USER MANUAL
STM 550B / EMSIB - EASYFIT MULTISENSOR FOR IOT APPLICATIONS (2.4 GHZ BLE)
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F-710-017, V1.0
STM 550B / EMSIB User Manual | v1.3 | June 2020 | Page 9 / 115
1.3
Technical data
Antenna
Integrated antenna
Transmission power (at antenna base)
+4 dBm
Communication range (guidance only)
30 m line of sight / 10 m indoor environment
Communication standard
Bluetooth (BLE Advertising)
Radio frequency (min / max)
2402 / 2480 MHz
Radio channels (default)
BLE CH 37 / 38 / 39 (2402 / 2426 / 2480 MHz)
Data rate and modulation
1 Mbit/s GFSK (default setting)
2 Mbit/s GFSK (optional setting via NFC)
Temperature measurement range / accuracy
(1)
-25
°C … +6
5 °C / +- 0.3 K
Humidity measurement range / accuracy
0 … 100 % r.h. / +
- 3 % r.h.
Illumination measurement range / accuracy
0 …
65000 Lux / +-10 %
Acceleration measurement range / resolution
+- 4 g / 0.002 g
Acceleration threshold for immediate report
0.03 g (default, configurable via NFC)
Update rate (excl. random offset)
Every 60 seconds (configurable via NFC)
Device configuration
LRN button and NFC interface
User notification
LED (red)
Device identification
Unique 48 Bit Device ID (factory programmed)
Security
AES128 (CBC mode) with sequence counter
Power supply
Integrated solar cell
Minimum light level for self-supplied operation
200 lux for 6 hours per day
(2)
Operating time in darkness (at 25°C)
4 days (after full charge with default settings)
Backup battery type (optional)
CR1632
Operation time with backup battery
Infrequent bright light (200 lux for 2 hrs per day)
Consistent low light (50 lux for 6 hrs per day)
Total Darkness
Renata CR1632 (137 mAh)
8 years
7 years
5 years
Dimensions (Module)
40 mm x 40 mm x 13 mm
Dimensions (Finished product)
49 mm x 49 mm x 13 mm
Note 1: STM 550B is designed for indoor use only and should only be used in the environmental conditions specified
below
Note 2: Minimum amount of light required for self-supplied operation using the default parameters.
See chapter 2.3.1 for other scenarios
1.4
Environmental conditions
Operating Temperature
-5 °C
…
+45 °C (indoor use in dry rooms only)
Humidity
0% to 90% r.h. (non-condensing)