Payload Format of tag L

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

BLE scan (Uplink, Port 3)

*requires firmware version v2.1.1 or higher

Byte	Size	Description	Format
0	2	Scan pointer	uint16
2	1	Total messages	uint8
3	1	#Message	uint8
4-9	6	MAC1	6 x uint8
10	1	RSSI1	int8
…
	6	MACN	6 x uint8
	1	RSSIN	int8

If there are more than 6 BLE Beacons the messages will be split into multiple uplinks.

The Total messages indicate how many uplinks are expected.

and the #Message indicates the current message out of all the uplinks.

Scan pointer is incremented with every measurement.

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	Power off = 0	uint8

GPS Accuracy Booster (Downlink, Port 131)

Byte	Size	Description	Format
0	1	Accuracy enhancement	uint8, s [0..59]

BLE config (Downlink, Port 132)

*requires firmware version v2.1.2 or higher Payloads use big endian data encoding.

Min RSSI value is a signed integer and uses two’s complement for encoding.

If Min RSSI value is 0, there is no filtering applied for RSSI.

If Max beacons is 0, there will be no limit of how many beacons will be sent.

If Scan time is 0, there is no scanning performed on the device.

Byte	Size	Description	Format
0	2	Scan interval	uint16, s
2	1	Scan time	uint8, s
3	1	Max beacons	uint8
4	1	Min. RSSI value	int8
5-14	10	Eddystone Namespace	10x uint8
15-16	2	Accelerometer trigger hold timer	uint16, s
17-18	2	Accelerometer threshold	uint16, mg

BLE on demand (Downlink, Port 133)

*requires firmware version v2.1.2 or higher

Byte	Size	Description	Format
0	1	BLE scan on demand = 1	uint8