Getting "CRC does not match!" in nRF Connect iOS mobile application

[Meet]

I am trying to integrate GitHub - NordicSemiconductor/IOS-DFU-Library: OTA DFU Library for Mac and iOS, compatible with nRF5x SoCs library in one of the SwiftUI mobile application. The integration was easy due to really well documentation instructions on the library page. 

I went ahead and tried to load my ZIP file, but it gave me "CRC does not match!" error in the logs, and then DFU process just stuck at aero progress.

Then I tried to load DFU using your app, which is currently on AppStore - nRF Connect for Mobile on the App Store (apple.com), but I got the same log

I am trying to integrate GitHub - NordicSemiconductor/IOS-DFU-Library: OTA DFU Library for Mac and iOS, compatible with nRF5x SoCs (v4.11.1) pod library in one of the SwiftUI mobile application project. The integration was seamless due to really well documentation instructions on the library page. 

I went ahead and tried to load my ZIP file, but it gave me "CRC does not match!" error in the logs, and then DFU process just stuck at zero progress.

Then I tried to load DFU using your app, which is currently on AppStore - nRF Connect for Mobile on the App Store (apple.com), but I got the same error in log (attached TXT version log from nRF iOS app)

Fullscreen 0638.text-9AAE42596C66-1.txt Download

File Name: myDfuFile.zip
Parts: 1
Size: 118 KB
Soft Device Size: Zero KB
Bootloader Size: Zero KB
[Callback] Central Manager did update state to: Powered ON
Connecting to ABDC617280049...
centralManager.connect(peripheral, options: nil)
[Callback] Central Manager did connect peripheral
Connected to ABCD617280049
Discovering services...
peripheral.discoverServices(nil)
Services discovered
Starting Secure DFU...
Connected to ABCD617280049
Services discovered
Secure DFU Service found
Discovering characteristics in DFU Service...
peripheral.discoverCharacteristics(nil, for: FE59)
DFU characteristics discovered
MTU set to 43
Enabling notifications for 8EC90001-F315-4F60-9FB8-838830DAEA50...
peripheral.setNotifyValue(true, for: 8EC90001-F315-4F60-9FB8-838830DAEA50)
Notifications enabled for 8EC90001-F315-4F60-9FB8-838830DAEA50
Secure DFU Control Point notifications enabled
Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50...
peripheral.writeValue(0x0601, for: 8EC90001-F315-4F60-9FB8-838830DAEA50, type: .withResponse)
Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50
Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600601000100000000000000000000
Command object selected (Max size = 256, Offset = 0, CRC = 00000000) received
Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50...
peripheral.writeValue(0x010143000000, for: 8EC90001-F315-4F60-9FB8-838830DAEA50, type: .withResponse)
Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50
Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101
Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50...
peripheral.writeValue(0x020000, for: 8EC90001-F315-4F60-9FB8-838830DAEA50, type: .withResponse)
Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50
Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600201
Packet Receipt Notif disabled (Op Code = 2, Value = 0)
Writing to characteristic 8EC90002-F315-4F60-9FB8-838830DAEA50...
peripheral.writeValue(0x0a410801123d080110888ef9371a028c0120002800300038b097074224080312203d06d39007b6f8, for: 8EC90002-F315-4F60-9FB8-838830DAEA50, type: .withoutResponse)
Writing to characteristic 8EC90002-F315-4F60-9FB8-838830DAEA50...
peripheral.writeValue(0xb6af2ee12083d0e564d22e9a734e6d00201d98841f830d4a604800, for: 8EC90002-F315-4F60-9FB8-838830DAEA50, type: .withoutResponse)
Command object sent (CRC = AAF6B2D4)
Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50...
peripheral.writeValue(0x03, for: 8EC90001-F315-4F60-9FB8-838830DAEA50, type: .withResponse)
Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50
Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 6003010000000000000000
Checksum (Offset = 0, CRC = 00000000) received
CRC does not match! Retrying...
Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50...
peripheral.writeValue(0x010143000000, for: 8EC90001-F315-4F60-9FB8-838830DAEA50, type: .withResponse)
Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50
Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101
Writing to characteristic 8EC90002-F315-4F60-9FB8-838830DAEA50...
peripheral.writeValue(0x0a410801123d080110888ef9371a028c0120002800300038b097074224080312203d06d39007b6f8, for: 8EC90002-F315-4F60-9FB8-838830DAEA50, type: .withoutResponse)
Writing to characteristic 8EC90002-F315-4F60-9FB8-838830DAEA50...
peripheral.writeValue(0xb6af2ee12083d0e564d22e9a734e6d00201d98841f830d4a604800, for: 8EC90002-F315-4F60-9FB8-838830DAEA50, type: .withoutResponse)
Command object sent (CRC = AAF6B2D4)
Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50...
peripheral.writeValue(0x03, for: 8EC90001-F315-4F60-9FB8-838830DAEA50, type: .withResponse)
Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50
Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 6003010000000000000000
Checksum (Offset = 0, CRC = 00000000) received
CRC does not match! Retrying...
Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50...
peripheral.writeValue(0x010143000000, for: 8EC90001-F315-4F60-9FB8-838830DAEA50, type: .withResponse)
Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50
Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 600101
Writing to characteristic 8EC90002-F315-4F60-9FB8-838830DAEA50...
peripheral.writeValue(0x0a410801123d080110888ef9371a028c0120002800300038b097074224080312203d06d39007b6f8, for: 8EC90002-F315-4F60-9FB8-838830DAEA50, type: .withoutResponse)
Writing to characteristic 8EC90002-F315-4F60-9FB8-838830DAEA50...
peripheral.writeValue(0xb6af2ee12083d0e564d22e9a734e6d00201d98841f830d4a604800, for: 8EC90002-F315-4F60-9FB8-838830DAEA50, type: .withoutResponse)
Command object sent (CRC = AAF6B2D4)
Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50...
peripheral.writeValue(0x03, for: 8EC90001-F315-4F60-9FB8-838830DAEA50, type: .withResponse)
Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50
Notification received from 8EC90001-F315-4F60-9FB8-838830DAEA50, value (0x): 6003010000000000000000
Checksum (Offset = 0, CRC = 00000000) received
CRC does not match!
Writing to characteristic 8EC90001-F315-4F60-9FB8-838830DAEA50...
peripheral.writeValue(0x0c, for: 8EC90001-F315-4F60-9FB8-838830DAEA50, type: .withResponse)
Data written to 8EC90001-F315-4F60-9FB8-838830DAEA50

