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Failure connecting to example.com while running sample: https_client

Jacek Majda

After programming the sample to my nRF9160 DK, I opened the terminal emulator and I observed the following messages:

1. HTTPS client sample started

2. Provisioning certificate

3. Waiting for network..OK

4. Connecting to example.com

5. connect() failed, err 116

I am using the following:

1. nRFD9160 DK v0.8.2

2. Windows10 O.S. version:20H2, OS build:19042.631

3. nRF Connect v 3.7.0

4. nRF Connect SDK v 1.6.1

I attach the log file from the LTE Link Monitor below:

Fullscreen 2021-09-04 log file from the LTE Link Monitor.txt Download 
2021-09-04T19:59:12.600Z INFO Application data folder: C:\Users\Administrator\AppData\Roaming\nrfconnect\pc-nrfconnect-linkmonitor
2021-09-04T19:59:12.840Z DEBUG App pc-nrfconnect-linkmonitor v1.1.10 official
2021-09-04T19:59:12.840Z DEBUG App path: C:\Users\Administrator\.nrfconnect-apps\node_modules\pc-nrfconnect-linkmonitor
2021-09-04T19:59:12.840Z DEBUG nRFConnect 3.7.0, required by the app is (^3.6.0)
2021-09-04T19:59:12.840Z DEBUG nRFConnect path: C:\Users\Administrator\AppData\Local\Programs\nrfconnect\resources\app.asar
2021-09-04T19:59:12.841Z DEBUG HomeDir: C:\Users\Administrator
2021-09-04T19:59:12.841Z DEBUG TmpDir: C:\Users\ADMINI~1\AppData\Local\Temp
2021-09-04T19:59:13.059Z VERBOSE Could not fetch serial number for serial port at COM3
2021-09-04T19:59:20.249Z INFO Modem port is opened
2021-09-04T19:59:39.135Z DEBUG modem << *** Booting Zephyr OS build v2.6.0-rc1-ncs1  ***
2021-09-04T19:59:39.395Z DEBUG modem << Flash regionsDomainPermissions
2021-09-04T19:59:39.399Z DEBUG modem << 00 01 0x00000 0x10000 Securerwxl
2021-09-04T19:59:39.404Z DEBUG modem << 02 31 0x10000 0x100000 Non-Securerwxl
2021-09-04T19:59:39.408Z DEBUG modem << Non-secure callable region 0 placed in flash region 1 with size 32.
2021-09-04T19:59:39.411Z DEBUG modem << SRAM regionDomainPermissions
2021-09-04T19:59:39.413Z DEBUG modem << 00 07 0x00000 0x10000 Securerwxl
2021-09-04T19:59:39.415Z DEBUG modem << 08 31 0x10000 0x40000 Non-Securerwxl
2021-09-04T19:59:39.418Z DEBUG modem << PeripheralDomainStatus
2021-09-04T19:59:39.422Z DEBUG modem << 00 NRF_P0               Non-SecureOK
2021-09-04T19:59:39.424Z DEBUG modem << 01 NRF_CLOCK            Non-SecureOK
2021-09-04T19:59:39.426Z DEBUG modem << 02 NRF_RTC0             Non-SecureOK
2021-09-04T19:59:39.428Z DEBUG modem << 03 NRF_RTC1             Non-SecureOK
2021-09-04T19:59:39.430Z DEBUG modem << 04 NRF_NVMC             Non-SecureOK
2021-09-04T19:59:39.436Z DEBUG modem << 05 NRF_UARTE1           Non-SecureOK
2021-09-04T19:59:39.439Z DEBUG modem << 06 NRF_UARTE2           SecureSKIP
2021-09-04T19:59:39.441Z DEBUG modem << 07 NRF_TWIM2            Non-SecureOK
2021-09-04T19:59:39.443Z DEBUG modem << 08 NRF_SPIM3            Non-SecureOK
2021-09-04T19:59:39.445Z DEBUG modem << 09 NRF_TIMER0           Non-SecureOK
2021-09-04T19:59:39.447Z DEBUG modem << 10 NRF_TIMER1           Non-SecureOK
2021-09-04T19:59:39.465Z DEBUG modem << 11 NRF_TIMER2           Non-SecureOK
2021-09-04T19:59:39.469Z DEBUG modem << 12 NRF_SAADC            Non-SecureOK
2021-09-04T19:59:39.471Z DEBUG modem << 13 NRF_PWM0             Non-SecureOK
2021-09-04T19:59:39.473Z DEBUG modem << 14 NRF_PWM1             Non-SecureOK
2021-09-04T19:59:39.475Z DEBUG modem << 15 NRF_PWM2             Non-SecureOK
2021-09-04T19:59:39.476Z DEBUG modem << 16 NRF_PWM3             Non-SecureOK
2021-09-04T19:59:39.478Z DEBUG modem << 17 NRF_WDT              Non-SecureOK
2021-09-04T19:59:39.480Z DEBUG modem << 18 NRF_IPC              Non-SecureOK
2021-09-04T19:59:39.481Z DEBUG modem << 19 NRF_VMC              Non-SecureOK
2021-09-04T19:59:39.483Z DEBUG modem << 20 NRF_FPU              Non-SecureOK
2021-09-04T19:59:39.487Z DEBUG modem << 21 NRF_EGU1             Non-SecureOK
2021-09-04T19:59:39.489Z DEBUG modem << 22 NRF_EGU2             Non-SecureOK
2021-09-04T19:59:39.491Z DEBUG modem << 23 NRF_DPPIC            Non-SecureOK
2021-09-04T19:59:39.493Z DEBUG modem << 24 NRF_REGULATORS       Non-SecureOK
2021-09-04T19:59:39.494Z DEBUG modem << 25 NRF_PDM              Non-SecureOK
2021-09-04T19:59:39.496Z DEBUG modem << 26 NRF_I2S              Non-SecureOK
