Faq; Communication Range Is Too Short; Module Is Easy To Damage; High Bit Error Rate - Ebyte E22-900M22S User Manual

Chengdu Ebyte Electronic Technology Co., Ltd.

5. FAQ

5.1 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 higher the air data rate, the shorter the
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distance).
When the power supply at room temperature is lower than the recommended low voltage, the lower the voltage is,
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the lower the transmitting power is.
Due to antenna quality or poor matching between antenna and module.
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5.2 Module is easy to damage

Please check the power supply and ensure it is within the recommended range. Voltage higher than the peak will
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lead to a permanent damage to the module.
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
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susceptibility.
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.
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5.3 High bit error rate

There are co-channel signal interference nearby, keep away from interference sources or modify frequency, channel
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to avoid interference.
The clock waveform on the SPI is not standard. Check whether there is interference on the SPI line. The SPI bus
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line should not be too long.
Unsatisfactory power supply may also cause garbled characters, and ensure the reliability of the power supply.
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If the extension cable or feeder is of poor quality or too long, the bit error rate will be high.
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E22-900M22S User manual
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