Faq; Communication Range Is Too Short; Module Is Easy To Damage - Ebyte E79-900DM2005S User Manual

Chengdu Ebyte Electronic Technology Co.,Ltd
};
Note:
The chip used inside the module is DC/DC mode.

The Sub-1G band module comes with our own RF switch. Please follow the truth table strictly.
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Truth Table
Burning program: The module is a SOC module with its own GPIO port. Download the program using the XDS100

downloader.
Program download interface definition:
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6. FAQ

6.1 Communication range is too short

The communication distance will be affected when obstacle exists.
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Data lose rate will be affected by temperature, humidity and co-channel interference.
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The ground will absorb and reflect wireless radio wave, so the performance will be poor when testing near ground.
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Sea water has great ability in absorbing wireless radio wave, so performance will be poor when testing near the sea.
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The signal will be affected when the antenna is near metal object or put in a metal case.
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Power register was set incorrectly, air data rate is set as too high (the higher the air data rate, the shorter the
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distance).
The power supply low voltage under room temperature is lower than 2.5V, the lower the voltage, the lower the
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transmitting power.
Due to antenna quality or poor matching between antenna and module.
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6.2 Module is easy to damage

Please check the power supply source, ensure it is 2.0V~3.6V, voltage higher than 3.6V will damage the module.
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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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DIO_6 DIO_5
Low High
High Low
Transmit(TX) Receive(RX)
ON OFF
OFF ON
E79 Pins XDS100 Interfaces
JATG_TMSC
JTAG_TCKC
RESET_N SRSTN
GND DGND
VCC
E79-900DM2005S User Manual
TMS
TCK
TVD
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