Faq; Communication Range Is Too Short; Module Is Easy To Damage; Bit Error Rate Is Too High - Ebyte E28-2G4M27S User Manual

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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.
⚫ Seawater 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).
⚫
When the power supply at room temperature is lower than the recommended low voltage, the lower the voltage is,
the lower the transmitting power is.
⚫ Due to antenna quality or poor matching between antenna and module.

6.2 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.
⚫
Please check the stability of power supply and ensure the voltage not to fluctuate too much.
⚫ Please make sure anti-static measures are taken when installing and using, high frequency devices have electrostatic
susceptibility.
⚫ Please ensure the humidity is within limited range for some parts are sensitive to humidity.
⚫ Please avoid using modules under too high or too low temperature.

6.3 Bit error rate is too high

⚫ When there are co-channel signal interference nearby, be away from interference sources or modify frequency and
channel to avoid interference;
⚫ The clock waveform on the SPI is not standard. Check whether there is interference on the SPI line. The SPI bus
should not be too long.
⚫ Unfavorable power supply may cause messy code. Make sure that the power supply is reliable.
⚫ Extension line and feeder with poor quality or too long ones will cause high bit error rate.
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E28-2G4M27S User Manual
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