A configuration file that contains the device and service settings.

What is mycroft.conf?

mycroft.conf is a JSON-formatted file that is saved locally on your Mycroft Device, such as Picroft or Mark 1. The mycroft.conf file contains information about the Device itself, like what type of Device and Enclosure it is, as well as information about user preferences. If you haven't specified preferences, then mycroft.conf will contain some default values. Your Device, and Skills installed on your Device, use mycroft.conf to provide additional functionality.

You can edit your mycroft.conf files directly however be very aware that any small syntax error such as a missing comma will prevent the file from being read entirely. In these instances Mycroft may discard the file entirely and generate a fresh copy.

It is recommended to instead use the Mycroft Configuration Manager to make these changes.

pageConfiguration Manager

Where are the mycroft.conf files stored?

The mycroft.conf files are stored in four possible locations:

  1. Default - mycroft-core/mycroft/configuration/mycroft.conf

  2. Remote (from - /var/tmp/mycroft_web_cache.json

  3. System - /etc/mycroft/mycroft.conf

  4. User - $HOME/.mycroft/mycroft.conf

Mycroft implements an order of precedence; settings defined at a User level override those at a System level. If the file does not exist, Mycroft moves to the following level.

A look at the inside of mycroft.conf

Here is an example System level mycroft.conf from a Mark 1 Device:

pi@mark_1:/etc/mycroft $ cat mycroft.conf
  "enclosure": {
    "platform": "mycroft_mark_1",
    "platform_build": 9,
    "port": "/dev/ttyAMA0",
    "rate": 9600,
    "timeout": 5,
    "update": true,
    "test": false
  "VolumeSkill": {
    "default_level": 6,
    "min_volume": 0,
    "max_volume": 83


mycroft_web_cache.json is is a JSON-formatted file that is saved locally on your Mycroft Device, such as Picroft or Mark 1. mycroft_web_cache.json is a cached copy of the settings on your account, such as your Location (which determines Time Zone), which Voice you have selected and your preference for Measurements such as temperature and distance.

Both of these files are regularly used in troubleshooting, so it's useful to know what information they hold, and where they are stored on your Device.

Where is the mycroft_web_cache.json file stored?

This file is stored at:


on the Device.

How is mycroft_web_cache.json updated?

When you update settings at, your Device will periodically pull them down. In normal circumstances any change should be reflected on the device within 1-2 minutes. You can also instruct your device to pull down the latest configuration, by saying:

Hey Mycroft, update configuration

Mycroft will respond in one of two ways:

  • If your configuration was out of date, and has been pulled down again, Mycroft will respond:

Configuration updated

  • If your configuration was the same on your device as on, Mycroft will respond:

Your device has been configured

Reading values directly from mycroft_web_cache.json

To see the city location value:

jq "" < /var/tmp/mycroft_web_cache.json

To see the latitude and longitude coordinates of your location:

jq ".location.coordinate" < /var/tmp/mycroft_web_cache.json

To see the timezone setting:

jq ".location.timezone" < /var/tmp/mycroft_web_cache.json

To see the listener setting:

jq ".listener" < /var/tmp/mycroft_web_cache.json

To see the Speech to Text (STT) settings:

jq ".stt" < /var/tmp/mycroft_web_cache.json

To see the Text to Speech (TTS) settings:

jq ".tts" < /var/tmp/mycroft_web_cache.json

A look at the inside of mycroft_web_cache.json

Here is an example mycroft_web_cache.json. NOTE: Your settings will be different.

  "date_format": "DMY",
  "tts": {
    "google": {
      "created_at": 1504481866992,
      "updated_at": 1514794901075
    "module": "mimic",
    "fatts": {
      "created_at": 1504481866991,
      "updated_at": 1514794900939
    "mimic": {
      "created_at": 1504481866989,
      "voice": "ap",
      "updated_at": 1514794900809
    "espeak": {
      "created_at": 1504481866987,
      "updated_at": 1514794900679
    "marytts": {
      "created_at": 1504481866986,
      "updated_at": 1514794900548
  "opt_in": true,
  "created_at": 1504481866955,
  "updated_at": 1514794898083,
  "listener": {
    "energy_ratio": 1.5,
    "created_at": 1504481866996,
    "updated_at": 1514794901398,
    "channels": 1,
    "sample_rate": 16000,
    "multiplier": 1,
    "threshold": 1e-90,
    "phonemes": "HH EY . M AY K R AO F T",
    "wake_word": "hey mycroft"
  "time_format": "full",
  "skills": {
    "directory": "~/.mycroft/skills",
    "created_at": 1504481866994,
    "updated_at": 1514794901226,
    "stop_threshold": 2
  "stt": {
    "google": {
      "credential": {
        "created_at": 1504481866970,
        "updated_at": 1514794899383
      "created_at": 1504481866970,
      "updated_at": 1514794898989
    "ibm": {
      "credential": {
        "created_at": 1504481866958,
        "updated_at": 1514794898334
      "created_at": 1504481866958,
      "updated_at": 1514794898218
    "mycroft": {
      "credential": {
        "created_at": 1504481866965,
        "updated_at": 1514794898856
      "created_at": 1504481866965,
      "updated_at": 1514794898469
    "module": "mycroft",
    "wit": {
      "credential": {
        "created_at": 1504481866981,
        "updated_at": 1514794900417
      "created_at": 1504481866981,
      "updated_at": 1514794900031
    "openstt": {
      "credential": {
        "created_at": 1504481866976,
        "updated_at": 1514794899900
      "created_at": 1504481866976,
      "updated_at": 1514794899521
  "location": {
    "coordinate": {
      "latitude": -38.149918,
      "created_at": 1504500674753,
      "updated_at": 1504500674753,
      "longitude": 144.361719
    "city": {
      "created_at": 1504500674710,
      "state": {
        "country": {
          "created_at": 1486125571309,
          "code": "AU",
          "name": "Australia",
          "updated_at": 1486125571309
        "created_at": 1489950675941,
        "code": "VIC",
        "name": "Victoria",
        "updated_at": 1489950675941
      "code": "Newtown",
      "name": "Newtown",
      "updated_at": 1504500674710
    "created_at": 1504500674709,
    "updated_at": 1504500674709,
    "timezone": {
      "code": "Australia/Melbourne",
      "name": "Australian Eastern Standard Time (Victoria)",
      "dst_offset": 3600000,
      "created_at": 1489950676105,
      "updated_at": 1489950676105,
      "offset": 36000000
  "enclosure": {
    "created_at": 1504481866997,
    "rate": 9600,
    "updated_at": 1514794901541,
    "timeout": 5,
    "port": "/dev/ttyAMA0"
  "system_unit": "metric"

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