# Fetch system monitor statistics

Get system monitor stats for the selected instruments and time range.

Only supported by Quantum noise monitors.

The maximum date range per request is 31 days. If you request a longer range, the server will respond with an error.

Requires an API key with the data.system:read scope.

Endpoint: GET /data/monitor/stats
Version: 1.0.1
Security: apikey

## Query parameters:

  - `instruments` (array, required)
    Serial numbers of selected instruments
    Example: ["QT123456","QT234567"]

  - `start` (string, required)
    Start date and time for loading a range of data. Must be in UTC.

This uses the ISO8601 format. For example, 2023-01-01T00:00:00Z is 1st January 2023 at midnight UTC.
    Example: "2023-01-01T00:00:00Z"

  - `end` (string, required)
    End date and time for loading a range of data. Must be in UTC.

This uses the ISO8601 format. For example, 2023-01-01T00:00:00Z is 1st January 2023 at midnight UTC.
    Example: "2023-01-31T00:00:00Z"

## Response 200 fields (application/json):

  - `time` (string)
    Time of the sample

  - `instrument` (string)
    Instrument serial number

  - `samplePeriod` (integer)
    Sample period in seconds

  - `cpu` (number)
    CPU usage as a percentage

  - `mem` (number)
    Memory usage in megabytes

  - `cache` (number)
    Memory cache usage in megabytes

  - `temp` (number)
    SoC Temperature in degrees Celsius

  - `voltage` (number)
    Input voltage in volts

  - `disk` (number)
    Disk usage in megabytes

  - `netRx` (number)
    Network usage (receive), total in kilobits

  - `netTx` (number)
    Network usage (transmit), total in kilobits

  - `mTot` (number)
    Total memory size in megabytes

  - `dTot` (number)
    Total disk space in megabytes

  - `lteRsrp` (number,null)
    LTE signal strength

  - `lteRsrq` (number,null)
    LTE signal quality

  - `lteSinr` (number,null)
    LTE signal to noise ratio

  - `lteSignal` (number,null)
    LTE signal quality

  - `ping` (number)
    Ping time in milliseconds

  - `network` (number)
    Network usage, kilobits per second

  - `memoryPercent` (number)
    Memory usage as a percentage

  - `diskPercent` (number)
    Disk usage as a percentage

## Response 401 fields (application/json):

  - `error` (string)
    Error code

  - `description` (string)
    Description of the error

## Response 403 fields (application/json):

  - `error` (string)
    Error code

  - `description` (string)
    Description of the error

## Response 429 fields (application/json):

  - `error` (string)
    Error code

  - `description` (string)
    Description of the error