2021-09-04T19:59:39.498Z DEBUG modem << 27 NRF_GPIOTE1          Non-SecureOK
2021-09-04T19:59:39.500Z DEBUG modem << SPM: NS image at 0x10000
2021-09-04T19:59:39.503Z DEBUG modem << SPM: NS MSP at 0x20019fb8
2021-09-04T19:59:39.504Z DEBUG modem << SPM: NS reset vector at 0x12b65
2021-09-04T19:59:39.506Z DEBUG modem << SPM: prepare to jump to Non-Secure image.
2021-09-04T19:59:39.508Z DEBUG modem << *** Booting Zephyr OS build v2.6.0-rc1-ncs1  ***
2021-09-04T19:59:39.510Z DEBUG modem << HTTPS client sample started
2021-09-04T19:59:39.703Z DEBUG modem << Provisioning certificate
2021-09-04T20:09:50.981Z DEBUG modem << Waiting for network.. OK
2021-09-04T20:09:51.195Z DEBUG modem << Connecting to example.com
2021-09-04T20:09:51.360Z DEBUG modem << connect() failed, err: 116
2021-09-04T20:32:18.128Z DEBUG modem << *** Booting Zephyr OS build v2.6.0-rc1-ncs1  ***
2021-09-04T20:32:18.148Z DEBUG modem << Flash regionsDomainPermissions
2021-09-04T20:32:18.153Z DEBUG modem << 00 01 0x00000 0x10000 Securerwxl
2021-09-04T20:32:18.162Z DEBUG modem << 02 31 0x10000 0x100000 Non-Securerwxl
2021-09-04T20:32:18.179Z DEBUG modem << Non-secure callable region 0 placed in flash region 1 with size 32.
2021-09-04T20:32:18.197Z DEBUG modem << SRAM regionDomainPermissions
2021-09-04T20:32:18.201Z DEBUG modem << 00 07 0x00000 0x10000 Securerwxl
2021-09-04T20:32:18.206Z DEBUG modem << 08 31 0x10000 0x40000 Non-Securerwxl
2021-09-04T20:32:18.208Z DEBUG modem << PeripheralDomainStatus
2021-09-04T20:32:18.211Z DEBUG modem << 00 NRF_P0               Non-SecureOK
2021-09-04T20:32:18.225Z DEBUG modem << 01 NRF_CLOCK            Non-SecureOK
2021-09-04T20:32:18.228Z DEBUG modem << 02 NRF_RTC0             Non-SecureOK
2021-09-04T20:32:18.230Z DEBUG modem << 03 NRF_RTC1             Non-SecureOK
2021-09-04T20:32:18.232Z DEBUG modem << 04 NRF_NVMC             Non-SecureOK
2021-09-04T20:32:18.234Z DEBUG modem << 05 NRF_UARTE1           Non-SecureOK
2021-09-04T20:32:18.236Z DEBUG modem << 06 NRF_UARTE2           SecureSKIP
2021-09-04T20:32:18.238Z DEBUG modem << 07 NRF_TWIM2            Non-SecureOK
2021-09-04T20:32:18.241Z DEBUG modem << 08 NRF_SPIM3            Non-SecureOK
2021-09-04T20:32:18.243Z DEBUG modem << 09 NRF_TIMER0           Non-SecureOK
2021-09-04T20:32:18.265Z DEBUG modem << 10 NRF_TIMER1           Non-SecureOK
2021-09-04T20:32:18.267Z DEBUG modem << 11 NRF_TIMER2           Non-SecureOK
2021-09-04T20:32:18.269Z DEBUG modem << 12 NRF_SAADC            Non-SecureOK
2021-09-04T20:32:18.270Z DEBUG modem << 13 NRF_PWM0             Non-SecureOK
2021-09-04T20:32:18.272Z DEBUG modem << 14 NRF_PWM1             Non-SecureOK
2021-09-04T20:32:18.273Z DEBUG modem << 15 NRF_PWM2             Non-SecureOK
2021-09-04T20:32:18.274Z DEBUG modem << 16 NRF_PWM3             Non-SecureOK
2021-09-04T20:32:18.275Z DEBUG modem << 17 NRF_WDT              Non-SecureOK
2021-09-04T20:32:18.288Z DEBUG modem << 18 NRF_IPC              Non-SecureOK
2021-09-04T20:32:18.291Z DEBUG modem << 19 NRF_VMC              Non-SecureOK
2021-09-04T20:32:18.292Z DEBUG modem << 20 NRF_FPU              Non-SecureOK
2021-09-04T20:32:18.293Z DEBUG modem << 21 NRF_EGU1             Non-SecureOK
2021-09-04T20:32:18.294Z DEBUG modem << 22 NRF_EGU2             Non-SecureOK
2021-09-04T20:32:18.297Z DEBUG modem << 23 NRF_DPPIC            Non-SecureOK
2021-09-04T20:32:18.301Z DEBUG modem << 24 NRF_REGULATORS       Non-SecureOK
2021-09-04T20:32:18.311Z DEBUG modem << 25 NRF_PDM              Non-SecureOK
2021-09-04T20:32:18.313Z DEBUG modem << 26 NRF_I2S              Non-SecureOK
2021-09-04T20:32:18.314Z DEBUG modem << 27 NRF_GPIOTE1          Non-SecureOK
2021-09-04T20:32:18.316Z DEBUG modem << SPM: NS image at 0x10000
2021-09-04T20:32:18.319Z DEBUG modem << SPM: NS MSP at 0x20019fb8
2021-09-04T20:32:18.321Z DEBUG modem << SPM: NS reset vector at 0x12b65
2021-09-04T20:32:18.323Z DEBUG modem << SPM: prepare to jump to Non-Secure image.
2021-09-04T20:32:18.332Z DEBUG modem << *** Booting Zephyr OS build v2.6.0-rc1-ncs1  ***
2021-09-04T20:32:18.334Z DEBUG modem << HTTPS client sample started
2021-09-04T20:32:18.608Z DEBUG modem << Provisioning certificate
2021-09-04T20:44:24.909Z DEBUG modem << Waiting for network.. OK
2021-09-04T20:44:25.195Z DEBUG modem << Connecting to example.com
2021-09-04T20:44:25.389Z DEBUG modem << connect() failed, err: 116

