Users Manual

RF1276D27 Long Distance Transceiver module V4.0
- 14 - 2016-6-12
NOThigher than 60 percent of the air rate. For instance, the UART rate is 9600bps, the air rate is
4800bps.If UART rate is the same as the air rate, the only way is to interval the transmitting time. If
terminal transmits 100bytes to UART every time, it will take 104ms every time.
(104ms/0.6)*(9600/4800)=347ms. So if the interval time that terminal transmit 100bytes to UART should
NOT less than 347ms every time, those mentioned problems can be avoided.
3）Errorcontrol
The wireless network module has strong capability of anti-interference because of the high efficiency
checking error correction with interleaving encoding technology. However, when it is in a bad
circumstance that has strong electric interference, the data may be lost or receive some error data.
User can
increase the development of the system link layer protocol. For instance, if user can increase TCP/IP slip
window and repeat transmitting functions, it will improve the reliability and ability of wireless network
communication.
4) Selection of antenna
Antenna is a very important factor of the communication system. The quality of antenna impacts the
capability of communication system. So user should strictly choose the quality of antenna. Generally
speaking, it mainly contains two points: the type of antenna (size) and its electric capability. The antenna
must be matched with the frequency of communication system.