diff --git a/src/ads1015.ts b/src/ads1015.ts
index 69c113b..e439bc7 100644
--- a/src/ads1015.ts
+++ b/src/ads1015.ts
@@ -1,9 +1,9 @@
 import Device from "@chirimen/ads1015";
 import { ReadableDevice } from "./Device";
-import { I2CPort, i2c } from "./i2c";
+import { I2C, i2c } from "./i2c";
 
 export function ads1015(
-  bus: I2CPort = i2c(),
+  bus: I2C = i2c(),
   address: number = 0x48,
   channel: 0 | 1 | 2 | 3 = 0
 ): ReadableDevice<number> {
diff --git a/src/adt7410.ts b/src/adt7410.ts
index f1294f4..49b3700 100644
--- a/src/adt7410.ts
+++ b/src/adt7410.ts
@@ -1,12 +1,12 @@
 import Device from "@chirimen/adt7410";
 import { ReadableDevice } from "./Device";
-import { I2CPort, i2c } from "./i2c";
+import { I2C, i2c } from "./i2c";
 
 /** @type Temperature (°C) */
 type Temperature = number;
 
 export function adt7410(
-  bus: I2CPort = i2c(),
+  bus: I2C = i2c(),
   address: number = 0x48
 ): ReadableDevice<number> {
   const device = new Device(bus, address);
diff --git a/src/adxl345.ts b/src/adxl345.ts
index 2dcf17a..b3fae02 100644
--- a/src/adxl345.ts
+++ b/src/adxl345.ts
@@ -1,12 +1,12 @@
 import Device from "@chirimen/grove-accelerometer";
 import { ReadableDevice } from "./Device";
-import { I2CPort, i2c } from "./i2c";
+import { I2C, i2c } from "./i2c";
 
 /** @type Acceleration (g) */
 type Acceleration = [number, number, number];
 
 export function adxl345(
-  bus: I2CPort = i2c(),
+  bus: I2C = i2c(),
   address: number = 0x53
 ): ReadableDevice<Acceleration> {
   const device = new Device(bus, address);
diff --git a/src/gp2y0e03.ts b/src/gp2y0e03.ts
index 0f09b51..3a034cd 100644
--- a/src/gp2y0e03.ts
+++ b/src/gp2y0e03.ts
@@ -1,12 +1,12 @@
 import Device from "@chirimen/gp2y0e03";
 import { ReadableDevice } from "./Device";
-import { I2CPort, i2c } from "./i2c";
+import { I2C, i2c } from "./i2c";
 
 /** @type Distance (cm) */
 type Distance = number;
 
 export function gp2y0e03(
-  bus: I2CPort = i2c(),
+  bus: I2C = i2c(),
   address: number = 0x40
 ): ReadableDevice<number> {
   const device = new Device(bus, address);
diff --git a/src/i2c.ts b/src/i2c.ts
index 7e42ef4..eddfe85 100644
--- a/src/i2c.ts
+++ b/src/i2c.ts
@@ -1,9 +1,11 @@
 import { I2CPort, I2CSlaveDevice, requestI2CAccess } from "node-web-i2c";
 
-export { I2CPort, I2CSlaveDevice, requestI2CAccess };
+export { I2CSlaveDevice, requestI2CAccess };
+
+export class I2C extends I2CPort {}
 
 export function i2c(bus: number = 1) {
-  return new I2CPort(bus);
+  return new I2C(bus);
 }
 
 export default i2c;
diff --git a/src/index.ts b/src/index.ts
index 02ede61..62ecf8b 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -7,7 +7,7 @@ export {
   default as gpio
 } from "./gpio";
 
-export { I2CSlaveDevice, requestI2CAccess, default as i2c } from "./i2c";
+export { I2C, I2CSlaveDevice, requestI2CAccess, default as i2c } from "./i2c";
 
 export { default as ads1015 } from "./ads1015";
 export { default as adt7410 } from "./adt7410";
diff --git a/src/mpr121.ts b/src/mpr121.ts
index dce11cd..1f878ba 100644
--- a/src/mpr121.ts
+++ b/src/mpr121.ts
@@ -1,6 +1,6 @@
 import Device from "@chirimen/grove-touch";
 import { ReadableDevice } from "./Device";
-import { I2CPort, i2c } from "./i2c";
+import { I2C, i2c } from "./i2c";
 
