User's Manual

Product and Architectural Design information SRT PT-01
Functional description
The Scandinavian Reach Technologies AS SRT PT-01 Personnel tag is a wearable device intended to
report its location within predefined areas. The tag communicates with Scandinavian Reach
Technologies AS Mesh nodes via built-in 2,4 GHz Bluetooth radio.
The Personnel tag includes a pressable button. The function of this button is:
1. To trigger alarm in case of emergency issues.
2. To activate and de-activate the tag.
Further, a LED diode, placed on the upper surface will indicated status of the tag.
Software/Firmware specification
The tag is from factory equipped with firmware which periodically advertise a Bluetooth beacon
message containing:
x The unique address of the tag
x The battery status of the tag
x Button press status
x The temperature of the tag
The firmware also handles how the LED diode is used. Typically indicating power on, low battery and
alarm triggered.
It is not possible to update the firmware after the SRT PT-01 has been produced.
Specification of frequency band(s), power output and power management
The SRT PT-01 operates in the non-licensed 2,4GHz band with the following characteristics.
x 2,4 GHz Bluetooth (2.4 - 2.4835GHz)
x TX power +4 dBm
x Antenna – PCB (1.5dBi gain)
When the SRT PT-01 is not advertising data, it sets itself into sleep mode waiting for the next TX-
interval. This to use as little energy as possible.
Power usage
x ~ 0.4 μA at system off
x ~ 7 mA at +4 dBm