Ebyte E104-BT20, User Manual

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Chengdu Ebyte Electronic Technology Co., Ltd. E104-BT20 User Manual
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Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.
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part of the module and routed in the Bottom Layer;
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If the module is soldered or placed in the Top Layer, it is wrong to randomly route on the Bottom Layer or other layers,
which will affect the spurs and receiving sensitivity of the module to varying degrees;
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If there is a device with large electromagnetic interference around the module, it will greatly affect the performance of the
module. It is recommended to maintain the distance from the module according to the strength of the interference. If
circumstances permit, it is recommended to do proper isolation and shielding;

If there are wirings with large electromagnetic interference around the module (such as high frequency digital, high
frequency analog, power line), the performance of the module will be greatly affected. It is recommended to do proper isolation
and shielding;

If the communication line uses 5V level, it must be connected in series with a 1k-5.1k resistor (not recommended, there is
still risk of damage);

Try to keep away from some physical layers that also use the 2.4GHz TTL protocol, such as: USB3.0 as much as possible
to avoid electromagnetic interference to other devices;

The antenna installation has a great influence on the performance of the module. Make sure that the antenna is exposed and
preferably vertical. When the module is installed inside the casing, it is recommended to use a good antenna extension cable to
extend the antenna to the outside of the casing;

The antenna must not be installed inside the metal case, which will greatly reduce the transmission distance.
9. FAQ
9.1 Communication range is too short
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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 higher the air data rate, the shorter the
distance).
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The power supply low voltage under room temperature is lower than recommend ones, the lower the voltage, the
lower the transmitting power.

Due to antenna quality or poor matching between antenna and module.
9.2 Module is easy to damage
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Please check the power supply source, ensure it is 2.0V~3.6V, voltage higher than 3.6V will damage the module.
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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 electrostatic
susceptibility.
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Please ensure the humidity is within limited range, some parts are sensitive to humidity.
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Please avoid using modules under too high or too low temperature.