Hi everyone,
First, a thank you. Over the past weeks this forum answered things I could not have figured out on my own: that the Chinese 4G watches speak the watch protocol on port 5093 and that their SOS button arrives as an sos alarm; that BLE beacons cannot be separate devices and have to come in as attributes of the reader's position; and the current state of Apple Watch support. That saved me weeks of dead ends.
Context: I'm building a panic-button system on top of Traccar for people under threat, for institutional use (court security / judicial police response). The form-factor reference is invisaWear — a small discreet wearable, pendant or keychain, with a hidden button. The problem is that invisaWear and everything in that class is Bluetooth: the device is only a button, and all the location and connectivity comes from a paired phone. In my scenario the phone is precisely what gets taken, dropped or smashed, so a BLE-only button is worthless.
What I'm looking for is a device that:
has its own GNSS and its own cellular connection (Cat 1 or Cat M1, own SIM) — nothing depending on a paired phone;
has a physical SOS button that raises an alarm event, not just periodic positions;
runs on a rechargeable battery and is small enough to be worn discreetly — not a vehicle tracker, and not a wrist watch;
speaks a protocol Traccar already supports (gt06, gl200, osmand, …).
The closest I've found are the Queclink GL320M / GL320MG (personal tracker with SOS, gl200, port 5004) and the Concox/Jimi PT30 class. Those work, but they are "personal trackers" in the pocket-device sense, not wearables in the invisaWear sense. On the small side, the Mictrack MT710 is tiny but has no SOS button.
So, two questions:
Is there a device I'm missing? Small wearable form factor, own 4G + GNSS, SOS button, rechargeable battery, Traccar-compatible.
Has anyone here built one? I'm talking to a hardware house about a custom board (MCU + modem + GNSS + button, reporting over OsmAnd on port 5055). I'd much rather learn from someone who already went through it. The parts I expect to hurt are battery life with the modem registered while mostly asleep, antenna performance in a small plastic body worn against the body, accidental-trigger handling on the button, and time-to-first-fix after a long sleep.
Any pointer is welcome, including "we tried and it failed because X".
Thanks again for this project.
Hi everyone,
First, a thank you. Over the past weeks this forum answered things I could not have figured out on my own: that the Chinese 4G watches speak the watch protocol on port 5093 and that their SOS button arrives as an sos alarm; that BLE beacons cannot be separate devices and have to come in as attributes of the reader's position; and the current state of Apple Watch support. That saved me weeks of dead ends.
Context: I'm building a panic-button system on top of Traccar for people under threat, for institutional use (court security / judicial police response). The form-factor reference is invisaWear — a small discreet wearable, pendant or keychain, with a hidden button. The problem is that invisaWear and everything in that class is Bluetooth: the device is only a button, and all the location and connectivity comes from a paired phone. In my scenario the phone is precisely what gets taken, dropped or smashed, so a BLE-only button is worthless.
What I'm looking for is a device that:
has its own GNSS and its own cellular connection (Cat 1 or Cat M1, own SIM) — nothing depending on a paired phone;
has a physical SOS button that raises an alarm event, not just periodic positions;
runs on a rechargeable battery and is small enough to be worn discreetly — not a vehicle tracker, and not a wrist watch;
speaks a protocol Traccar already supports (gt06, gl200, osmand, …).
The closest I've found are the Queclink GL320M / GL320MG (personal tracker with SOS, gl200, port 5004) and the Concox/Jimi PT30 class. Those work, but they are "personal trackers" in the pocket-device sense, not wearables in the invisaWear sense. On the small side, the Mictrack MT710 is tiny but has no SOS button.
So, two questions:
Is there a device I'm missing? Small wearable form factor, own 4G + GNSS, SOS button, rechargeable battery, Traccar-compatible.
Has anyone here built one? I'm talking to a hardware house about a custom board (MCU + modem + GNSS + button, reporting over OsmAnd on port 5055). I'd much rather learn from someone who already went through it. The parts I expect to hurt are battery life with the modem registered while mostly asleep, antenna performance in a small plastic body worn against the body, accidental-trigger handling on the button, and time-to-first-fix after a long sleep.
Any pointer is welcome, including "we tried and it failed because X".
Thanks again for this project.