Chengdu Ebyte Electronic Technology Co.,Ltd.
E104-BT02 User Manual
Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co.,Ltd.
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around the module that will greatly affect the performance of the module. It is recommended to stay away from the module
according to the strength of the interference. If necessary, appropriate isolation and shielding can be done;
If the communication line uses a 5V level, a 1k-5.1k resistor must be connected in series (not recommended, there is still a risk
of damage);
Try to stay away from some physical layers such as TTL protocol at 2.4GHz , for example: USB3.0;
The mounting structure of antenna has a great influence on the performance of the module. It is necessary to ensure that the
antenna is exposed, preferably vertically upward. When the module is mounted inside the case, use a good antenna extension
cable to extend the antenna to the outside.
The antenna must not be installed inside the metal shell, which will greatly reduce the transmission distance.
10 FAQ
10.1 Communication range is too short
The communication distance will be affected when obstacle exists
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Data lose rate will be affected by temperature, humidity and co-channel interference
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The ground will absorb and reflect wireless radio wave, so the performance will be poor when testing near ground
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Sea water has great ability in absorbing wireless radio wave, so performance will be poor when testing near the sea
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The signal will be affected when the antenna is near metal object or put in a metal case
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Power register was set incorrectly, air data rate is set as too high;
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.
10.2 Module is easy to damage
Please check the power supply and ensure it is within the recommended range. Voltage higher than the peak will lead to a
permanent damage to the module
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Please check the stability of power supply and ensure the voltage not to fluctuate too much
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Please make sure anti-static measures are taken when installing and using, high frequency devices have electrostatic
susceptibility
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Please ensure the humidity is within limited range for some parts are sensitive to humidity
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Please avoid using modules under too high or too low temperature.
10.3 BER(Bit Error Rate) is high
Here are co-channel signal interference nearby, please be away from interference sources or modify frequency and channel to
avoid interference;
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