A watch that does not need a phone nearby
A wearable — a watch, a health band, a child's safety terminal, an elder-care terminal — uses LTE Cat.1 or NB-IoT for its own cellular link, voice, GNSS, and vital signs as they happen. A child's watch and an elder's band have to work with no phone in the pocket, so package size, the power budget, and PSM/eDRX are tight. SimtoLink modules for this work are 4G / 5G / NB-IoT, multi-band, in a very small package, with UART and SPI. The company supports 500+ enterprise customers and has connected more than 10 million wearables.
A child's watch, an elder's band, a run, a collar
Those four do not share a battery or a need for voice. These are the usual wearable jobs, and the radio that tends to fit.
Health monitoring for older adults
ECG, fall detection, and blood oxygen go up over NB-IoT or LTE Cat.1. An unusual reading can be pushed to the family, which is what elder care and chronic-condition follow-up need.
Sport and health
A GPS/BeiDou track, heart rate, pace, and calories go to the cloud through the module. The session can sync, be shared, and be read for how the workout went.
A collar that can be found
Location and activity go up through the module, so a pet can be found if it wanders and its activity can be watched from home.
Staff bands
Attendance, location, and health readings join a staff platform through the module. Sites, care homes, and hospitals use that for attendance and for knowing someone is safe.
Outdoor and competition watches
An outdoor watch needs IP68 and a wide temperature range. The module does dual-mode BeiDou/GPS and a long battery, which is what a marathon or a climb asks of it.
What a watch case asks of the module
- Coverage that travels with the person: Several operators and bands are what hold coverage and roaming handover.
- Small, and able to sleep: A watch has little room inside. The module needs a small package, PSM and eDRX, and a long standby.
- Sweat, rain, and weather: Daily wear and outdoor sport want dust and water protection (IP67/IP68) and a wide temperature range.
- The sensors the watch already has: The host MCU and those sensors, over TCP, UDP, MQTT, and CoAP.
- From a sample to volume: SimtoLink modules span 2G, 3G, 4G, and 5G, with documentation, an AT command set, an SDK, and production supply.
Which radio fits a watch that has to talk
How often it reports, the pipe, power, and cost do not line up the same way for a child's watch and an elder's band. Device type, the job, and battery life should decide the module. The rows below are the usual pairing for a wearable.
| Job | Radio | What matters |
|---|---|---|
| Children's watches, sports watches | 4G LTE Cat.1 | VoLTE calls, a live position, a geofence, frequent reports |
| Elderly wristbands, pet collars | NB-IoT | Infrequent reports, very low power, a long battery, cost first |
| Enterprise wristbands, attendance terminals | LTE Cat.1 | Position plus attendance, power against bandwidth, several operators |
| Professional sports and outdoor watches | 4G | A GNSS track, sync as it happens, a wide temperature range, IP68 |
How SimtoLink fits a wearable program
For wearables, the modules are very small and very low power, with technical support 7×24. LTE Cat.1 is the recommendation for a child's watch or a sports watch, where VoLTE and a live report matter. NB-IoT fits an elder's band or a pet collar, which report rarely and have to last. An SDK a watch team can bring up quickly, work with mainstream chip vendors, and a named account manager come with the module.
A wearable is taken from the requirements and the radio choice, through a prototype in the case, and into volume. Documentation, the AT command set, an SDK, and sample code ship with the module, and supply is planned for a production run and for later years. Health devices keep adding units that need their own radio, and the module line will follow that.
How a wearable project usually moves
A wearable project usually moves in this order:
The choice turns on the device (a child's watch wants VoLTE; an elder's band wants very low power), power and size (there is little room inside a watch), and the function (a call, a position, or vital signs). Start with a small batch and check power draw, battery life, and coverage in the actual case. A child's watch or a sports watch should use LTE Cat.1 or 4G. An elder's band or a pet collar can use NB-IoT.
The radio in the case is what health, safety, sport, and staff management stand on. SimtoLink has supplied modules to makers of children's watches, elder bands, and sports watches.