 /** @type true if touched by the finger, false otherwise */
 type Touched = [
@@ -19,7 +19,7 @@ type Touched = [
 ];
 
 export function mpr121(
-  bus: I2CPort = i2c(),
+  bus: I2C = i2c(),
   address: number = 0x5a
 ): ReadableDevice<Touched> {
   const device = new Device(bus, address);
diff --git a/src/paj7620.ts b/src/paj7620.ts
index e821817..ff0db76 100644
--- a/src/paj7620.ts
+++ b/src/paj7620.ts
@@ -1,6 +1,6 @@
 import Device from "@chirimen/grove-gesture";
 import { ReadableDevice } from "./Device";
-import { I2CPort, i2c } from "./i2c";
+import { I2C, i2c } from "./i2c";
 
 type Direction =
   | ""
@@ -14,7 +14,7 @@ type Direction =
   | "counterclockwise";
 
 export function paj7620(
-  bus: I2CPort = i2c(),
+  bus: I2C = i2c(),
   address: number = 0x73
 ): ReadableDevice<Direction> {
   const device = new Device(bus, address);
diff --git a/src/pca9685.ts b/src/pca9685.ts
index 7ec53df..268efea 100644
--- a/src/pca9685.ts
+++ b/src/pca9685.ts
@@ -1,6 +1,6 @@
 import Device from "@chirimen/pca9685";
 import { WritableDevice } from "./Device";
-import { I2CPort, i2c } from "./i2c";
+import { I2C, i2c } from "./i2c";
 
 type Channel =
   | 0
@@ -26,7 +26,7 @@ type Channel =
  * @param angleRange deg
  */
 export function pca9685(
-  bus: I2CPort = i2c(),
+  bus: I2C = i2c(),
   address: number = 0x40,
   channel: Channel = 0,
   minPulse?: number,
diff --git a/src/s11059.ts b/src/s11059.ts
index fdf67ba..32decc0 100644
--- a/src/s11059.ts
+++ b/src/s11059.ts
@@ -1,12 +1,12 @@
 import Device from "@chirimen/s11059";
 import { ReadableDevice } from "./Device";
-import { I2CPort, i2c } from "./i2c";
+import { I2C, i2c } from "./i2c";
 
 /** @type 8-bit RGB */
 type RGB = [number, number, number];
 
 export function s11059(
-  bus: I2CPort = i2c(),
+  bus: I2C = i2c(),
   address: number = 0x2a
 ): ReadableDevice<RGB> {
   const device = new Device(bus, address);
diff --git a/src/ssd1308.ts b/src/ssd1308.ts
index ce8c845..a24fe15 100644
--- a/src/ssd1308.ts
+++ b/src/ssd1308.ts
@@ -1,9 +1,9 @@
 import Device from "@chirimen/grove-oled-display";
 import { WritableDevice } from "./Device";
-import { I2CPort, i2c } from "./i2c";
+import { I2C, i2c } from "./i2c";
 
 export function ssd1308(
-  bus: I2CPort = i2c(),
+  bus: I2C = i2c(),
   address: number = 0x3c
 ): WritableDevice<boolean | number | string> {
   const device = new Device(bus, address);
diff --git a/src/tsl2561.ts b/src/tsl2561.ts
index 51a525e..88ccff3 100644
--- a/src/tsl2561.ts
+++ b/src/tsl2561.ts
@@ -1,12 +1,12 @@
 import Device from "@chirimen/grove-light";
 import { ReadableDevice } from "./Device";
-import { I2CPort, i2c } from "./i2c";
+import { I2C, i2c } from "./i2c";
 
 /** @type Illuminance (lx) */
 type Illuminance = number;
 
 export function tsl2561(
-  bus: I2CPort = i2c(),
+  bus: I2C = i2c(),
   address: number = 0x29
 ): ReadableDevice<Illuminance> {
   const device = new Device(bus, address);
diff --git a/src/veml6070.ts b/src/veml6070.ts
index c7aee73..4f0675c 100644
--- a/src/veml6070.ts
+++ b/src/veml6070.ts
@@ -1,12 +1,12 @@
 import Device from "@chirimen/veml6070";
 import { ReadableDevice } from "./Device";
-import { I2CPort, i2c } from "./i2c";
+import { I2C, i2c } from "./i2c";
 
 /** @type UVA (μW/cm^2) */
 type UVA = number;
 
 /** slave addresses are 0x38 and 0x39 */
-export function veml6070(bus: I2CPort = i2c()): ReadableDevice<number> {
+export function veml6070(bus: I2C = i2c()): ReadableDevice<number> {
   const device = new Device(bus);
 
   return {
diff --git a/src/vl53l0x.ts b/src/vl53l0x.ts
index 09e12cd..3a4ceb9 100644
--- a/src/vl53l0x.ts
+++ b/src/vl53l0x.ts
@@ -1,6 +1,6 @@
 import Device from "@chirimen/vl53l0x";
 import { ReadableDevice } from "./Device";
-import { I2CPort, i2c } from "./i2c";
+import { I2C, i2c } from "./i2c";
 
 /** @type Enable long range mode (max 2200mm) */
 type EnableLongRangeMode = Boolean;
@@ -10,7 +10,7 @@ type Distance = number;
 
 /** max 1200 mm / 2200 mm (long range mode) */
 export function vl53l0x(
-  bus: I2CPort = i2c(),
+  bus: I2C = i2c(),
   address: number = 0x29,
   enableLongRangeMode?: EnableLongRangeMode
 ): ReadableDevice<Distance> {