diff --git a/packages/flasher/src/constants.ts b/packages/flasher/src/constants.ts
index e12a3c0..2b2dd3d 100644
--- a/packages/flasher/src/constants.ts
+++ b/packages/flasher/src/constants.ts
@@ -1,5 +1,6 @@
 import { Avr109 } from './protocols/Avr109';
 import { Stk500v1 } from './protocols/Stk500v1';
+import { Stk500v2 } from './protocols/Stk500v2';
 // import { Stk500v2 } from './protocols/Stk500v2';
 
 export const BOARDS = [
@@ -26,24 +27,24 @@ export const BOARDS = [
 			'https://web.archive.org/web/20150813095112/https://www.arduino.cc/en/Main/ArduinoBoardNano',
 		protocol: Stk500v1,
 	},
-	// {
-	// 	name: 'mega',
-	// 	baudRate: 115200,
-	// 	signature: Buffer.from([0x1e, 0x98, 0x01]), // ATmega2560
-	// 	pageSize: 256,
-	// 	delay1: 10,
-	// 	delay2: 1,
-	// 	timeout: 0xc8,
-	// 	stabDelay: 0x64,
-	// 	cmdexeDelay: 0x19,
-	// 	synchLoops: 0x20,
-	// 	byteDelay: 0x00,
-	// 	pollValue: 0x53,
-	// 	pollIndex: 0x03,
-	// 	productIds: ['0042', '6001', '0010', '7523'],
-	// 	productPage: 'https://store.arduino.cc/mega-2560-r3',
-	// 	protocol: Stk500v2,
-	// },
+	{
+		name: 'mega',
+		baudRate: 115200,
+		signature: Buffer.from([0x1e, 0x98, 0x01]), // ATmega2560
+		pageSize: 256,
+		delay1: 10,
+		delay2: 1,
+		timeout: 0xc8,
+		stabDelay: 0x64,
+		cmdexeDelay: 0x19,
+		synchLoops: 0x20,
+		byteDelay: 0x00,
+		pollValue: 0x53,
+		pollIndex: 0x03,
+		productIds: ['0042', '6001', '0010', '7523'],
+		productPage: 'https://store.arduino.cc/mega-2560-r3',
+		protocol: Stk500v2,
+	},
 	{
 		name: 'nano (new bootloader)',
 		baudRate: 115200,
diff --git a/packages/flasher/src/protocols/Avr109.ts b/packages/flasher/src/protocols/Avr109.ts
index d6b58ca..a28e763 100644
--- a/packages/flasher/src/protocols/Avr109.ts
+++ b/packages/flasher/src/protocols/Avr109.ts
@@ -55,7 +55,7 @@ export class Avr109 extends Protocol implements Flasher {
 
 			AVR109.init(
 				this.connection.serialPort,
-				{ signature, debug: true },
+				{ signature, debug: false },
 				async (error: unknown, flasher: any) => {
 					if (error) {
 						reject(error);
diff --git a/packages/flasher/src/protocols/Stk500v1.ts b/packages/flasher/src/protocols/Stk500v1.ts
index dc2faf1..c0d0205 100644
--- a/packages/flasher/src/protocols/Stk500v1.ts
+++ b/packages/flasher/src/protocols/Stk500v1.ts
@@ -24,7 +24,7 @@ export class Stk500v1 extends Protocol implements Flasher {
 
 	private bootload(hex: Buffer) {
 		return new Promise<void>((resolve, reject) => {
-			new STK500({ debug: true }).bootload(
+			new STK500({ debug: false }).bootload(
 				this.connection.serialPort,
 				hex,
 				this.board,
diff --git a/packages/flasher/src/protocols/Stk500v2.ts b/packages/flasher/src/protocols/Stk500v2.ts
index 4139f5c..7169ab9 100644
--- a/packages/flasher/src/protocols/Stk500v2.ts
+++ b/packages/flasher/src/protocols/Stk500v2.ts
@@ -21,19 +21,15 @@ export class Stk500v2 extends Protocol implements Flasher {
 		const hex = this.parseHex(file);
 
 		await this.connection.open();
-		await this.reset();
 		const stk500v2 = new STK500v2(this.connection.serialPort);
 
