diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..eff42c9
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,51 @@
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+  workflow_dispatch:
+
+name: CI
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  check:
+    name: cargo check
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        toolchain: ["1.60.0", stable, nightly]
+    steps:
+      - uses: actions/checkout@v3
+      - uses: dtolnay/rust-toolchain@v1
+        with:
+          toolchain: ${{ matrix.toolchain }}
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo check
+
+  rustfmt:
+    name: rustfmt
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: dtolnay/rust-toolchain@v1
+        with:
+          toolchain: nightly
+          components: rustfmt
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo fmt --all -- --check
+
+  clippy:
+    name: clippy
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: dtolnay/rust-toolchain@v1
+        with:
+          toolchain: stable
+          components: clippy
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo clippy -- -A clippy::new-ret-no-self -D warnings
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..6985cf1
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,14 @@
+# Generated by Cargo
+# will have compiled files and executables
+debug/
+target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb
diff --git a/README.md b/README.md
index 04ed501..b6c6f1a 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,11 @@
 # AXP192 Rust
 
+[![CI](https://github.com/SergioGasquez/axp192-rs/actions/workflows/ci.yml/badge.svg)](https://github.com/SergioGasquez/axp192-rs/actions/workflows/ci.yml)
+![MSRV](https://img.shields.io/badge/MSRV-1.60-blue?style=flat-square)
+
 Rust implementation of AXP192 driver used in M5Stack devices.
 
 Initial version.
 
-
+## Resources
+- [AXP192 Datasheet](https://github.com/m5stack/M5-Schematic/blob/master/Core/AXP192%20Datasheet_v1.1_en_draft_2211.pdf)
diff --git a/src/lib.rs b/src/lib.rs
index 9dd4d5e..3cc5eeb 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,5 @@
 // Based on https://github.com/tuupola/axp192
-
+#![allow(dead_code)]
 const AXP192_ADDRESS: u8 = 0x34;
 /* Power control registers */
 const AXP192_POWER_STATUS: u8 = 0x00;
@@ -106,7 +106,7 @@ pub enum Command {
     Dcdc3Voltage(bool),
     Ldo23Voltage(bool),
     Gpio1Control(bool),
-    Gpio2Control(bool)
+    Gpio2Control(bool),
 }
 
 pub enum DataFormat<'a> {
@@ -123,13 +123,13 @@ impl Command {
         let (data, len) = match self {
             // Command structure: address, command, data, count & 0xf1
             //Command::Dcdc3Voltage(on) => ([AXP192_ADDRESS, AXP192_LDO2 , 0x0], 3),
-            Command::Dcdc13Ldo23Control(on) => ([AXP192_DCDC13_LDO23_CONTROL, 119], 2),
-            Command::Dcdc2Slope(on) => ([AXP192_DCDC2_SLOPE, 0x0], 2),
-            Command::Dcdc1Voltage(on) => ([AXP192_DCDC1_VOLTAGE, 106], 2),
-            Command::Dcdc3Voltage(on) => ([AXP192_DCDC3_VOLTAGE, 104], 2),
-            Command::Ldo23Voltage(on) => ([AXP192_LDO23_VOLTAGE, 242], 2),
-            Command::Gpio1Control(on) => ([AXP192_GPIO1_CONTROL, 0x0], 2),
-            Command::Gpio2Control(on) => ([AXP192_GPIO2_CONTROL, 104], 2),
+            Command::Dcdc13Ldo23Control(_on) => ([AXP192_DCDC13_LDO23_CONTROL, 119], 2),
+            Command::Dcdc2Slope(_on) => ([AXP192_DCDC2_SLOPE, 0x0], 2),
+            Command::Dcdc1Voltage(_on) => ([AXP192_DCDC1_VOLTAGE, 106], 2),
+            Command::Dcdc3Voltage(_on) => ([AXP192_DCDC3_VOLTAGE, 104], 2),
+            Command::Ldo23Voltage(_on) => ([AXP192_LDO23_VOLTAGE, 242], 2),
+            Command::Gpio1Control(_on) => ([AXP192_GPIO1_CONTROL, 0x0], 2),
+            Command::Gpio2Control(_on) => ([AXP192_GPIO2_CONTROL, 104], 2),
         };
         iface.send_commands(DataFormat::U8(&data[0..len]))
     }
@@ -164,16 +164,15 @@ where
 
         match cmd {
             DataFormat::U8(data) => {
+                self.i2c
+                    .write_read(self.addr, &[data[0]], &mut data_buf)
+                    .map_err(|_| Axp192Error::WriteError)?;
+                //println!("read value for command {:?}: {:?}", data[0], data_buf[0]);
 
-            let result = self.i2c
-                .write_read(self.addr, &[data[0]], &mut data_buf)
-                .map_err(|_| Axp192Error::WriteError);
-            //println!("read value for command {:?}: {:?}", data[0], data_buf[0]);
-
-            //println!("write value for command {:?}: {:?}", data[0], data[1]);
-            self.i2c
-                .write(self.addr, &data)
-                .map_err(|_| Axp192Error::WriteError)
+                //println!("write value for command {:?}: {:?}", data[0], data[1]);
+                self.i2c
+                    .write(self.addr, data)
+                    .map_err(|_| Axp192Error::WriteError)
             }
         }
     }
@@ -190,8 +189,8 @@ where
 }
 
 impl<I> Axp192<I>
-    where
-        I: Axp192ReadWrite,
+where
+    I: Axp192ReadWrite,
 {
     // Create a new AXP192 interface
     pub fn new(interface: I) -> Self {
@@ -211,7 +210,6 @@ impl<I> Axp192<I>
 
         Ok(())
     }
-
 }
 
 pub struct I2CInterface<I2C> {
@@ -222,7 +220,7 @@ pub struct I2CInterface<I2C> {
 
 impl<I2C> I2CInterface<I2C>
 where
-    I2C: embedded_hal::blocking::i2c::Write/*+ embedded_hal::blocking::i2c::WriteRead*/,
+    I2C: embedded_hal::blocking::i2c::Write, /*+ embedded_hal::blocking::i2c::WriteRead*/
 {
     /// Create new I2C interface for communication with a display driver
     pub fn new(i2c: I2C, addr: u8, data_byte: u8) -> Self {
@@ -243,7 +241,6 @@ where
 #[derive(Debug, Copy, Clone)]
 pub struct I2CPowerManagementInterface(());
 
-
 impl I2CPowerManagementInterface {
     pub fn new<I>(i2c: I) -> I2CInterface<I>
     where
@@ -260,6 +257,3 @@ impl I2CPowerManagementInterface {
         I2CInterface::new(i2c, address, 0x34)
     }
 }
-
-
-