  • 0

    Hello Markus,

    If I would like to try to connect to a different server, what exactly shall I do?

    1. Which server shall I try to connect to?

    2. If I want to arrange a certificate for a new server, what exactly shall I enter in the address bar of the Google Chrome, before following the procedure of "Exporting the SSL certificate of a website using Google Chrome?

    3. Once I save the certificate for the new server in a file, in which folder shall I place this file?

    4. Currently a certificate for "www.example.com" is provided in the folder: "samples/nrf9160/https_client/cert . Shall I remove/delete this certificate before I try to use a new certificate for a new server?

    5. The sample "https_client" is supposed to connect to "www.example.com".  How will it know that I will be trying to connect to a different server?

    Regards,

    Jacek

  • 0

    Hello Jacek,

    Jacek Majda said:
    1. Which server shall I try to connect to?

    You could try google.com.

    Jacek Majda said:
    2. If I want to arrange a certificate for a new server, what exactly shall I enter in the address bar of the Google Chrome, before following the procedure of "Exporting the SSL certificate of a website using Google Chrome?

    Just enter google.com in your Google Chrome and follow the steps described in this guideline. The only difference here is that you need the DigiCert Global Root CA certificate, which you can export in a similar manner by using the Certification Path instead of the Details tab.

    Afterwards, you manually have to add "\n" to each line in the same way as it is done in the original certificate.

    Jacek Majda said:
    3. Once I save the certificate for the new server in a file, in which folder shall I place this file?

    Just place it in the same folder where the certificate for example.com is stored.

    Jacek Majda said:
    4. Currently a certificate for "www.example.com" is provided in the folder: "samples/nrf9160/https_client/cert . Shall I remove/delete this certificate before I try to use a new certificate for a new server?

    To keep it super simple, I recommend you to rename the original certificate to DigiCertGlobalRootCA.pem.org and then use the same name DigiCertGlobalRootCA.pem for the new certificate.

    Jacek Majda said:
    5. The sample "https_client" is supposed to connect to "www.example.com".  How will it know that I will be trying to connect to a different server?

    In main.c#L184, replace "example.com" with "google.com". Additionally I would recommend to update the HTTP header to:

    #define HTTP_HEAD \
"HEAD / HTTP/1.1\r\n" \
"Host: google.com:443\r\n" \
"Connection: close\r\n\r\n"

    Afterwards, please recompile and flash the application to your device.

    I hope that this will work for you :-)

    Regards,

    Markus

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