diff --git a/i2c-bus/i2c-bus-tests.ts b/i2c-bus/i2c-bus-tests.ts
new file mode 100644
index 0000000000..1e4c6c8bcb
--- /dev/null
+++ b/i2c-bus/i2c-bus-tests.ts
@@ -0,0 +1,153 @@
+// Tests for i2c-bus/index.d.ts
+// Project: https://github.com/fivdi/i2c-bus
+// Definitions by: Jason Heard <https://github.com/101100>
+
+// Tests taken from documentation samples.
+
+import { I2cBus, open, openSync } from "i2c-bus";
+import * as asnc from "async";
+
+
+function toCelsius(rawTemp: number): number {
+    const halfDegrees = ((rawTemp & 0xff) << 1) + (rawTemp >> 15);
+
+    if ((halfDegrees & 0x100) === 0) {
+        return halfDegrees / 2; // Temp +ve
+    }
+
+    return -((~halfDegrees & 0xff) / 2); // Temp -ve
+}
+
+
+/**
+ * Example 1 from the i2c-bus README file.
+ */
+function example1(): void {
+    const i2c1 = openSync(1);
+
+    const DS1621_ADDR = 0x48,
+        CMD_ACCESS_CONFIG = 0xac,
+        CMD_READ_TEMP = 0xaa,
+        CMD_START_CONVERT = 0xee;
+
+    // Enter one shot mode (this is a non volatile setting)
+    i2c1.writeByteSync(DS1621_ADDR, CMD_ACCESS_CONFIG, 0x01);
+
+    // Wait while non volatile memory busy
+    while (i2c1.readByteSync(DS1621_ADDR, CMD_ACCESS_CONFIG) & 0x10) {
+    }
+
+    // Start temperature conversion
+    i2c1.sendByteSync(DS1621_ADDR, CMD_START_CONVERT);
+
+    // Wait for temperature conversion to complete
+    while ((i2c1.readByteSync(DS1621_ADDR, CMD_ACCESS_CONFIG) & 0x80) === 0) {
+    }
+
+    // Display temperature
+    const rawTemp = i2c1.readWordSync(DS1621_ADDR, CMD_READ_TEMP);
+    console.log("temp: " + toCelsius(rawTemp));
+
+    i2c1.closeSync();
+}
+
+
+/**
+ * Example 2 from the i2c-bus README file.
+ */
+function example2(): void {
+    let i2c1: I2cBus;
+
+    const DS1621_ADDR = 0x48,
+        CMD_ACCESS_CONFIG = 0xac,
+        CMD_READ_TEMP = 0xaa,
+        CMD_START_CONVERT = 0xee;
+
+    async.series([
+        cb => {
+            i2c1 = open(1, cb);
+        },
+        cb => {
+            // Enter one shot mode (this is a non volatile setting)
+            i2c1.writeByte(DS1621_ADDR, CMD_ACCESS_CONFIG, 0x01, cb);
+        },
+        cb => {
+            // Wait while non volatile memory busy
+            (function read(): void {
+                i2c1.readByte(DS1621_ADDR, CMD_ACCESS_CONFIG, (err, config) => {
+                    if (err) return cb(err);
+                    if (config & 0x10) return read();
+                    cb(undefined);
+                });
+            }());
+        },
+        cb => {
+            // Start temperature conversion
+            i2c1.sendByte(DS1621_ADDR, CMD_START_CONVERT, cb);
+        },
+        cb => {
+            // Wait for temperature conversion to complete
+            (function read(): void {
+                i2c1.readByte(DS1621_ADDR, CMD_ACCESS_CONFIG, (err, config) => {
+                    if (err) return cb(err);
+                    if ((config & 0x80) === 0) return read();
+                    cb(undefined);
+                });
+            }());
+        },
+        cb => {
+            // Display temperature
+            i2c1.readWord(DS1621_ADDR, CMD_READ_TEMP, (err, rawTemp) => {
+                if (err) return cb(err);
+                console.log("temp: " + toCelsius(rawTemp));
+                cb(undefined);
+            });
+        },
+        cb => {
+            i2c1.close(cb);
+        }
+    ], err => {
+        if (err) throw err;
+    });
+}
+
+
+/**
+ * Example 3 from the i2c-bus README file.
