Module Is Easy To Damage; Ber(Bit Error Rate) Is High - Ebyte E220-900MM22S Manual

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6.2 Module Is Easy To Damage

Please check the power supply to ensure that it is between the recommended supply voltages, as exceeding the
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maximum value will cause permanent damage to the module;
Please check the stability of power source, the voltage cannot fluctuate too much;
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Please make sure antistatic measure are taken when installing and using, high frequency devices have electrostatic
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susceptibility;
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.
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6.3 BER(Bit Error Rate) Is High

There are co-channel signal interference nearby, please be away from interference sources or modify
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frequency and channel to avoid interference;
The clock waveform on the SPI is not standard, check whether there is interference on the SPI line, and the SPI bus
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routing should not be too long;
Poor power supply may cause messy code. Make sure that the power supply is reliable;
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The extension line and feeder quality are poor or too long, so the bit error rate is high.
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E220-900MM22S User Manual