New functions and features£º
1.Add TRIMMARK3 protocol
2.Add GSM network mode
3.Support APIS 3.0 protocol
4.Support auto power on
5.Add NMEA0183 PJK and PJT output
6.Support saving NMEA0183 output configuration into receiver
7.Support controlling Static data collection via Bluetooth 
8.Compatible with 3G GPRS module
9.Support independent mask angle settings of Static and RTK

Improvements:
10.Solve the problem that direct power off during Static collecting will cause data error with unreasonable antenna height.
11.Reduce latency of X91 during stake out
12.Solve the problem of firmware upload sometimes breaking down
13.Solve the problem that mask angle sometimes will auto change to 0 after configuration in HcLoader
14.Solve the problem that in APIS work mode if the rover logges on network first and the base second, the rover could not receive correction message.