Ebyte E32 Series, Руководство пользователя

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Chengdu Ebyte Electronic Technology Co.,Ltd. E32-900M30SA User Manual
Copyright ©2012–2021
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Chengdu Ebyte Electronic Technology Co.,Ltd. 8
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Assume that there are traces with large electromagnetic interference (high-frequency digital, high-frequency analog,
power traces) around the module that will greatly affect the performance of the module. It is recommended to stay
away from the module according to the strength of the interference.If necessary, appropriate isolation and shielding
can be done;
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Try to stay away from some physical layers such as TTL protocol at 2.4GHz , for example: USB3.0;
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The mounting structure of antenna has a great influence on the performance of the module. It is necessary to ensure
that the antenna is exposed, preferably vertically upward. When the module is mounted inside the case, use a good
antenna extension cable to extend the antenna to the outside;
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The antenna must not be installed inside the metal case, which will cause the transmission distance to be greatly
weakened.
4.2 Programming
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The core of this module is SX1278/PA+LNA, its driving method is completely equivalent to
SX1278/SX1276, the user can operate according to the SX1278/SX1276 chip manual
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DIO0, DIO1, DIO2, DIO3, DIO4 and DIO5 are general I/O ports, which can be configured into a variety of
functions. See SX1278 manual for details. If not used can be suspended;
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NRST, TXEN and RXEN pins must be connected, wherein NRST controls the reset of the chip, TXEN and RXEN
pins control the RF switch;
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Pay attention to good grounding, large area of ground, small ripple of power supply, filter capacitor should be
added and close to module VCC and GND pins as far as possible;
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SPI communication rate should not be set too high, usually 1Mbps is recommended;
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When transmitting, set DIO_7 pin to high level and DIO_13, DIO_14 pins to low level;When receiving, set
DIO_7 pin to low level and DIO_13, DIO_14 pins to high level;Before turning off, set DIO_7, DIO_13,
DIO_14 pins to low;
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The register configuration can be reinitialized when the chip is idle for greater stability.