There is a question in Test Setp about the buttonless DFU sample using the nRF52832 DK board. (SDK is using 12.3.)

[Aser]

Hi
I am currently testing Buttonless DFU using SDK 12.3, nRF52832 DK.
Example test was conducted first using the DK board, but as you can see in the picture, it will fail. I don't know why.
Is the method wrong?

 

[Hung Bui]

Hi Aser, 

I assume that you didn't see the device advertised as "DFU Targ" after you set it to bootloader mode? What was the behavior after the write ? 

I suspect that the application has crashed, you may want to check if it enters any assert handler or if it resets. 

Have you flashed the bootloader ? Do you have any issue if you test the bootloader (without the buttonless application)?

[Aser]

I realized that I was doing something wrong after all my attempts.
First, mark the "↓x3" button and press the "↑" button.
I realized that I had to choose Request instead of Command in a pop-up window.
But even though I have tried to switch to boot mode countless times through this method, I still use Nordic Buttonless to do it.
:(What should I do?

[Hung Bui]

Hi Aser, 

If you instead click on the DFU button can you do a DFU update  ? The app should detect that it's a buttonless application and perform the DFU buttonless automatically. 

The buttonless application is quite simple. It waits for a write request to write to a flag in flash and then reset to the bootloader. 

You can debug the buttonless application quite easily. You can check if enter_bootloader() is called inside on_ctrlpt_write() when there is a BLE_GATTS_EVT_RW_AUTHORIZE_REQUEST.

Please be aware that SDK v12.3 is pretty old. We changed the way we enter DFU bootloader (using GPREGRET instead of flash ) from SDK v13. The current SDK is v15.3

[Aser]

Hello Bui. Good morning.
I've done a lot of DFU with the DFU Button you mentioned, but it's repeatedly output the same log as an infinite loop.
I don't know why.
When this is resolved, the phone sends a signal to the boot mode and it will be able to apply it to the My Project.
Thank you.

[Aser]

This file is a log of an issue where only the same log I talked about repeatedly is taken and DFU is not going on. This log is from Nordic's nRF Connect app.
Would you please take a look?