+ */
+function example3(): void {
+    let i2c1: I2cBus;
+
+    const DS1621_ADDR = 0x48,
+        DS1621_CMD_ACCESS_TH = 0xa1;
+
+    const TSL2561_ADDR = 0x39,
+        TSL2561_CMD = 0x80,
+        TSL2561_REG_ID = 0x0a;
+
+    i2c1 = open(1, err => {
+        if (err) throw err;
+
+        function readTempHigh(): void {
+            i2c1.readWord(DS1621_ADDR, DS1621_CMD_ACCESS_TH, (err, tempHigh) => {
+                if (err) throw err;
+                console.log("temp: " + tempHigh);
+                // read another temperature
+                readTempHigh();
+            });
+        }
+
+        readTempHigh();
+
+        function readId(): void {
+            i2c1.readByte(TSL2561_ADDR, TSL2561_CMD | TSL2561_REG_ID, (err, id) => {
+                if (err) throw err;
+                console.log("id: " + id);
+                // read another ID
+                readId();
+            });
+        }
+
+        readId();
+    });
+}
diff --git a/i2c-bus/index.d.ts b/i2c-bus/index.d.ts
new file mode 100644
index 0000000000..e03432b75d
--- /dev/null
+++ b/i2c-bus/index.d.ts
@@ -0,0 +1,396 @@
+// Type definitions for i2c-bus v1.0.0
+// Project: https://github.com/fivdi/i2c-bus
+// Definitions by: Jason Heard <https://github.com/101100>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference types="node" />
+
+
+type CompletionCallback = (error: any) => any;
+
+type BufferCallback = (error: any, bytesReadOrWritten: number, buffer: Buffer) => any;
+
+type ResultCallback<T> = (error: any, result: T) => any;
+
+export interface I2cBusFuncs {
+    i2c: boolean;
+    tenBitAddr: boolean;
+    protocolMangling: boolean;
+    smbusPec: boolean;
+    smbusBlockProcCall: boolean;
+    smbusQuick: boolean;
+    smbusReceiveByte: boolean;
+    smbusSendByte: boolean;
+    smbusReadByte: boolean;
+    smbusWriteByte: boolean;
+    smbusReadWord: boolean;
+    smbusWriteWord: boolean;
+    smbusProcCall: boolean;
+    smbusReadBlock: boolean;
+    smbusWriteBlock: boolean;
+    smbusReadI2cBlock: boolean;
+    smbusWriteI2cBlock: boolean;
+}
+
+export interface I2cBus {
+
+    /**
+     * Asynchronous close.
+     *
+     * @param {CompletionCallback} callback
+     *     Completion callback
+     */
+    close(callback: CompletionCallback): void;
+
+    /**
+     * Synchronous close.
+     */
+    closeSync(): void;
+
+    /**
+     * Determine functionality of the bus/adapter asynchronously.
+     *
+     * @param {ResultCallback<I2cBusFuncs>} callback
+     *     Callback that will recieve a frozen I2cFuncs object describing the I2C functionality available.
+     */
+    i2cFuncs(callback: ResultCallback<I2cBusFuncs>): void;
+
+    /**
+     * Determine functionality of the bus/adapter synchronously.
+     *
+     * @return {I2cBusFuncs}
+     *     A frozen I2cFuncs object describing the I2C functionality available.
+     */
+    i2cFuncsSync(): I2cBusFuncs;
+
+    /**
+     * Scans the I2C bus asynchronously for devices the same way <code>i2cdetect -y -r</code> would.
+     *
+     * @param {ResultCallback<number[]>} callback
+     *     Callback that will recieve an array of numbers where each number represents the I2C address of a device which was detected.
+     */
+    scan(callback: ResultCallback<number[]>): void;
+
+    /**
+     * Scans the I2C bus synchronously for devices the same way <code>i2cdetect -y -r</code> would.
+     *
+     * @return {number[]}
+     *     An array of numbers where each number represents the I2C address of a device which was detected.
+     */
+    scanSync(): number[];
+
+    /**
+     * Asynchronous plain I2C read.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @param {number} length
+     *     The number of bytes to read.
+     * @param {Buffer} buffer
+     *     The buffer that the data will be written to (must be at least {length} bytes long).
