2 ways to flash arduino

1. Using Android Phone with OTG support
2. Using PC

• Verify or debug arduino

Softwares to Download:

1. Install Arduino Hex Uploader App
2. Download Arduino Keypad Firmware. Unzip the content of the zip file (arduino-keypad-xxxxx.zip).

After downloading the needed softwares, connect the Arduino to your Android phone via OTG. Make sure you enable the OTG setting on your android.

Open Arduino Hex Uploader App and tap the Arduino device in the list. Tap Ok if prompted to Allow Arduino Hex Upload to access USB2.0-serial.

Then Select the Arduino firmware you downloaded (arduino-keypad-xxxxx.hex):

Select the arduino board and tap the icon on the bottom-right to start flashing. Wait for the Upload success message.

Softwares to Download:

1. Install XLoader
2. Download Arduino Keypad Firmware. Unzip the content of the zip file (arduino-keypad-xxxxx.zip).

Connect your arduino to PC and determine the COM Port.

Open Xloader. Select the hex file you downloaded ( arduino-keypad-xxxxx.hex).

Set proper Device and COM PORT.

Set Baud rate: to 115200.

Then click Upload.

• Sometimes the hex uploader will show Upload failed. Verify if the upload is successful by using putty to access the arduino nano serial.
• Use baud rate 115200
• The terminal will show the following logs:

     AdoPiSoft Wireless Subvendo Keypad
     Version:40.1.2