Howen commands

Howen devices (dashcams / MDVRs) configuration commands (via SMS or GPRS).

The document includes some JSON-style command examples you can send to devices through a platform or plain text for sms

Howen SMS Commands

SMS Commands download HOWEN SMS COMMANDS

Howen GPRS Commands

1. Basic commands

Update Timezone to UTC 0

{ 
  "CommandType": "40A0", 
  "Command": { 
    "ss": "timezone_set", 
    "sc": { 
      "clock": { 
        "timezone": "120" 
      } 
    } 
  } 
}

Update APN Settings

{ 
  "CommandType": "40A0", 
  "Command": { 
    "ss": "mobile_network", 
    "sc": { 
      "dialup": { 
        "apn": "internet", 
        "servercode": "*99#", 
        "user": "user", 
        "passwd": "pass" 
      } 
    } 
  } 
}

Update Reporting Server (Example: Dev Environment)

{ 
  "CommandType": "40A0", 
  "Command": { 
    "ss": "reporting_server", 
    "sc": { 
      "server": { 
        "server1": { 
          "mainip": "dev.gpsiot.net", 
          "mainport": "8933" 
        } 
      }, 
      "jtbase": { 
        "protocol2": "2", 
        "gpsinterval2": "30", 
        "enable": "1" 
      } 
    } 
  } 
}

File Upload via FTP (0x4091)
{
  "CommandType": "4091",
  "Command": {
    "ss": "ftp_upload",
    "fn": "/mnt/snap_1.jpg",
    "srv": "ftp.server.com:21",
    "user": "ftpuser",
    "pwd": "ftppass"
  }
}

Update Speed Source

{ 
  "CommandType": "40A0", 
  "Command": { 
    "ss": "update_speed", 
    "sc": { 
      "speed": { 
        "source": "0" 
      } 
    } 
  } 
}

2. Device Control

Restart Device (0x4102)

{ "CommandType": "4102", "Command": { "ss": "restart" } }

Factory Reset (0x4103)

{ "CommandType": "4103", "Command": { "ss": "factory_reset" } }

Upgrade Firmware (0x4102/0x4090 with file)

{
  "CommandType": "4090",
  "Command": {
    "ss": "fw_upgrade",
    "act": "1",
    "ft": "8",
    "fn": "firmware.bin",
    "srv": "your.server.com:21"
  }
}

Format Disk (HDD/SD/USB) (0x4109)

{ "CommandType": "4109", "Command": { "ss": "format", "disk": "sd1" } }

Device Log Request (0x410D)

{ "CommandType": "410D", "Command": { "ss": "log_request" } }

Reset Mileage (0x410E)

{ "CommandType": "410E", "Command": { "ss": "reset_mileage" } }

3. GPS & Tracking

Subscribe GPS + Sensors (0x4040)

{ "CommandType": "4040", "Command": { "ss": "gps_sub", "ct": "65535", "rt": "0" } }

GPS Optimization Switch (0x40A0)

{ "CommandType": "40A0", "Command": { "ss": "gps_opt", "sc": { "switch": "1" } } }

Force Position Upload

{ "CommandType": "40A0", "Command": { "ss": "force_gps" } }

Query External Module (OBD, Fuel, TPMS) (0x4160)
{ "CommandType": "4160", "Command": { "ss": "query_module", "module": "OBD" } }





Satellite Modem Query
{ "CommandType": "4160", "Command": { "ss": "sat_modem_status" } }

4. Alarm & Event Control

Subscribe All Alarms (0x4050)

{ "CommandType": "4050", "Command": { "ss": "alarm_sub", "ct": "65535" } }

Clear Alarms (0x4106)

{ "CommandType": "4106", "Command": { "ss": "clear_alarm" } }

Set Overspeed Alarm

{
  "CommandType": "40A0",
  "Command": {
    "ss": "alarm_settings",
    "sc": {
      "overspeed": { "limit": "100", "duration": "10" }
    }
  }
}

Geofence Upload (0x4090)

{
  "CommandType": "4090",
  "Command": {
    "ss": "geo_conf",
    "ft": "6",
    "fn": "geofence.config",
    "srv": "your.server.com:21",
    "act": "1"
  }
}

Overspeed Alarm

{
  "CommandType": "40A0",
  "Command": {
    "ss": "alarm_settings",
    "sc": {
      "overspeed": {
        "limit": "100",
        "duration": "10"
      }
    }
  }
}

