---
title: monitor.from() function
description: >
  `monitor.from()` retrieves check statuses stored in the `statuses` measurement in the
  `_monitoring` bucket.
menu:
  flux_v0_ref:
    name: monitor.from
    parent: influxdata/influxdb/monitor
    identifier: influxdata/influxdb/monitor/from
weight: 301
---

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`monitor.from()` retrieves check statuses stored in the `statuses` measurement in the
`_monitoring` bucket.



##### Function type signature

```js
(
    start: A,
    ?fn: (
        r: {
            B with
            _value: C,
            _time: time,
            _stop: time,
            _start: time,
            _measurement: string,
            _field: string,
        },
    ) => bool,
    ?stop: D,
) => stream[E] where E: Record
```

{{% caption %}}
For more information, see [Function type signatures](/flux/v0/function-type-signatures/).
{{% /caption %}}

## Parameters

### start
({{< req >}})
Earliest time to include in results.

Use a relative duration, absolute time, or integer (Unix timestamp in seconds).
For example, `-1h`, `2019-08-28T22:00:00Z`, or `1567029600`.
Durations are relative to `now()`.

### stop

Latest time to include in results. Default is `now()`.

Use a relative duration, absolute time, or integer (Unix timestamp in seconds).
For example, `-1h`, `2019-08-28T22:00:00Z`, or `1567029600`.
Durations are relative to `now()`

### fn

Predicate function that evaluates true or false.

Records or rows (`r`) that evaluate to `true` are included in output tables.
Records that evaluate to _null_ or `false` are not included in output tables.


## Examples

### View critical check statuses from the last hour

```js
import "influxdata/influxdb/monitor"

monitor.from(start: -1h, fn: (r) => r._level == "crit")

```