Ebyte E07-900M10S - Frequently Asked Questions (FAQ); Communication Range Issues; Module Damage Prevention; High Bit Error Rate (BER) Causes

Chengdu Ebyte Electronic Technology Co.,Ltd E07-900M10S User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
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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;
 Sea water has great ability in absorbing wireless radio wave, so performance will be poor when testing near the sea;
 The signal will be seriously affected when the antenna is near metal object or put in a metal case;
 Power register was set incorrectly or air data rate is set as too high (the higher the air data rate, the shorter the
distance);
 The power supply low voltage under room temperature is lower than our recommendation, the lower the voltage,
the lower the transmitting power;
 Due to antenna quality or poor matching between antenna and module.
6.2 Module is easy to damage
 Please check the power supply source, ensure it is 1.8V~3.6V, voltage higher than 3.6V will damage the module;
 Please check the stability of power source, the voltage cannot fluctuate too much;
 Please make sure anti-static operation 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 SPI is not standard, check whether there is interference on the SPI line, and the SPI bus line
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.
7 Production guidance
This product is a SMD module. When soldering the module, the soldering personnel must work in accordance with
the anti-static operation specification;
This product is an electrostatic sensitive product. If the module is not welded according to the specification, the
module may be permanently damaged.