Parking / Idle Alarm
{
  "CommandType": "40A0",
  "Command": {
    "ss": "alarm_settings",
    "sc": {
      "parking": {
        "time": "300"
      }
    }
  }
}

Vibration Alarm
{
  "CommandType": "40A0",
  "Command": {
    "ss": "alarm_settings",
    "sc": {
      "vibration": {
        "sensitivity": "3"
      }
    }
  }
}

Door Alarm (Open/Close)

{
  "CommandType": "40A0",
  "Command": {
    "ss": "alarm_settings",
    "sc": {
      "door": {
        "snapshot": {
          "enable": "1",
          "channels": "3",
          "count": "3",
          "interval": "2"
        },
        "record": {
          "enable": "1",
          "channels": "3",
          "pre_time": "8",
          "post_time": "12"
        }
      }
    }
  }
}

Fatigue Driving Alarm (DMS/ADAS)
{
  "CommandType": "40A0",
  "Command": {
    "ss": "alarm_settings",
    "sc": {
      "fuel": {
        "snapshot": {
          "enable": "1",
          "channels": "2",
          "count": "2",
          "interval": "2"
        },
        "record": {
          "enable": "1",
          "channels": "2",
          "pre_time": "5",
          "post_time": "15"
        }
      }
    }
  }
}
}
Tire Pressure Alarm (TPMS)
{
  "CommandType": "40A0",
  "Command": {
    "ss": "alarm_settings",
    "sc": {
      "tpms": {
        "snapshot": {
          "enable": "1",
          "channels": "1;2",
          "count": "2",
          "interval": "3"
        },
        "record": {
          "enable": "1",
          "channels": "1;2",
          "pre_time": "5",
          "post_time": "20"
        }
      }
    }
  }
}


Subscribe to all Harsh Driving Alarms
{
  "CommandType": "4050",
  "Command": {
    "ss": "alarm_sub",
    "ct": "32768"
  }
}

Harsh Acceleration Threshold
{
  "CommandType": "40A0",
  "Command": {
    "ss": "alarm_settings",
    "sc": {
      "harsh_acceleration": {
        "snapshot": {
          "enable": "1",
          "channels": "1;2",
          "count": "3",
          "interval": "2"
        },
        "record": {
          "enable": "1",
          "channels": "1;2",
          "pre_time": "10",
          "post_time": "20"
        }
      }
    }
  }
}


Harsh Braking Threshold
{
  "CommandType": "40A0",
  "Command": {
    "ss": "alarm_settings",
    "sc": {
      "harsh_braking": {
        "snapshot": {
          "enable": "1",
          "channels": "3",
          "count": "2",
          "interval": "2"
        },
        "record": {
          "enable": "1",
          "channels": "3",
          "pre_time": "8",
          "post_time": "15"
        }
      }
    }
  }
}

Harsh Cornering / Sharp Turn
{
  "CommandType": "40A0",
  "Command": {
    "ss": "alarm_settings",
    "sc": {
      "harsh_turn": {
        "snapshot": {
          "enable": "1",
          "channels": "2;4",
          "count": "2",
          "interval": "2"
        },
        "record": {
          "enable": "1",
          "channels": "2;4",
          "pre_time": "5",
          "post_time": "15"
        }
      }
    }
  }
}


Collision / Crash Detection
{
  "CommandType": "40A0",
  "Command": {
    "ss": "alarm_settings",
    "sc": {
      "collision": {
        "snapshot": {
          "enable": "1",
          "channels": "1;2;3;4",
          "count": "5",
          "interval": "1"
        },
        "record": {
          "enable": "1",
          "channels": "1;2;3;4",
          "pre_time": "15",
          "post_time": "30"
        }
      }
    }
  }
}




Fatigue Driving Alarm (DMS)

{
  "CommandType": "40A0",
  "Command": {
    "ss": "alarm_settings",
    "sc": {
      "fatigue": {
        "snapshot": {
          "enable": "1",
          "channels": "2",
          "count": "5",
          "interval": "1"
        },
        "record": {
          "enable": "1",
          "channels": "2",
          "pre_time": "5",
          "post_time": "15"
        }
      }
    }
  }
}

