Integration Guide

SMK900 Integration Guide Revision 4
mesh networks have to be controlled by its own gateway. The bridging between gateways is handled by
the integrator.
Frequency Hopping implications
The SMK900 uses the FHSS approach in order to ensure that co-located networks using different FHSS
hopping tables (a.k.a channels) can coexist with graceful degradation of network performance as the
number of conflicting networks overlapping increases. This however comes with the price that any node
needs a certain time delay (called "seek time") in order to connect itself to its desired network (this delay
can range between seconds to minutes, depending on the sleep interval between wake cycles for said
network. For instance, at a sleep interval of 1 second, the seek time is of the order of 30 seconds to 1
minute, and this seek time increases linearly with said sleep interval.
Specifications
Absolute maximum ratings
Supply voltage
-0.5 to 6.5V
All input/output pins
-0.5 to 3.3V
Specification
Descriptions
Operating Temperature
-20 to 70 C guaranteed for max up count
-40 to 85 C guaranteed for half up count
Storage Temperature
-40 to 85 C
Power requirement
Supply voltage
3.3 to 5.5V
Transmit Current
130 mA peak
Receive Current
20 mA
Idle
30 uA
Transceiver
Urban / Indoor / NLOS*
100 to 500m
Outdoor / LOS**
10Km+
Transmit Power
Low: 50mW High 100mW
RF Data Rate
50 Kbits
Number Of Channel
5
Frequency band
902 to 928 MHz
Receiver Sensitivity
-110 dBm
Antenna Connector
U.FL
Antenna Gain Maximum
3 dBi
Max Hop Count
31
Encryption OTA
AES 128 bits
Virtual Machine
Memory
16 KBytes
* NLOS: None Line Of Sight
** LOS: Line Of Sight
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