Table 3 Titan service set and execution time 
on a Tmote Sky. RAM indicates the number of dynamic memory bytes allocated, and ROM is the bytes of code memory used. The delay has been computed for a packet of 22 bytes data. 
gives memory bytes needed to store 
in the data type used, for example, for 16 bit values 
.
on a Tmote Sky. RAM indicates the number of dynamic memory bytes allocated, and ROM is the bytes of code memory used. The delay has been computed for a packet of 22 bytes data. 
gives memory bytes needed to store 
in the data type used, for example, for 16 bit values 
.Service | Description | Exec. Time | RAM | ROM |
|---|---|---|---|---|
Duplicator | Copies a packet to multiple output ports |
| — | 250 |
FBandEnergy | Computes the energy in a frequency band from FFT data |
| 12 | 410 |
FFT | Computes a 32 bit real-valued FFT over a data window of | 186 ms |
| 4714 |
Led | Displays incoming data on the mote LED array |
| — | 260 |
Mean | Computes the mean value over a sliding window of size |
|
| 494 |
Merge | Merges multiple packets into one |
| 12 | 454 |
MinMax | Looks for the maximum and minimum in a window of size |
| 8 | 484 |
ExpAvg | Computes an exponential moving average over input data |
| 8 | 416 |
Synchronizer | Synchronizes data by dropping packets until a user-defined event occurs |
| 10 | 476 |
Threshold | Quantizes the data by applying a user-defined number |
|
| 424 |
TransDetect | Detects value changes in the input signal and issues a packet with the new value |
| 2 | 474 |
Variance | Computes the variance over a sliding window of size |
|
| 720 |
Zero crossings | Counts the number of zero crossings in the data stream |
| 8 | 370 |
samples (exec. time for 128 16-bit samples)
of thresholds
