Payload Format of tag S
Uplinks
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).
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 |
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 |
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 |
Button Alarm Packet (Uplink, Port 6)
| Byte | Size | Description | Format |
|---|---|---|---|
| 0 | 1 | In case of a button-press 0x01 is sent | 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 |
Downlinks
Set Config Packet (Downlink, Port 128)
| 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 |
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 | 0x00 - Off | uint8 |
GPS Accuracy Booster (Downlink, Port 131)
| Byte | Size | Description | Format |
|---|---|---|---|
| 0 | 1 | Accuracy enhancement | uint8, s [0..59] |