netmetr --debug
Checking uuid on the control server...
Sending the following request to https://control.netmetr.cz/RMBTControlServer/settings

{
  "uuid": "<hidden>",
  "language": "en_US",
  "timezone": "CEST",
  "name": "RMBT",
  "terms_and_conditions_accepted": "true",
  "type": "DESKTOP",
  "version_code": "1",
  "version_name": "1.0"
}
response:
{
  "settings": [
    {
      "urls": {
        "url_ipv6_check": "https://ipv6.control.netmetr.cz/RMBTControlServer/ip",
        "control_ipv4_only": "ipv4.control.netmetr.cz",
        "url_ipv4_check": "https://ipv4.control.netmetr.cz/RMBTControlServer/ip",
        "control_ipv6_only": "ipv6.control.netmetr.cz",
        "statistics": "https://www.netmetr.cz/en/stats_app.html"
      },
      "qostesttype_desc": [
        {
          "name": "DNS",
          "test_type": "DNS"
        },
        {
          "name": "Non Transparent Proxy",
          "test_type": "NON_TRANSPARENT_PROXY"
        },
        {
          "name": "HTTP Proxy",
          "test_type": "HTTP_PROXY"
        },
        {
          "name": "Website",
          "test_type": "WEBSITE"
        },
        {
          "name": "UDP",
          "test_type": "UDP"
        },
        {
          "name": "TCP",
          "test_type": "TCP"
        },
        {
          "name": "JITTER",
          "test_type": "JITTER"
        }
      ],
      "versions": {
        "control_server_version": "master_2.0.83-CZ_0.9.28-281-ge83a7a8"
      },
      "history": {
        "devices": [],
        "networks": []
      }
    }
  ],
  "error": []
}
Requesting test config from the control server...
Sending the following request to https://control.netmetr.cz/RMBTControlServer/testRequest

{
  "client": "HW-PROBE",
  "language": "en_US",
  "time": 1594139725000,
  "timezone": "CEST",
  "type": "DESKTOP",
  "uuid": "<hidden>",
  "version": "0.1",
  "version_code": "1"
}
response:
{
  "user_server_selection": false,
  "test_server_address": "ipv4.speed.netmetr.cz",
  "test_server_port": 8081,
  "test_server_name": "CZ.NIC (Prague)",
  "test_server_encryption": false,
  "test_server_type": "RMBT",
  "test_duration": "5",
  "test_numthreads": "3",
  "test_numpings": "10",
  "client_remote_ip": "109.105.51.148",
  "result_url": "https://control.netmetr.cz/RMBTControlServer/result",
  "result_qos_url": "https://control.netmetr.cz/RMBTControlServer/resultQoS",
  "test_token": "<hidden>",
  "test_uuid": "<hidden>",
  "test_id": <hidden>,
  "test_wait": 0,
  "error": []
}
Starting ping test...
ping_1_msec = 9.36
ping_2_msec = 9.68
ping_3_msec = 9.64
ping_4_msec = 9.07
ping_5_msec = 9.36
ping_6_msec = 9.71
ping_7_msec = 9.55
ping_8_msec = 9.12
ping_9_msec = 9.00
ping_10_msec = 9.14
Starting speed test...
==== rmbt 09170aeef ====
connecting...
timeout
could not read from server
timeout
could not read from server
timeout
could not read from server
dl_throughput_mbps = 0.000000
ul_throughput_mbps = 0.000000
Exiting.
Speed test result:
{
  "cnf_file_flows":"\/tmp\/tmppxxves2o.xz"
}
{
  "res_id_test":"<hidden>",
  "res_time_start_s":1594139731,
  "res_time_end_s":1594139761,
  "res_status":"fail_init",
  "res_status_msg":"timeout; could not read from server",
  "res_version_client":"09170aeef",
  "res_encrypt":false,
  "res_tcp_congestion":"cubic",
  "res_uname_sysname":"Linux",
  "res_uname_nodename":"turris",
  "res_uname_release":"4.14.180",
  "res_uname_version":"#0 SMP Wed Jun 3 00:57:44 2020",
  "res_uname_machine":"aarch64"
}

ERROR: Speed measurement failed: 'res_dl_throughput_kbps' missing in result
Download sync code from the control server.
Sending the following request to https://control.netmetr.cz/RMBTControlServer/sync

{
  "language": "en_US",
  "timezone": "CEST",
  "uuid": "<hidden>"
}
response:
{
  "sync": [
    {
      "sync_code": "<hidden>"
    }
  ],
  "error": []
}
Your Sync code is: <hidden>