-		console.log('syncing');
+		await this.reset();
+
 		await this.sync(stk500v2, 5);
-		console.log('synced');
 		await this.verifySignature(stk500v2, this.board.signature);
-		console.log(stk500v2);
-		// await STK500v2.sync(5);
-		// await STK500v2.verifySignature(this.board.signature);
-		// await STK500v2.enterProgrammingMode(this.board);
-		// await STK500v2.upload(hex, this.board.pageSize);
-		// await STK500v2.exitProgrammingMode();
+		await this.enterProgrammingMode(stk500v2, this.board);
+		await this.upload(stk500v2, hex, this.board.pageSize);
+		await this.exitProgrammingMode(stk500v2);
 	}
 
 	private async reset() {
@@ -65,4 +61,43 @@ export class Stk500v2 extends Protocol implements Flasher {
 			});
 		});
 	}
+
+	private async enterProgrammingMode(stk500v2: any, board: Board) {
+		return new Promise<void>((resolve, reject) => {
+			stk500v2.enterProgrammingMode(board, (error: unknown) => {
+				if (error) {
+					reject(error);
+					return;
+				}
+
+				resolve();
+			});
+		});
+	}
+
+	private async upload(stk500v2: any, hex: any, pageSize: number) {
+		return new Promise<void>((resolve, reject) => {
+			stk500v2.upload(hex, pageSize, (error: unknown) => {
+				if (error) {
+					reject(error);
+					return;
+				}
+
+				resolve();
+			});
+		});
+	}
+
+	private async exitProgrammingMode(stk500v2: any) {
+		return new Promise<void>((resolve, reject) => {
+			stk500v2.exitProgrammingMode((error: unknown) => {
+				if (error) {
+					reject(error);
+					return;
+				}
+
+				resolve();
+			});
+		});
+	}
 }
diff --git a/packages/flasher/test.ts b/packages/flasher/test.ts
index a80b364..10ed456 100644
--- a/packages/flasher/test.ts
+++ b/packages/flasher/test.ts
@@ -1,7 +1,10 @@
 import path from 'path';
 import { Flasher } from './src/Flasher';
+import { getConnectedPorts } from './src/serialport';
 
 async function flash() {
+	const ports = await getConnectedPorts();
+	console.log(ports);
 	const board = 'mega';
 	try {
 		const __dirname = path.resolve(path.dirname(''));
@@ -9,7 +12,7 @@ async function flash() {
 			__dirname,
 			`../../apps/electron-app/hex/${board}/StandardFirmata.cpp.hex`,
 		);
-		await new Flasher(board, '/dev/tty.usbmodem1101').flash(filePath);
+		await new Flasher(board, '/dev/tty.usbmodem1401').flash(filePath);
 		console.log('done');
 	} catch (error) {
 		console.log(error);
diff --git a/patches/stk500-v2+1.0.4.patch b/patches/stk500-v2+1.0.4.patch
new file mode 100644
index 0000000..ab6a54b
--- /dev/null
+++ b/patches/stk500-v2+1.0.4.patch
@@ -0,0 +1,32 @@
+diff --git a/node_modules/stk500-v2/index.js b/node_modules/stk500-v2/index.js
+index b379200..faf5156 100644
+--- a/node_modules/stk500-v2/index.js
++++ b/node_modules/stk500-v2/index.js
+@@ -265,10 +265,10 @@ stk500.prototype.loadAddress = function(useaddr, done) {
+   //console.log("load address");
+   var self = this;
+
+-  msb = (useaddr >> 24) & 0xff | 0x80;
+-  xsb = (useaddr >> 16) & 0xff;
+-  ysb = (useaddr >> 8) & 0xff;
+-  lsb = useaddr & 0xff;
++  var msb = (useaddr >> 24) & 0xff | 0x80;
++  var xsb = (useaddr >> 16) & 0xff;
++  var ysb = (useaddr >> 8) & 0xff;
++  var lsb = useaddr & 0xff;
+
+   var cmdBuf = Buffer.from([CMD_LOAD_ADDRESS, msb, xsb, ysb, lsb]);
+
+diff --git a/node_modules/stk500-v2/lib/parser-v2.js b/node_modules/stk500-v2/lib/parser-v2.js
+index 339f8fc..11184bf 100644
+--- a/node_modules/stk500-v2/lib/parser-v2.js
++++ b/node_modules/stk500-v2/lib/parser-v2.js
+@@ -64,7 +64,7 @@ module.exports = function(serialPort){
+       //received. The total timeout period is 200 ms for the CMD_SIGN_ON command, 5
+       //seconds for the CMD_READ/PROGRAM_FLASH/EEPROM commands, and 1
+       //second for all other commands.
+-      timeout = 1000;
++      var timeout = 1000;
+       if(typeByte === c.CMD_SIGN_ON) timeout = 200;
+       else {
+         // grab the constant names.