# Track me WiFi

Track me WiFi is similar to the original mode as it also sends a message when the monitored object starts moving and also sends one when the movement stops and the device does not move for an adjustable time period. All mode-specific events are sent with 3 MAC addresses for better localisation precision.

Track me WiFi

**Hex value:** 0x16

**Use cases:** Tracking luggage, parcels, containers etc.

**Devices that support this mode:** SimplePack Plus

**Required sensors:** Accelerometer, WiFi module

**Mode-specific deltas:**

**Deltas** are mode-specific register values different from *register default values*.

| **Register (hex)** | **Default (hex)** | **Delta (hex)** | **Delta information** |
| ------------------ | ----------------- | --------------- | --------------------- |
| Sleep time (0x04)  | 1 minute (0x41)   | 0 (0x00)        | Sleep time turned off |

**Mode-specific events (uplink messages):**

For more information on what uplink messages (***mode-independent events***) and additional data from various sensors in the device (***appended payload***) can be sent regardless of mode and how to fine-tune message behavior (***alerts***), see *Mode-independent information and events.*

| **Hex** | **Event name**                  | **Alert** | **Event information**                                                                                 |
| ------- | ------------------------------- | --------- | ----------------------------------------------------------------------------------------------------- |
| 8C      | Start of movement with WiFi 1/2 | 1         | <p>Accelerometer-based movement detection,<br>sent with 3 MAC addresses</p>                           |
| 8D      | Start of movement with WiFi 2/2 | 1         |                                                                                                       |
| 8E      | Stop of movement with WiFi 1/2  | 2         | <p>Arrival delay countdown expired,<br>no movement detected anymore,<br>sent with 3 MAC addresses</p> |
| 8F      | Stop of movement with WiFi 2/2  | 2         |                                                                                                       |

**Registers relevant for this mode:**

If you change the **general sensitivity** of the accelerometer and the magnetometer (0x11 and 0x19), respective **axis registers** reset to 0 as the general settings replace them and vice versa.

| **Hex** | **Register name**                | **Default value (hex)** |
| ------- | -------------------------------- | ----------------------- |
| 0x02    | Departure delay                  | 15 seconds (0x0F)       |
| 0x03    | Arrival delay                    | 10 minutes (0x4A)       |
| 0x11    | Accelerometer sensitivity        | 7 (0x07)                |
| 0x12    | Accelerometer X axis sensitivity | 7 (0x07)                |
| 0x13    | Accelerometer Y axis sensitivity | 7 (0x07)                |
| 0x14    | Accelerometer Z axis sensitivity | 7 (0x07)                |
| 0x3C    | Accelerometer measurement period | 1 second (0x01)         |
| 0x49    | Accelerometer detection delay    | 0 seconds (0x00)        |

**Similar modes:**

| **Hex** | **Mode name**         | **Description**                       |
| ------- | --------------------- | ------------------------------------- |
| 0x03    | Track me              | Original version of Track me, no WiFi |
| 0x2B    | Track me WiFi Atlas   | WiFi Atlas version of Track me        |
| 0x52    | Track me WiFi Precise | WiFi Precise version of Track me      |

**Switching to mode, arming and disarming information:**

Follow the *Basic Operations With SimpleHw Devices guide*, where you can also find information about LED behavior, relevant Sigfox messages and more.

Here’s what’s important for **Track me WiFi** messages:

* To set this mode, the downlink needs to include this mode register setting: **0116**
* The uplink messages need to begin with the mode hex as the first byte: **16**
* When arming the device, you should see this message: **1610**
* When the device is armed, it should send you these two bytes: **1611**
* If you disarm the device via long press, you should receive this message: **1614**


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