Fullscreen Log 2019-08-28 11_37_52.txt Download

nRF Connect, 2019-08-28
Nordic_Buttonless (FE:75:B9:3E:5E:1C)
V	11:36:52.277	Connecting to FE:75:B9:3E:5E:1C...
D	11:36:52.277	gatt = device.connectGatt(autoConnect = false, TRANSPORT_LE)
D	11:36:52.659	[Callback] Connection state changed with status: 0 and new state: CONNECTED (2)
I	11:36:52.659	Connected to FE:75:B9:3E:5E:1C
D	11:36:52.673	[Broadcast] Action received: android.bluetooth.device.action.ACL_CONNECTED
V	11:36:52.682	Discovering services...
D	11:36:52.682	gatt.discoverServices()
D	11:36:53.255	[Callback] Services discovered with status: 0
I	11:36:53.255	Services discovered
V	11:36:53.276	Generic Access (0x1800)
- Device Name [R W] (0x2A00)
- Appearance [R] (0x2A01)
- Peripheral Preferred Connection Parameters [R] (0x2A04)
- Central Address Resolution [R] (0x2AA6)
Generic Attribute (0x1801)
Experimental Buttonless DFU Service (8e400001-f315-4f60-9fb8-838830daea50)
- Experimental Buttonless DFU [N W] (8e400001-f315-4f60-9fb8-838830daea50)
 Client Characteristic Configuration (0x2902)
V	11:36:59.589	Enabling notifications for 8e400001-f315-4f60-9fb8-838830daea50
D	11:36:59.589	gatt.setCharacteristicNotification(8e400001-f315-4f60-9fb8-838830daea50, true)
D	11:36:59.591	gatt.writeDescriptor(00002902-0000-1000-8000-00805f9b34fb, value=0x0100)
I	11:36:59.936	Data written to descr. 00002902-0000-1000-8000-00805f9b34fb, value: (0x) 01-00
A	11:36:59.936	"Notifications enabled" sent
V	11:36:59.947	Notifications enabled for 8e400001-f315-4f60-9fb8-838830daea50
V	11:37:02.588	Writing request to characteristic 8e400001-f315-4f60-9fb8-838830daea50
D	11:37:02.588	gatt.writeCharacteristic(8e400001-f315-4f60-9fb8-838830daea50, value=0x01)
I	11:37:02.932	Notification received from 8e400001-f315-4f60-9fb8-838830daea50, value: (0x) 20-01-01
A	11:37:02.932	"Response for: Enter bootloader
Status: Success" received
I	11:37:02.933	Data written to 8e400001-f315-4f60-9fb8-838830daea50, value: (0x) 20-01-01
A	11:37:02.933	"Response for: Enter bootloader
Status: Success" sent
D	11:37:04.079	[Callback] Connection state changed with status: 19 and new state: DISCONNECTED (0)
W	11:37:04.079	Connection terminated by peer (status 19)
I	11:37:04.079	Disconnected
D	11:37:04.088	gatt.refresh() (hidden)
D	11:37:04.137	[Broadcast] Action received: android.bluetooth.device.action.ACL_DISCONNECTED
D	11:37:17.066	gatt.close()
D	11:37:17.068	wait(200)
V	11:37:17.273	Connecting to FE:75:B9:3E:5E:1C...
D	11:37:17.274	gatt = device.connectGatt(autoConnect = false, TRANSPORT_LE)
D	11:37:19.117	[Callback] Connection state changed with status: 0 and new state: CONNECTED (2)
I	11:37:19.117	Connected to FE:75:B9:3E:5E:1C
D	11:37:19.139	[Broadcast] Action received: android.bluetooth.device.action.ACL_CONNECTED
V	11:37:19.151	Discovering services...
D	11:37:19.151	gatt.discoverServices()
D	11:37:19.863	[Callback] Services discovered with status: 0
I	11:37:19.863	Services discovered
V	11:37:19.874	Generic Access (0x1800)
- Device Name [R W] (0x2A00)
- Appearance [R] (0x2A01)
- Peripheral Preferred Connection Parameters [R] (0x2A04)
- Central Address Resolution [R] (0x2AA6)
Generic Attribute (0x1801)
Experimental Buttonless DFU Service (8e400001-f315-4f60-9fb8-838830daea50)
- Experimental Buttonless DFU [N W] (8e400001-f315-4f60-9fb8-838830daea50)
 Client Characteristic Configuration (0x2902)
------------------------------------------------
V	11:37:27.302	[DFU] DFU service started
