Users Manual

RF1276D27 Long Distance Transceiver module V4.0
- 15 - 2016-6-12
11. Q&A:
Questions and Answers
Can not
communicate
between two
devices
1．The communication protocol is different between two modules, for
instance: data rate and checkout.
2．The frequency or RF data rate is different between two communicated
modules.
3．They are not the same kind products.
4．The connection between module and terminal is wrong.
5、The module is wrong.
6．The setting of EN is wrong.
7．The communication distance exceeds the range, or the connection of
antenna is bad.
Short
communication
distance
1．The supply voltage exceeds range
2．The ripple of power is too big.
3．The connection of antenna is bad or it is a wrong kind of antenna
4．Antenna is too close to the surface of metal or the ground
5．Receiving circumstance is very bad, for instance buildings and strong
interference.
6．There is interference of the same frequency
Receive wrong
data
1．Wrong setting of COM, for example, Baud rate is wrong
2．The connection of UART is wrong.
3．The cable to the UART is too long.