Applicable for SDK version 5.9.0 and higher
Normal - heartbeats are sent every 20 minutes but when system suspends SDK, it gees to a sleep mode and will restore work only in trip start time.
Mode switcher - (void)setAggressiveHeartbeats:(BOOL)value; usage example:
[[RPEntry instance] setAggressiveHeartbeats: false];
Check state - (BOOL)aggressiveHeartbeat; usage example:
[[RPEntry instance] aggressiveHeartbeat];