Data Sheet

36
3.4.3 Mini-TX beacon
The Mini-TX is a TX only beacon, i.e. it can transmit, but cannot
receive ultrasound
Comparison to Beacon HW v4.9:
- Smaller size and lighter: 47x42x15mm & 25g vs.
55x55x33mm & 62g (or 55x55x64mm with antenna)
- TX only, i.e. Mini-TX can only transmit ultrasonic and cannot
receive. Beacon HW v4.9 is dual use: can receive and transmit ultrasonic
- Battery – 250mAh vs. 1000mAh in a regular beacon. But Mini-TX has a new
more efficient ultrasonic TX module, thus, battery lifetime in TX mode is even
superior to the Beacon HW v4.9
- Tested battery lifetime with 8Hz – 96h. With lower update rate – nearly
proportionally longer. Very efficient ultrasonic TX module
- Mini-TX has only USB (virtual UART) output – no additional pins
- Mini-TXs always have embedded IMU – newer and better, but it has 3D
accelerometer and 3D gyroscope, but no magnetometer (which we do not
recommend using indoors anyway, due to magnetic field distortion indoor)
- Embedded antenna – smaller size, but smaller radio coverage ~50m with
regular Modem HW v4.9 as compared with ~100m of Beacon HW v4.9 with
Modem HW v4.9
- Range in ultrasonic is virtually on par with regular Beacon HW v4.9 – up to
30m with Beacon HW v4.9 as RX beacon. At the same time, for example, a
combination of Mini-RX RX beacon + Mini-TX TX provide a better coverage
and a stronger signal, than Beacon HW v4.9 + Beacon HW v4.9
- This HW is for the 868/915MHz band only, i.e. 433MHz is not supported and
not planned