Ebyte E220-900MM22S, Руководство пользователя, Страница: 10 / 14

Chengdu Ebyte Electronic Technology Co., Ltd. E220-900MM22S User Manual
Copyright ©2012–2019
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Chengdu Ebyte Electronic Technology Co., Ltd.
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
maximum value will cause permanent damage to the module;

Please check the stability of power source, the voltage cannot fluctuate too much;

Please make sure antistatic measure are taken when installing and using, high frequency devices have electrostatic
susceptibility;

Please ensure the humidity is within limited range, some parts are sensitive to humidity;

Please avoid using modules under too high or too low temperature.
6.3 BER(Bit Error Rate) Is High

There are co-channel signal interference nearby, please 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, and the SPI bus
routing should not be too long;

Poor power supply may cause messy code. Make sure that the power supply is reliable;

The extension line and feeder quality are poor or too long, so the bit error rate is high.