V	11:37:27.302	[DFU] Opening file...
I	11:37:27.328	[DFU] Firmware file opened successfully
V	11:37:27.329	[DFU] Connecting to DFU target...
D	11:37:27.330	[DFU] gatt = device.connectGatt(autoConnect = false)
I	11:37:27.333	[DFU] Connected to FE:75:B9:3E:5E:1C
V	11:37:27.334	[DFU] Discovering services...
D	11:37:27.334	[DFU] gatt.discoverServices()
I	11:37:27.336	[DFU] Services discovered
D	11:37:27.349	[DFU] wait(1000)
W	11:37:28.359	[DFU] Application with buttonless update found
V	11:37:28.360	[DFU] Jumping to the DFU Bootloader...
V	11:37:28.360	[DFU] Enabling notifications for 8e400001-f315-4f60-9fb8-838830daea50
D	11:37:28.360	[DFU] gatt.setCharacteristicNotification(8e400001-f315-4f60-9fb8-838830daea50, true)
D	11:37:28.360	[DFU] gatt.writeDescriptor(00002902-0000-1000-8000-00805f9b34fb, value=0x01-00)
I	11:37:28.695	[DFU] Data written to descr.8e400001-f315-4f60-9fb8-838830daea50, value (0x): 01-00
V	11:37:28.696	[DFU] Notifications enabled for 8e400001-f315-4f60-9fb8-838830daea50
A	11:37:28.696	[DFU] Notifications enabled
D	11:37:28.696	[DFU] wait(1000)
V	11:37:29.737	[DFU] Writing to characteristic 8e400001-f315-4f60-9fb8-838830daea50
D	11:37:29.737	[DFU] gatt.writeCharacteristic(8e400001-f315-4f60-9fb8-838830daea50)
I	11:37:30.158	[DFU] Notification received from 8e400001-f315-4f60-9fb8-838830daea50, value (0x): 20-01-01
A	11:37:30.158	[DFU] Enter bootloader sent (Op Code = 1)
A	11:37:30.158	[DFU] Response received (Op Code = 1, Status = 1)
D	11:37:31.258	[Callback] Connection state changed with status: 19 and new state: DISCONNECTED (0)
W	11:37:31.258	Connection terminated by peer (status 19)
I	11:37:31.258	Disconnected
D	11:37:31.263	gatt.refresh() (hidden)
I	11:37:31.294	[DFU] Disconnected by the remote device
D	11:37:31.294	[DFU] gatt.refresh() (hidden)
D	11:37:31.294	[DFU] gatt.close()
V	11:37:31.294	[DFU] Scanning for the DFU Bootloader...
D	11:37:31.308	[Broadcast] Action received: android.bluetooth.device.action.ACL_DISCONNECTED
D	11:37:31.326	[DFU] [Broadcast] Action received: android.bluetooth.device.action.ACL_DISCONNECTED
I	11:37:31.554	[DFU] DFU Bootloader found with address FE:75:B9:3E:5E:1C
------------------------------------------------
V	11:37:31.585	[DFU] DFU service started
I	11:37:31.585	[DFU] Firmware file opened successfully
D	11:37:31.585	[DFU] wait(1000)
D	11:37:32.599	[DFU] wait(1000)
V	11:37:33.597	[DFU] Connecting to DFU target...
D	11:37:33.642	[DFU] gatt = device.connectGatt(autoConnect = false)
I	11:37:33.933	[DFU] Connected to FE:75:B9:3E:5E:1C
V	11:37:33.933	[DFU] Discovering services...
D	11:37:33.933	[DFU] gatt.discoverServices()
D	11:37:33.933	[Broadcast] Action received: android.bluetooth.device.action.ACL_CONNECTED
D	11:37:33.948	[DFU] [Broadcast] Action received: android.bluetooth.device.action.ACL_CONNECTED
I	11:37:34.525	[DFU] Services discovered
D	11:37:34.555	[DFU] wait(1000)
W	11:37:35.542	[DFU] Application with buttonless update found
V	11:37:35.542	[DFU] Jumping to the DFU Bootloader...
V	11:37:35.542	[DFU] Enabling notifications for 8e400001-f315-4f60-9fb8-838830daea50
D	11:37:35.542	[DFU] gatt.setCharacteristicNotification(8e400001-f315-4f60-9fb8-838830daea50, true)
D	11:37:35.542	[DFU] gatt.writeDescriptor(00002902-0000-1000-8000-00805f9b34fb, value=0x01-00)
I	11:37:35.640	[DFU] Data written to descr.8e400001-f315-4f60-9fb8-838830daea50, value (0x): 01-00
V	11:37:35.640	[DFU] Notifications enabled for 8e400001-f315-4f60-9fb8-838830daea50