+     * @param {BufferCallback} callback
+     *     Callback that will recieve the number of bytes read and the given buffer.
+     */
+    i2cRead(address: number, length: number, buffer: Buffer, callback: BufferCallback): void;
+
+    /**
+     * Synchronous plain I2C read.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @param {number} length
+     *     The number of bytes to read.
+     * @param {Buffer} buffer
+     *     The buffer that the data will be written to (must be at least {length} bytes long).
+     * @return {number}
+     *     The number of bytes read.
+     */
+    i2cReadSync(address: number, length: number, buffer: Buffer): number;
+
+    /**
+     * Asynchronous plain I2C write.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @param {number} length
+     *     The number of bytes to write.
+     * @param {Buffer} buffer
+     *     The buffer that the data to write (must contain at least {length} bytes).
+     * @param {BufferCallback} callback
+     *     Callback that will recieve the number of bytes written and the given buffer.
+     */
+    i2cWrite(address: number, length: number, buffer: Buffer, callback: BufferCallback): void;
+
+    /**
+     * Synchronous plain I2C write.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @param {number} length
+     *     The number of bytes to write.
+     * @param {Buffer} buffer
+     *     The buffer that the data will to write (must contain at least {length} bytes).
+     * @return {number}
+     *     The number of bytes written.
+     */
+    i2cWriteSync(address: number, length: number, buffer: Buffer): number;
+
+    /**
+     * Asynchronous SMBus read byte.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @param {number} command
+     *     The command code.
+     * @param {ResultCallback<number>} callback
+     *     Callback that will recieve the byte read.
+     */
+    readByte(address: number, command: number, callback: ResultCallback<number>): void;
+
+    /**
+     * Synchronous SMBus read byte.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @param {number} command
+     *     The command code.
+     * @return {number}
+     *     The byte read.
+     */
+    readByteSync(address: number, command: number): number;
+
+    /**
+     * Asynchronous SMBus read word.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @param {number} command
+     *     The command code.
+     * @param {ResultCallback<number>} callback
+     *     Callback that will recieve the word read.
+     */
+    readWord(address: number, command: number, callback: ResultCallback<number>): void;
+
+    /**
+     * Synchronous SMBus read word.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @param {number} command
+     *     The command code.
+     * @return {number}
+     *     The word read.
+     */
+    readWordSync(address: number, command: number): number;
+
+    /**
+     * Asynchronous I2C block read (not defined by the SMBus
+     * specification). Reads a block of bytes from a device, from a
+     * designated register that is specified by cmd.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @param {number} command
+     *     The command code.
+     * @param {number} length
+     *     The number of bytes to read (max 32).
+     * @param {Buffer} buffer
+     *     The buffer that the data will be written to (must be at least {length} bytes long).
+     * @param {BufferCallback} callback
+     *     Callback that will recieve the number of bytes read and the given buffer.
+     */
+    readI2cBlock(address: number, command: number, length: number, buffer: Buffer, callback: BufferCallback): void;
+
+    /**
+     * Synchronous I2C block read (not defined by the SMBus
+     * specification). Reads a block of bytes from a device, from a
+     * designated register that is specified by cmd.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @param {number} command
+     *     The command code.
+     * @param {number} length
+     *     The number of bytes to read (max 32).
+     * @param {Buffer} buffer
+     *     The buffer that the data will be written to (must be at least {length} bytes long).
+     * @return {number}
+     *     The number of bytes read.
+     */
+    readI2cBlockSync(address: number, command: number, length: number, buffer: Buffer): number;
+
+    /**
+     * Asynchronous SMBus receive byte.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @param {ResultCallback<number>} callback
+     *     Callback that will recieve the byte received.
+     */
+    receiveByte(address: number, callback: ResultCallback<number>): void;
+
+    /**
+     * Synchronous SMBus receive byte.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @return {number}
+     *     The byte received.
+     */
+    receiveByteSync(address: number): number;
+
+    /**
+     * Asynchronous SMBus send byte.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @param {number} byte
+     *     The data byte to send.
+     * @param {CompletionCallback} callback
+     *     Completion callback
+     */
+    sendByte(address: number, byte: number, callback: CompletionCallback): void;
+
+    /**
+     * Synchronous SMBus send byte.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @param {number} byte
+     *     The data byte to send.
