Chengdu Ebyte Electronic Technology Co.,Ltd.
E49-400M20S4 User Manual
Copyright ©2012–2021
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Chengdu Ebyte Electronic Technology Co.,Ltd.
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5 Basic Circuit Diagram
5.1 Hardware design and circuit schematic diagram
6 FAQ
6.1 Communication range 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 2.5V, the lower the voltage, the lower the
transmitting power;
Due to antenna quality or poor matching between antenna and module.
6.2 Module is easy to damage
Please check the power supply source, ensure it is within the recommended supply voltage, voltage higher than the
Max 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 insalling and using high frequency devices have electrostatic
susceptibility;
