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5 The slave sends the data “11 22 33 44 55 66 77 88 99” (hex) to the master, and the data received by the master
is “11 22 33 44 55 66 77 88 99” (HEX), as long as the format transmission is turned on. The first byte is
sending IDX. Both the host and the slave can use different transmission modes but the input needs to meet the
transmission rules.
8 FAQ
8.1 Communication distance is too short
The communication distance will be affected when obstacle exists;
Data lose rate will be affected by temperature, humidity and co-channel interference;
The ground will absorb and reflect wireless radio wave, so the performance will be poor when testing
near ground;
Sea water has great ability in absorbing wireless radio wave, so performance will be poor when
testing near the sea;
The signal will be affected when the antenna is near metal object or put in a metal case;
Power register was set incorrectly, air data rate is set as too high (the higher the air data rate, the
shorter the distance);
The power supply low voltage under room temperature is lower than recommended value, the lower
the voltage, the lower the transmitting power
；
Due to antenna quality or poor matching between antenna and module.
8.2 Module is easy to damage
Please check the power supply source, ensure it is between the recommended supply voltage, voltage
higher than the maximum will damage the module.
Please check the stability of power source, the voltage cannot fluctuate too much;
Please make sure antistatic measure are taken when installing and using, high frequency devices have
