diff --git a/packages/sampleprj/src/maingrovelcd16x2.ts b/packages/sampleprj/src/maingrovelcd16x2.ts
new file mode 100644
index 0000000000..4b3b416127
--- /dev/null
+++ b/packages/sampleprj/src/maingrovelcd16x2.ts
@@ -0,0 +1,172 @@
+import "@dsboard/seeed_xiao_esp32c3"
+import * as ds from "@devicescript/core"
+import { I2CDriver, XiaoExpansionBoard } from "@devicescript/drivers"
+import { delay } from "@devicescript/core"
+import { configureHardware } from "@devicescript/servers"
+
+// Device I2C Arress
+const LCD_ADDRESS = 0x7c >> 1
+const RGB_ADDRESS = 0xc4 >> 1
+const RGB_ADDRESS_V5 = 0x30
+
+// color define
+const WHITE = 0
+const RED = 1
+const GREEN = 2
+const BLUE = 3
+
+const REG_MODE1 = 0x00
+const REG_MODE2 = 0x01
+const REG_OUTPUT = 0x08
+
+// commands
+const LCD_CLEARDISPLAY = 0x01
+const LCD_RETURNHOME = 0x02
+const LCD_ENTRYMODESET = 0x04
+const LCD_DISPLAYCONTROL = 0x08
+const LCD_CURSORSHIFT = 0x10
+const LCD_FUNCTIONSET = 0x20
+const LCD_SETCGRAMADDR = 0x40
+const LCD_SETDDRAMADDR = 0x80
+
+// flags for display entry mode
+const LCD_ENTRYRIGHT = 0x00
+const LCD_ENTRYLEFT = 0x02
+const LCD_ENTRYSHIFTINCREMENT = 0x01
+const LCD_ENTRYSHIFTDECREMENT = 0x00
+
+// flags for display on/off control
+const LCD_DISPLAYON = 0x04
+const LCD_DISPLAYOFF = 0x00
+const LCD_CURSORON = 0x02
+const LCD_CURSOROFF = 0x00
+const LCD_BLINKON = 0x01
+const LCD_BLINKOFF = 0x00
+
+// flags for display/cursor shift
+const LCD_DISPLAYMOVE = 0x08
+const LCD_CURSORMOVE = 0x00
+const LCD_MOVERIGHT = 0x04
+const LCD_MOVELEFT = 0x00
+
+// flags for function set
+const LCD_8BITMODE = 0x10
+const LCD_4BITMODE = 0x00
+const LCD_2LINE = 0x08
+const LCD_1LINE = 0x00
+const LCD_5x10DOTS = 0x04
+const LCD_5x8DOTS = 0x00
+
+// https://wiki.seeedstudio.com/Grove-16x2_LCD_Series/#specification
+// converted from https://github.com/Seeed-Studio/Grove_LCD_RGB_Backlight/
+class RGBLCD extends I2CDriver {
+    readonly columns: number
+    readonly lines: number
+    readonly dotsize: number
+    private _displayfunction: number = 0
+    private _displaymode: number = 0
+    private _displaycontrol: number = 0
+    private _currline: number = 0
+
+    constructor(
+        readonly options: {
+            columns: number
+            rows: number
+            dotsize: number
+            devAddr?: number
+        }
+    ) {
+        super(options.devAddr || LCD_ADDRESS)
+        this.columns = options.columns
+        this.lines = options.rows
+        this.dotsize = options.dotsize
+    }
+
+    async initDriver(): Promise<void> {
+        if (this.lines > 1) {
+            this._displayfunction |= LCD_2LINE
+        }
+        this._currline = 0
+
+        // for some 1 line displays you can select a 10 pixel high font
+        if (this.dotsize !== 0 && this.lines === 1) {
+            this._displayfunction |= LCD_5x10DOTS
+        }
+
+        // SEE PAGE 45/46 FOR INITIALIZATION SPECIFICATION!
+        // according to datasheet, we need at least 40ms after power rises above 2.7V
+        // before sending commands. Arduino can turn on way befer 4.5V so we'll wait 50
+        // delayMicroseconds(50000);
+        await delay(5)
+
+        // this is according to the hitachi HD44780 datasheet
+        // page 45 figure 23
+
+        // Send function set command sequence
+        await this.command(LCD_FUNCTIONSET | this._displayfunction)
+        await delay(5) // wait more than 4.1ms
+
+        // second try
+        await this.command(LCD_FUNCTIONSET | this._displayfunction)
+        await delay(1)
+
+        // third go
+        await this.command(LCD_FUNCTIONSET | this._displayfunction)
+
+        // finally, set # lines, font size, etc.
+        await this.command(LCD_FUNCTIONSET | this._displayfunction)
+
+        // turn the display on with no cursor or blinking default
+        this._displaycontrol = LCD_DISPLAYON | LCD_CURSOROFF | LCD_BLINKOFF
+        await this.display()
+
+        // clear it off
+        await this.clear()
+
+        // Initialize to default text direction (for romance languages)
+        this._displaymode = LCD_ENTRYLEFT | LCD_ENTRYSHIFTDECREMENT
+        // set the entry mode
+        await this.command(LCD_ENTRYMODESET | this._displaymode)
+    }
+
+    private async command(value: number): Promise<void> {
+        await this.writeBuf(Buffer.from([0x80, value]))
+    }
+
+    private async display() {
+        this._displaycontrol |= LCD_DISPLAYON
+        await this.command(LCD_DISPLAYCONTROL | this._displaycontrol)
+    }
+
+    async clear() {
+        await this.command(LCD_CLEARDISPLAY) // clear display, set cursor position to zero
+        await delay(2) // this command takes a long time!
+    }
+
+    private async write(value: number) {
+        await this.writeBuf(Buffer.from([0x40, value]))
+    }
+
+    async print(str: string) {
+        for (let i = 0; i < str.length; ++i) {
+            await this.write(str.charCodeAt(i))
+        }
+    }
+}
+
+const board = new XiaoExpansionBoard()
+
+console.log("start...")
+const lcd = new RGBLCD({
+    columns: 16,
+    rows: 2,
+    dotsize: 0,
+    devAddr: LCD_ADDRESS,
+})
+await lcd.init()
+setInterval(async () => {
+    const t = ds.millis() + ""
+    console.log(t)
+    await lcd.clear()
+    await lcd.print(t)
+}, 1000)