HF-LPB Low Power WiFi Module User Manual
Shanghai High-Flying Electronics Technology Co., Ltd
www.hi-flying.com
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2.6. Multi-TCP Link Connection
When HF-LPB module configured as TCP Server, it supports Multi-TCP link connection, and
maximum eight TCP clients permit to connect to HF-LPB module. User can realize multi-TCP link
connection at each work mode.
Multi-TCP link connection will work as following structure:
Upstream:
All dates from different TCP connection or client will be transmitted to the serial port as a sequence.
Downstream:
All data from serial port (user) will be duplicate and broadcast to every TCP connection or client.
Detailed multi-TCP link data transmition structure as following figure:
Figure 14. Multi-TCP Link Data Transmition Structure
2.7. Power Save Scheme
HF-LPB module can work at three modes based on different power save scheme:
Normal (Active/Sleep) Mode
- AP Associated, WiFi ON/OFF based on internal control
Deep Sleep Mode
- Non AP Associated, WiFi OFF
Standby Mode
- Non AP Associated, WiFi Shut dwon
Normal (Active/Sleep) Mode
Normal mode support two work option: One is no DTIM related (Default
mode), module will monitor the interval to Active/Sleep. The other is DTIM related mode, whcih allows
the module to sync up with beacons sent from the AP which contains the DTIM (Delivery Traffic
Indication Message). The DTIM indicates when broadcast and multicast data will be sent on the
network. This property is configured on the AP (Default value is 1, which means DTIM= 100ms) and is
typically configured as the number of beacons between each beacon with DTIM.
Deep Sleep/Standby Mode
allows the WiFi circuitry to be “OFF” status or powered down, which
results in the lower/lowest sleep current, but at the expense of longer wake up times. This is due to