A	11:37:35.640	[DFU] Notifications enabled
D	11:37:35.640	[DFU] wait(1000)
V	11:37:36.659	[DFU] Writing to characteristic 8e400001-f315-4f60-9fb8-838830daea50
D	11:37:36.660	[DFU] gatt.writeCharacteristic(8e400001-f315-4f60-9fb8-838830daea50)
I	11:37:36.750	[DFU] Notification received from 8e400001-f315-4f60-9fb8-838830daea50, value (0x): 20-01-01
A	11:37:36.750	[DFU] Enter bootloader sent (Op Code = 1)
A	11:37:36.750	[DFU] Response received (Op Code = 1, Status = 1)
I	11:37:37.186	[DFU] Disconnected by the remote device
D	11:37:37.186	[DFU] gatt.refresh() (hidden)
D	11:37:37.186	[DFU] gatt.close()
V	11:37:37.186	[DFU] Scanning for the DFU Bootloader...
D	11:37:37.212	[Broadcast] Action received: android.bluetooth.device.action.ACL_DISCONNECTED
D	11:37:37.235	[DFU] [Broadcast] Action received: android.bluetooth.device.action.ACL_DISCONNECTED
I	11:37:37.482	[DFU] DFU Bootloader found with address FE:75:B9:3E:5E:1C
------------------------------------------------
V	11:37:37.514	[DFU] DFU service started
I	11:37:37.514	[DFU] Firmware file opened successfully
D	11:37:37.514	[DFU] wait(1000)
D	11:37:38.512	[DFU] wait(1000)
V	11:37:39.509	[DFU] Connecting to DFU target...
D	11:37:39.557	[DFU] gatt = device.connectGatt(autoConnect = false)
I	11:37:44.129	[DFU] Connected to FE:75:B9:3E:5E:1C
V	11:37:44.129	[DFU] Discovering services...
D	11:37:44.129	[DFU] gatt.discoverServices()
D	11:37:44.139	[Broadcast] Action received: android.bluetooth.device.action.ACL_CONNECTED
D	11:37:44.154	[DFU] [Broadcast] Action received: android.bluetooth.device.action.ACL_CONNECTED
I	11:37:44.900	[DFU] Services discovered
D	11:37:44.924	[DFU] wait(1000)
W	11:37:45.915	[DFU] Application with buttonless update found
V	11:37:45.915	[DFU] Jumping to the DFU Bootloader...
V	11:37:45.915	[DFU] Enabling notifications for 8e400001-f315-4f60-9fb8-838830daea50
D	11:37:45.915	[DFU] gatt.setCharacteristicNotification(8e400001-f315-4f60-9fb8-838830daea50, true)
D	11:37:45.915	[DFU] gatt.writeDescriptor(00002902-0000-1000-8000-00805f9b34fb, value=0x01-00)
I	11:37:46.013	[DFU] Data written to descr.8e400001-f315-4f60-9fb8-838830daea50, value (0x): 01-00
V	11:37:46.013	[DFU] Notifications enabled for 8e400001-f315-4f60-9fb8-838830daea50
A	11:37:46.013	[DFU] Notifications enabled
D	11:37:46.013	[DFU] wait(1000)
V	11:37:47.057	[DFU] Writing to characteristic 8e400001-f315-4f60-9fb8-838830daea50
D	11:37:47.061	[DFU] gatt.writeCharacteristic(8e400001-f315-4f60-9fb8-838830daea50)
I	11:37:47.122	[DFU] Notification received from 8e400001-f315-4f60-9fb8-838830daea50, value (0x): 20-01-01
A	11:37:47.122	[DFU] Enter bootloader sent (Op Code = 1)
A	11:37:47.122	[DFU] Response received (Op Code = 1, Status = 1)
I	11:37:47.575	[DFU] Disconnected by the remote device
D	11:37:47.575	[DFU] gatt.refresh() (hidden)
D	11:37:47.575	[DFU] gatt.close()
V	11:37:47.575	[DFU] Scanning for the DFU Bootloader...
D	11:37:47.585	[Broadcast] Action received: android.bluetooth.device.action.ACL_DISCONNECTED
D	11:37:47.604	[DFU] [Broadcast] Action received: android.bluetooth.device.action.ACL_DISCONNECTED
I	11:37:47.873	[DFU] DFU Bootloader found with address FE:75:B9:3E:5E:1C
------------------------------------------------
V	11:37:47.889	[DFU] DFU service started
I	11:37:47.889	[DFU] Firmware file opened successfully
D	11:37:47.889	[DFU] wait(1000)
D	11:37:48.890	[DFU] wait(1000)
V	11:37:49.906	[DFU] Connecting to DFU target...
D	11:37:49.947	[DFU] gatt = device.connectGatt(autoConnect = false)