Just a gathering of notes from my first FOTA test on an nRF51822-mkit, then an nRF51822-EK

A: Prep Platform for FOTA

1. Download the FOTA initial hex file from "Default Bootloader" section of:
   • https://developer.mbed.org/teams/Bluetooth-Low-Energy/wiki/Firmware-Over-the-Air-FOTA-Updates
   • this file includes App, Bootloader, and softdevice, it should be about 279KB
2. Copy the hex file to the *normal* virtual USB drive of your FOTA platform
   • Connect Platform to computer, a virtual drive should appear with file "mbed.htm" (If anything else you are in the wrong mode)
   • When powering up the platform by connecting USB don't press reset or any other buttons
   • drag the hex file to the virtual USB drive
   • wait till the file is fully processed (drive disconnects, then reappears and file is gone
3. disconnect the USB to powerdown the platform, then reconnect to powerup with FOTA
   • LED1 blinks with default app installed
   • Debug available on USB Serial "ping..." (TeraTerm 9600,8N1)
   • You may need to Press reset and/or restart TeraTerm depending on what else you do
4. Use Android App "nRF UART 2.0"
   • Connect to [DefaultApp]
   • Confirm regular "ping" messages
5. Check FOTA:
   • Start Android App "nRF Master Control Panel" (MCP)
   • Connect to device [DefaultApp]
   • There should be 5 services, including Device Firmware update service
     • If not then disconnect and reconnect to refresh the services list (May be caches from your previous tests)
6. To restore non-FOTA operation and mbed virtual drive see "Firmware Update" section in
   • https://developer.mbed.org/platforms/Nordic-nRF51822/
   • reference: https://developer.mbed.org/questions/5222/nRF51822-mkit-Hex-vs-Bin/
   • It may be necessary to powercycle mkit one or twice

B. Compile sample project for FOTA Platform

1. Get to your compiler: https://developer.mbed.org/users/yihui/code/BLE_Default_APP/
   • I had no issues with this today for mkit 2015Jan11
2. Ensure FOTA Platform selected
   • i.e. for the mkit select "Nordic nRF51822 FOTA" (not "Nordic nRF51822 mkit")
3. Modify the main.cpp so you are sure it is your file that is loaded
   • change line: DEBUG("ping\r\n");
   • to custom message : DEBUG("It Worked!\r\n");
4. Compile, save hex file
   • FOTA Hex file should be about 55KB (Application only, no bootloader or softdevice)
   • (Normal mkit non-FOTA hex file should be >250KB)

C. Loading sample project using MCP

1. copy hex file to Android device (Maybe to the folder "Download")
   • Options: Shared folder, copy over USB cable, email to phone, etc.
2. Start MCP
3. Connect to [DefaultApp]
4. Click [DFU] Button, Follow prompts to select Application hex file
   • At this time use "No" for "Init Packet" (Future Feature?)
5. Allow bootloader to process file
   • New project should run automatically after completed

D. Check loaded sample project

1. Use Android App "nRF UART 2.0"
   • Connect to [DefaultApp] (Or whatever you modified it to)
   • Confirm that your modified message is received
2. Use MCP to connect
   • In MCP it may be necessary to disconnect/reconnect to refresh the services for new Project on mkit

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E. FOTA on an nRF51822-EK (Not an mbed platform, but can do mbed using FOTA)

1. Start nRFgo Studio on PC
2. Select the nRF51822-EK
3. Do [Erase All]
4. Select Tab [Program Application]
5. Select the FOTA Initial hex file for the Platform
   • Download the FOTA initial hex file from "Default Bootloader" section of:
     • https://developer.mbed.org/teams/Bluetooth-Low-Energy/wiki/Firmware-Over-the-Air-FOTA-Updates
     • this file includes App, Bootloader, and softdevice, it should be about 279KB.
6. Program then Verify the application
7. Disconnect the USB from the nRF51822-EK
8. Powerup the nRF51822-EK with Battery or USB
9. Continue from Step A5 to B,C,D
   • Serial Debug over BLE works using App nRF UART 2.0
   • LEDs and Buttons may need IO redefinitions

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