diff --git a/libs/calliope-i2c/i2c.ts b/libs/calliope-i2c/i2c.ts
index d1d0d7b4..0aa06b0e 100644
--- a/libs/calliope-i2c/i2c.ts
+++ b/libs/calliope-i2c/i2c.ts
@@ -1,3 +1,4 @@
+import rgbw = basic.rgbw;
 serial.writeLine("I2C");
 // send to 0x44, register 0x00, value 0x46 (RESET ISL29125)
 pins.i2cWriteNumber(0x44, 0x0046, NumberFormat.UInt16BE);
@@ -6,13 +7,17 @@ pins.i2cWriteNumber(0x44, 0x0105, NumberFormat.UInt16BE);
 basic.forever(() => {
     serial.writeString("[");
     pins.i2cWriteNumber(0x44, 0x0A, NumberFormat.Int8BE);
-    serial.writeNumber(pins.i2cReadNumber(0x44, NumberFormat.UInt8BE));
+    let g = pins.i2cReadNumber(0x44, NumberFormat.UInt8BE);
+    serial.writeNumber(r);
     serial.writeString(",");
     pins.i2cWriteNumber(0x44, 0x0C, NumberFormat.UInt8BE);
-    serial.writeNumber(pins.i2cReadNumber(0x44, NumberFormat.UInt8BE));
+    let r = pins.i2cReadNumber(0x44, NumberFormat.UInt8BE);
+    serial.writeNumber(g);
     serial.writeString(",");
     pins.i2cWriteNumber(0x44, 0x0E, NumberFormat.UInt8BE);
-    serial.writeNumber(pins.i2cReadNumber(0x44, NumberFormat.UInt8LE));
+    let b = pins.i2cReadNumber(0x44, NumberFormat.UInt8LE);
+    serial.writeNumber(b);
     serial.writeLine("]");
+    basic.setLedColor(basic.rgbw(r,g,b, 0));
     basic.pause(1000);
 });
\ No newline at end of file
diff --git a/libs/core/_locales/core-strings.json b/libs/core/_locales/core-strings.json
index a43c6577..644af8ab 100644
--- a/libs/core/_locales/core-strings.json
+++ b/libs/core/_locales/core-strings.json
@@ -174,8 +174,8 @@
   "pins.analogWritePin|block": "analog write|pin %name|to %value",
   "pins.digitalReadPin|block": "digital read|pin %name",
   "pins.digitalWritePin|block": "digital write|pin %name|to %value",
-  "pins.i2cReadNumber|block": "i2c read number|at address %address|of format %format=i2c_sizeof",
-  "pins.i2cWriteNumber|block": "i2c write number|at address %address|with value %value|of format %format=i2c_sizeof",
+  "pins.i2cReadNumber|block": "i2c read number|at address %address|of format %format=i2c_sizeof|repeat %repeat",
+  "pins.i2cWriteNumber|block": "i2c write number|at address %address|with value %value|of format %format=i2c_sizeof|repeat %repeat",
   "pins.map|block": "map %value|from low %fromLow|from high %fromHigh|to low %toLow|to high %toHigh",
   "pins.onPulsed|block": "on|pin %pin|pulsed %pulse",
   "pins.pulseDuration|block": "pulse duration (µs)",
diff --git a/libs/core/pins.ts b/libs/core/pins.ts
index 5f70b304..aec32295 100644
--- a/libs/core/pins.ts
+++ b/libs/core/pins.ts
@@ -22,9 +22,9 @@ namespace pins {
      * Read one number from 7-bit I2C address.
      */
     //% help=pins/i2c-read-number blockGap=8
-    //% blockId=pins_i2c_readnumber block="i2c read number|at address %address|of format %format=i2c_sizeof" weight=7
-    export function i2cReadNumber(address: number, format: NumberFormat): number {
-        let buf = pins.i2cReadBuffer(address, pins.sizeOf(format))
+    //% blockId=pins_i2c_readnumber block="i2c read number|at address %address|of format %format=i2c_sizeof|repeat %repeat" weight=7
+    export function i2cReadNumber(address: number, format: NumberFormat, repeat?: boolean): number {
+        let buf = pins.i2cReadBuffer(address, pins.sizeOf(format), repeat)
         return buf.getNumber(format, 0)
     }
 
@@ -32,11 +32,11 @@ namespace pins {
      * Write one number to a 7-bit I2C address.
      */
     //% help=pins/i2c-write-number blockGap=8
-    //% blockId=i2c_writenumber block="i2c write number|at address %address|with value %value|of format %format=i2c_sizeof" weight=6
-    export function i2cWriteNumber(address: number, value: number, format: NumberFormat): void {
+    //% blockId=i2c_writenumber block="i2c write number|at address %address|with value %value|of format %format=i2c_sizeof|repeat %repeat" weight=6
+    export function i2cWriteNumber(address: number, value: number, format: NumberFormat, repeat?: boolean): void {
         let buf = createBuffer(pins.sizeOf(format))
         buf.setNumber(format, 0, value)
-        pins.i2cWriteBuffer(address, buf)
+        pins.i2cWriteBuffer(address, buf, repeat)
     }
 
     /**
diff --git a/tests/i2c.ts b/tests/i2c.ts
new file mode 100644
index 00000000..d56d2d6b
--- /dev/null
+++ b/tests/i2c.ts
@@ -0,0 +1,4 @@
+let item = pins.i2cReadNumber(123, NumberFormat.Int8LE)
+pins.i2cWriteNumber(123, 0, NumberFormat.Int8LE)
+let item = pins.i2cReadNumber(123, NumberFormat.Int8LE, true)
+pins.i2cWriteNumber(123, 0, NumberFormat.Int8LE, true)
\ No newline at end of file