> ## Knowledge Base Index
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> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Streaming and Telemetry Configuration

This article covers common questions about configuring and using Tesla Fleet Telemetry streaming with Teslemetry, including field update frequencies, configuration options, and troubleshooting.

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## Frequently Asked Questions

### Why is my speed sensor not updating frequently?

The update frequency for speed (and other telemetry fields) depends on your configuration settings. By default, the `VehicleSpeed` field may not be set to its minimum interval.

**To get more frequent speed updates:**

1. Go to the [Teslemetry Console](https://teslemetry.com/console) and select your vehicle
2. On the vehicle dashboard, click **Telemetry Configuration** (or visit `/console/vehicle/[vin]/fields` directly)
3. Find the `VehicleSpeed` field in the configuration
4. Set the interval to a value as small as **1 second** (the minimum allowed)

Your change **saves automatically** - the editor shows a pending-delivery warning while the new configuration reaches the vehicle.

### How do I configure telemetry field update frequency?

**Step-by-step configuration:**

1. **Login** to the [Teslemetry Console](https://teslemetry.com/console)
2. **Install the virtual key** if not already installed (required for most vehicles)
3. **Open the vehicle dashboard** by clicking your vehicle, then click **Telemetry Configuration**
4. **Select the fields** you want to stream
5. **Set the interval** for each field (in seconds)

**Changes save automatically.** There is no manual Start/Update button - the field editor applies your changes as you make them and shows a pending-delivery warning until the vehicle has received the new configuration.

### What does "Active" mean for my vehicle?

When a vehicle shows as **Active** in the Teslemetry Console, it means:

1. **Telemetry is configured** - You have selected fields and streaming is set up
2. **The vehicle is set up to send data** - Your vehicle has been configured to transmit telemetry data
3. **The virtual key is installed** (for modern vehicles)

### How does the SSE (Server-Sent Events) connection work?

**Endpoint:** `https://api.teslemetry.com/sse/{vin}` (or leave out VIN for all vehicles)

**Connection behavior:**
* The SSE connection sends a **newline character every 10 seconds** as a keep-alive signal
* Data events are pushed immediately when values change (based on configured intervals)

### Does streaming affect my vehicle's sleep?

No, Fleet Telemetry **does not impact your vehicle's sleep** at all. When your vehicle goes to sleep, telemetry streaming naturally stops.

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## Requirements for Fleet Telemetry

**Vehicle requirements:**
* Modern vehicles must be running firmware **2023.20 or newer**
* Legacy vehicles (pre-2021 Model S/X with MCU 2) must be running firmware **2025.20 or newer**
* Pre-2018 Model S/X vehicles with MCU 1 are **not supported**

**Setup requirements:**
* The Teslemetry **virtual key must be installed** (except for legacy vehicles)
* You must have an active subscription that includes this vehicle
* At least one telemetry field must be selected

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## Related Documentation

* [Telemetry Setup Guide](https://teslemetry.com/docs/getting-started/telemetry)
* [Telemetry Fields Reference](https://teslemetry.com/docs/topics/telemetry-fields)
* [Virtual Key Installation](https://teslemetry.com/docs/topics/virtualkey)