Ebyte E72-2G4M05S1G, User Manual

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Chengdu Ebyte Electronic Technology Co.,Ltd. E72-2G4M05S1G User Manual
Copyright ©2012–2021
，成都亿佰特电子科技有限公司
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4.3 Connection instructions to the emulator

TMS, TCK, reset, and ground need to be connected between the emulator and the module, and an additional 3.3V
power supply is required for the emulator;

Use USB to UART module to connect with module, module serial port and IO port are multiplexed, users can set
according to their own needs;

Please note that good grounding is required. When there is a large area of grounding, the power supply ripple is
small. Increase the filter capacitor and try to be close to the VCC and GND pins of the module.
5 FAQ
5.1 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 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);

The power supply low voltage under room temperature is lower than 2.5V, the lower the voltage, the lower the
transmitting power;

Due to antenna quality or poor matching between antenna and module.