Payload Format of tag S
Uplinks
WiFi Packet (Uplink, Port 5)
| Byte | Size | Description | Format |
|---|
| 0 | 1 | Status[6:2] + Moving flag[0] (moving = 1) | uint8 |
| 1-6 | 6 | MAC1 | 6 x uint8 |
| 7 | 1 | RSSI1 | int8 |
| … | | | |
| 6 | MACN | 6 x uint8 |
| 1 | RSSIN | int8 |
GPS Location (Uplink, Port 1)
| Byte | Size | Description | Format |
|---|
| 0 | 1 | Status[6:2] + Moving flag[0] (moving = 1) | uint8 |
| 1-4 | 4 | Latitude | int32, 1/1’000’000 deg |
| 5-8 | 4 | Longitude | int32, 1/1’000’000 deg |
| 9-10 | 2 | Altitude | uint16, 1/10 meter |
| 11 | 1 | Year | uint8, year after 2000 |
| 12 | 1 | Month | uint8, [1..12] |
| 13 | 1 | Day | uint8, [1..31] |
| 14 | 1 | Hour | [0..23] |
| 15 | 1 | Minute | [0..59] |
| 16 | 1 | Second | [0..59] |
GPS No Location (Uplink, Port 2)
| Byte | Size | Description | Format |
|---|
| 0 | 1 | Status[6:2] + Moving flag[0] (moving = 1) | uint8 |
Battery Packet (Uplink, Port 15)
| Byte | Size | Description | Format |
|---|
| 0 | 1 | Status[6:2] + Low battery flag[0] (low = 1) | uint8 |
| 1-2 | 2 | Battery voltage | uint16, mV |
Status[6:2]
Status is only sent after a Config Downlink as an acknowledgement in the next Uplink. 4 bit [6:3] conf_change_id plus 1 bit [2] for success (=1) or failure (=0). conf_change_id counter resets after reaching 15 (1111).
Current Config/Status Packet (Uplink, Port 4)
| Byte | Size | Description | Format |
|---|
| 0-3 | 4 | Localization interval while moving, IM | uint32, s |
| 4-7 | 4 | Localization interval while steady, IS | uint32, s |
| 8-11 | 4 | Config/Status interval, IC | uint32, s |
| 12-13 | 2 | GPS timeout while waiting for fix | uint16, s |
| 14-15 | 2 | Accelerometer wakeup threshold | uint16, mg |
| 16-17 | 2 | Accelerometer delay | uint16, ms |
| 18 | 1 | Device state (moving = 1, steady = 2) | uint8 |
| 19-21 | 3 | Firmware version (major,;minor; patch) | 3 x uint8 |
| 22-23 | 2 | Hardware version (type; revision) | 2 x uint8 |
| 24-27 | 4 | Battery “keep-alive” message interval, IB | uint32, s |
| Byte | Size | Description | Format |
|---|
| 0 | 1 | In case of a button-press 0x01 is sent | uint8 |
Downlinks
Set Config Packet (Downlink, Port 128)
*Bytes only available with firmware version 3.x.x or higher.
Default values for Batch size is 10, for the buffer size it is 8128 (maximum amount of data that can be buffered).
| Byte | Size | Description | Format |
|---|
| 0 | 1 | BLE (disable = 0, enable = 1) | uint8 |
| 1 | 1 | GPS (disable = 0, enable = 1) | uint8 |
| 2 | 1 | WiFi (disable = 0, enable = 1) | uint8 |
| 3-6 | 4 | Localization interval while moving, IM | uint32, s |
| 7-10 | 4 | Localization interval while steady, IS | uint32, s |
| 11-14 | 4 | Hearbeat interval, IH | uint32, s |
| 15-16 | 2 | GPS timeout while waiting for fix | uint16, s |
| 17-18 | 2 | Accelerometer wakeup threshold | uint16, mg |
| 19-20 | 2 | Accelerometer delay | uint16, ms |
| 21-24 | 4 | Battery “keep-alive” message interval, IB | uint32, s |
| 25-26* | 2 | Batch size | uint16 |
| 27-28* | 2 | Buffer size | uint16 |
Buzzer Packet (Downlink, Port 129)
| Byte | Size | Description | Format |
|---|
| 0 | 1 | Time to buzz (buzzer off = 0) | uint8, s |
Off Packet (Downlink, Port 130)
| Byte | Size | Description | Format |
|---|
| 0 | 1 | Power off = 0 | uint8 |
GPS Accuracy Booster (Downlink, Port 131)
| Byte | Size | Description | Format |
|---|
| 0 | 1 | Accuracy enhancement | uint8, s [0..59] |