Motes transmission power/range changes. We can control the coverage area of nodes in cooja network simulator.
Step 1: File at location:
contiki/core/dev/cc2420.h declared transmission range.By modifying this we can change ranges.
// parameter power Between 1 and 31
void cc2420_set_txpower(uint8_t power);
#define CC2420_TXPOWER_MAX 31
#define CC2420_TXPOWER_MIN 0
Step 2: Another way to modify
A file with (.csc) extension cooja file will be created after compilation in cooja.
Open a file and change the transmission range.
Step 3:right click on node >> change transmission ranges .