Basic Application; Basic Circuit; Faq; Communication Range Is Too Short - Ebyte E220-900MM22S Manual

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5 Basic Application

5.1 Basic Circuit

Note: The L1 inductor is a protective device used to prevent the device from being damaged due to excessive input
power of the antenna. The user should add this inductor when using the module.

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;
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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;
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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);
At room temperature, the low voltage of the power supply is lower than the recommended value. The lower the

voltage, the lower the output power.;
Due to antenna quality or poor matching between antenna and module.
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E220-900MM22S User Manual