Harsh Braking Alarm from CH1 & CH3
{
  "CommandType": "40A0",
  "Command": {
    "ss": "alarm_settings",
    "sc": {
      "harsh_braking": {
        "record": {
          "enable": "1",
          "channels": "1;3",
          "pre_time": "10",
          "post_time": "20"
        }
      }
    }
  }
}
 ADAS Alarms (Lane Departure / Forward Collision / Pedestrian Warning)
{
  "CommandType": "40A0",
  "Command": {
    "ss": "alarm_settings",
    "sc": {
      "adas": {
        "snapshot": {
          "enable": "1",
          "channels": "1",
          "count": "3",
          "interval": "1"
        },
        "record": {
          "enable": "1",
          "channels": "1",
          "pre_time": "5",
          "post_time": "15"
        }
      }
    }
  }
}


People Counting Abnormal (Bus/Passenger Alarm).

{
  "CommandType": "40A0",
  "Command": {
    "ss": "alarm_settings",
    "sc": {
      "people_count": {
        "snapshot": {
          "enable": "1",
          "channels": "1;2",
          "count": "2",
          "interval": "2"
        },
        "record": {
          "enable": "1",
          "channels": "1;2",
          "pre_time": "5",
          "post_time": "15"
        }
      }
    }
  }
}



Storage Abnormal (SD/HDD Error)

{
  "CommandType": "40A0",
  "Command": {
    "ss": "alarm_settings",
    "sc": {
      "storage_abnormal": {
        "snapshot": {
          "enable": "1",
          "channels": "1;4",
          "count": "1",
          "interval": "1"
        },
        "record": {
          "enable": "1",
          "channels": "1;4",
          "pre_time": "5",
          "post_time": "10"
        }
      }
    }
  }
}

5. Media / Video

Snapshot (Multi-Channel) (0x4020)

{ "CommandType": "4020", "Command": { "ss": "abcd1234", "cl": "1;2;3", "res": "2" } }

Live Preview Start (0x4010)

{
  "CommandType": "4010",
  "Command": {
    "ss": "live_1234_01_00",
    "si": "1",
    "on": "1",
    "fl": "1;2;3",
    "srv": "your.server.com:9000",
    "ch": "1"
  }
}

Playback by Time (0x4070)

{
  "CommandType": "4070",
  "Command": {
    "ss": "play_1234_01",
    "ch": "1",
    "st": "2025-10-01 08:00:00",
    "et": "2025-10-01 09:00:00"
  }
}

Playback Control (Pause/Resume) (0x4071)

{
  "CommandType": "4071",
  "Command": { "ss": "play_1234_01", "ctrl": "pause" }
}

6. Audio / Voice

Start Intercom (0x4030)

{
  "CommandType": "4030",
  "Command": {
    "ss": "voice_1234_01",
    "ch": "1",
    "wm": "1",
    "srv": "your.server.com:9000"
  }
}

TTS Broadcast (0x410F)

{
  "CommandType": "410F",
  "Command": { "ss": "tts", "text": "Engine is ON, drive safely" }
}

Send Short Message (SMS) (0x410C)

{
  "CommandType": "410C",
  "Command": { "ss": "send_sms", "number": "0712345678", "text": "Test alert" }
}

7. Vehicle Control

Immobilise Vehicle (0x4107)

{ "CommandType": "4107", "Command": { "ss": "vehicle_ctrl", "ctrl": "lock" } }

Enable OSD Speed Overlay (0x410B)

{ "CommandType": "410B", "Command": { "ss": "osd_speed", "switch": "1" } }

G-Sensor Calibration (0x410A)

{ "CommandType": "410A", "Command": { "ss": "gsensor_calibrate" } }

Alcohol Detection Module Control (0x40A0)
{
  "CommandType": "40A0",
  "Command": {
    "ss": "alarm_settings",
    "sc": {
      "alcohol": {
        "snapshot": {
          "enable": "1",
          "channels": "2",
          "count": "3",
          "interval": "1"
        },
        "record": {
          "enable": "1",
          "channels": "2",
          "pre_time": "10",
          "post_time": "20"
        }
      }
    }
  }
}
}

File Search (0x4060)

{ "CommandType": "4060", "Command": { "ss": "file_search", "ft": "1" } }

Driver Info Sync (0x40A0 / 0x4180 family)

{
  "CommandType": "40A0",
  "Command": {
    "ss": "driver_info",
    "sc": {
      "driver": { "name": "John Doe", "card": "1234567890" }
    }
  }
}