Programming - Ebyte E32-400M20S User Manual

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antenna extension cable to extend the antenna to the outside;
The antenna must not be installed inside the metal case, which will cause the transmission distance to be greatly
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weakened.

4.2 Programming

The core of this module is SX1278/SX1278, its driving method is completely equivalent to SX1278/SX1276, the
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user can operate according to the SX1278/SX1276 chip manual
DIO0, DIO1, DIO2, DIO3, DIO4 and DIO5 are general I/O ports, which can be configured into a variety of
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functions. See SX1278 manual for details. If not used can be suspended;
NRST, TXEN and RXEN pins must be connected, wherein NRST controls the reset of the chip, TXEN and RXEN
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pins control the RF switch;
Pay attention to good grounding, large area of ground, small ripple of power supply, filter capacitor should be
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added and close to module VCC and GND pins as far as possible;
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
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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;
The register configuration can be reinitialized when the chip is idle for greater stability.
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E32-400M20S User Manual
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