Renesas AE-CLOUD1 Factory Reset

Prior to resetting your S5D9 to the factory image, try and debug your connection using this guide. If the board boots, but fails on the network connection, look at this guide.  Your binary may actually be working. Note that you will also see the 3 LEDs flashing for different problems, including if your board connection fails. If you want to continue with a factory reset because you suspect a corrupted or deleted image, you will need the following:


  • S5D9 board
  • USB cable to power S5D9
  • USB cable to power J-Link Lite debugger board
  • JTAG cable to connect debugger board and S5D9 dev board
  • SEGGER J-Link Software - download
  • Factory binary - download


Deleted or Damaged Binary

To intentionally create a problem for testing, I will delete the *.srec file that I updated using the AE-CLOUD1 Over The Air (OTA) tutorial.

With the binary deleted, the board displays 3 flashing LEDs.


Connect Cables

Connect the debugger board to both a USB cable and the JTAG cable that connects to the S5D9. Plug the S5D9 into a USB cable for power. In my test, I am supply power to the S5D9 USB cable from my computer.



Download Factory Binary

Download the binary and save it to your computer.

The file is 1,529 KB and is named s5d9_wifi_ota_app_bootloader_orig_combined.srec

Start J-Flash Lite

Select the three dots to the start the process of finding your device.

Select Renesas from the drop-down menu.

Use the right scroll bar to move through the targets and find R7FS5D97E.

Select OK.

Under Interface, select SWD.

The speed is not critical. I’m selecting 4000.

Press OK.

Under Data File, select the three dots and find the binary you downloaded previously.


Select Open.

Press Program Device.

The file will be downloaded from your computer onto your S5D9 board.

You will see log messages like this:

Downloading C:\Users\craig\Documents\Renesas\AE-CLOUD1\Factory Reset\s5d9_wifi_ota_app_bootloader_orig_combined.srec to R7FS5D97E via SWD-Interface@4000kHz

Programming Thread started.

Device "R7FS5D97E" selected.

Found SWD-DP with ID 0x5BA02477

Found SWD-DP with ID 0x5BA02477

AP-IDR: 0x24770011, Type: AHB-AP

AHB-AP ROM: 0xE00FF000 (Base addr. of first ROM table)

Found Cortex-M4 r0p1, Little endian.

FPUnit: 6 code (BP) slots and 2 literal slots

Debugger initialized successfully.

J-Link: Flash download: Flash programming performed for 2 ranges (655360 bytes)

J-Link: Flash download: Total time needed: 6.438s (Prepare: 0.127s, Compare: 0.093s, Erase: 0.000s, Program: 6.143s, Verify: 0.066s, Restore: 0.007s)

Programming Thread exited

Programming done


Test Board With Factory Binary

Unplug the JTAG cable from the S5D9 board. Plug the WiFi module into the PMOD connector. Power on the board.

There should only be a single green LED on.

Network log shows no errors.

Log into Renesas IoT Sandbox Data Intelligence and check the dashboard.

Congratulations! You can now go back to hacking your board, safe in the knowledge that you can restore the board to the factory binary if you brick your board by loading a corrupted binary.