clap = { version = "4.4", features = [ "derive" ] }
+clap-num = "1.0"
diff --git a/ecplorer/src/args.rs b/ecplorer/src/args.rs
new file mode 100644
index 0000000..03e83a6
--- /dev/null
+++ b/ecplorer/src/args.rs
@@ -0,0 +1,53 @@
+use clap::{Parser, Subcommand};
+
+#[derive(Parser, Debug)]
+#[command(author, version, about, long_about = None)]
+pub struct Args {
+    /// Port address of ec data
+    #[arg(short, long, value_parser = clap_num::maybe_hex::<u16>)]
+    pub data_address: u16,
+
+    /// Port address of ec cmd
+    #[arg(short, long, value_parser = clap_num::maybe_hex::<u16>)]
+    pub cmd_address: u16,
+
+    /// Use 16-bit addresses instead of 8-bit
+    #[arg(short, long)]
+    pub extended: bool,
+
+    /// Operation to perform
+    #[command(subcommand)]
+    pub op: Operation,
+}
+
+impl Args {
+    pub fn load() -> Self {
+        Self::parse()
+    }
+}
+
+#[derive(Subcommand, Debug)]
+pub enum Operation {
+    /// Read whole address space, printing values
+    ReadAll,
+    /// Read a specific address
+    Read {
+        /// Address of embedded controller to read from
+        #[arg(value_parser = clap_num::maybe_hex::<u16>)]
+        address: u16,
+    },
+    /// Write a pattern to the whole address space
+    WritePattern {
+        // TODO
+    },
+    /// Write a value to a specific address
+    Write {
+        /// Address of embedded controller to write
+        #[arg(value_parser = clap_num::maybe_hex::<u16>)]
+        address: u16,
+
+        /// Value to write
+        #[arg(value_parser = clap_num::maybe_hex::<u8>)]
+        value: u8,
+    },
+}
diff --git a/ecplorer/src/main.rs b/ecplorer/src/main.rs
new file mode 100644
index 0000000..1d59b4f
--- /dev/null
+++ b/ecplorer/src/main.rs
@@ -0,0 +1,20 @@
+mod args;
+
+use smokepatio::ec::EmbeddedController;
+
+fn main() {
+    let cli = args::Args::load();
+    println!("args: {:?}", cli);
+
+    let mut ec = EmbeddedController::new(cli.data_address, cli.cmd_address);
+    match cli.op {
+        args::Operation::ReadAll => todo!(),
+        args::Operation::Read { address } => {
+            println!("{:#02x}", ec.get(address));
+        },
+        args::Operation::WritePattern {  } => todo!(),
+        args::Operation::Write { address, value } => {
+            ec.set(address, value);
+        },
+    }
+}