I also tried nRF Connect Android app from Play Store, with same BLE device and same ZIP file, it worked!

I am not sure why iOS DFU library or nRF Connect iOS app giving CRC error.

Any help would be appreciated.

I have tested this on iPod Touch (iOS 14.8)

[Charlie]

Hi Meet, 

The CRC = 00000000 looks not usual. I am not sure if your ZIP file has any issues.

Following BLE Secure DFU sample, I tested nRF Connect for Mobile on the App Store (apple.com) with the DFU sample images from nRF5_SDK_17.1.0_ddde560\nRF5_SDK_17.1.0_ddde560\examples\dfu\secure_dfu_test_images\ble\nrf52840 on an iPhone 11 and it works without issue. Can you repeat the test?

1. Program sd_s140_bootloader_buttonless_with_setting_page_dfu_secure_ble_debug_without_bonds.hex with nRF Connect for Desktop->Programmer app.

2. DFU hrs_application_s1xx.zip through iOS nRF Connect app. 

Best regards,

Charlie

[Meet]

Hi Charlie,

Thanks for your response.

I am new to loading/programming .hex files to my nRF52 chip. I was able to install nRF Desktop tools and also the programmer app on my mac. Also, fixed the JLink error using the SEGGER. Do you know where exactly can I find the .hex file you mentioned?

[Charlie]

It is located in nRF5_SDK_17.1.0_ddde560\nRF5_SDK_17.1.0_ddde560\examples\dfu\secure_dfu_test_images\ble\nrf52840\sd_s140_bootloader_buttonless_with_setting_page_dfu_secure_ble_debug_without_bonds.hex.

nRF5 SDK downloads - nordicsemi.com

Best regards,

Charlie

[Meet]

Thank you, I found it with your help. When I drag and drop that file in Programmer window, it gave me this error shown in below screenshot:

[Charlie]

This firmware is traget to nrf52840DK. You are connecting with an nRF52DK.

Best regards,

Charlie

[Meet]

Unfortunately, I have only this nRF chip device, nRF52DK.