+     */
+    sendByteSync(address: number, byte: number): void;
+
+    /**
+     * Asynchronous SMBus write byte.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @param {number} command
+     *     The command code.
+     * @param {number} byte
+     *     The data byte to write.
+     * @param {CompletionCallback} callback
+     *     Completion callback
+     */
+    writeByte(address: number, command: number, byte: number, callback: CompletionCallback): void;
+
+    /**
+     * Synchronous SMBus write byte.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @param {number} command
+     *     The command code.
+     * @param {number} byte
+     *     The data byte to write.
+     */
+    writeByteSync(address: number, command: number, byte: number): void;
+
+    /**
+     * Asynchronous SMBus write word.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @param {number} command
+     *     The command code.
+     * @param {number} word
+     *     The data word to write.
+     * @param {CompletionCallback} callback
+     *     Completion callback
+     */
+    writeWord(address: number, command: number, word: number, callback: CompletionCallback): void;
+
+    /**
+     * Synchronous SMBus write word.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @param {number} command
+     *     The command code.
+     * @param {number} word
+     *     The data word to write.
+     */
+    writeWordSync(address: number, command: number, word: number): void;
+
+    /**
+     * Asynchronous SMBus quick command.  Writes a single bit to the device.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @param {number} bit
+     *     The data bit to write (0 or 1).
+     * @param {CompletionCallback} callback
+     *     Completion callback
+     */
+    writeQuick(address: number, command: number, bit: number, callback: CompletionCallback): void;
+
+    /**
+     * Synchronous SMBus quick command.  Writes a single bit to the device.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @param {number} bit
+     *     The data bit to write (0 or 1).
+     */
+    writeQuickSync(address: number, command: number, bit: number): void;
+
+    /**
+     * Asynchronous I2C block write (not defined by the SMBus
+     * specification). Writes a block of bytes to a device, to a designated
+     * register that is specified by {command}.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @param {number} command
+     *     The command code.
+     * @param {number} length
+     *     The number of bytes to write (max 32).
+     * @param {Buffer} buffer
+     *     The buffer that the data to write (must contain at least {length} bytes).
+     * @param {BufferCallback} callback
+     *     Callback that will recieve the number of bytes written and the given buffer.
+     */
+    writeI2cBlock(address: number, command: number, length: number, buffer: Buffer, callback: BufferCallback): void;
+
+    /**
+     * Synchronous I2C block write (not defined by the SMBus
+     * specification). Writes a block of bytes to a device, to a designated
+     * register that is specified by {command}.
+     *
+     * @param {number} address
+     *     I2C device address.
+     * @param {number} command
+     *     The command code.
+     * @param {number} length
+     *     The number of bytes to write (max 32).
+     * @param {Buffer} buffer
+     *     The buffer that the data will to write (must contain at least {length} bytes).
+     * @return {number}
+     *     The number of bytes written.
+     */
+    writeI2cBlockSync(address: number, command: number, length: number, buffer: Buffer): number;
+
+}
+
+/**
+ * Asynchronous open.
+ *
+ * @param  {number} busNumber
+ *     The number of the I2C bus/adapter to open, 0 for {/dev/i2c-0}, 1 for {/dev/i2c-1}, etc.
+ * @param  {CompletionCallback} callback
+ *     Completion callback.
+ * @return {I2cBus}
+ *     A new I2cBus object.
+ */
+export function open(busNumber: number, calback: CompletionCallback): I2cBus;
+
+/**
+ * Synchronous open.
+ *
+ * @param  {number} busNumber
+ *     The number of the I2C bus/adapter to open, 0 for {/dev/i2c-0}, 1 for {/dev/i2c-1}, etc.
+ * @return {I2cBus}
+ *     A new I2cBus object.
+ */
+export function openSync(busNumber: number): I2cBus;
diff --git a/i2c-bus/tsconfig.json b/i2c-bus/tsconfig.json
new file mode 100644
index 0000000000..174a0be030
--- /dev/null
+++ b/i2c-bus/tsconfig.json
@@ -0,0 +1,20 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "target": "es6",
+        "noImplicitAny": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "../async/index.d.ts",
+        "index.d.ts",
+        "i2c-bus-tests.ts"
+    ]
+}