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[SX126x] Changed default minSymbols value to 8

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jgromes 2019-12-05 15:22:51 +01:00
parent 7631353b4a
commit df7e517ca5
1 changed files with 3 additions and 5 deletions
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8
src/modules/SX126x/SX126x.h
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@ -517,14 +517,12 @@ class SX126x: public PhysicalLayer {
\param senderPreambleLength Expected preamble length of the messages to receive. \param senderPreambleLength Expected preamble length of the messages to receive.
If set to zero, the currently configured preamble length will be used. Defaults to zero. If set to zero, the currently configured preamble length will be used. Defaults to zero.
\param minSymbols Parameters will be chosen to ensure that the unit will catch at least this many symbols of any preamble of the specified length. Defaults to 3. \param minSymbols Parameters will be chosen to ensure that the unit will catch at least this many symbols of any preamble of the specified length. Defaults to 8.
Note that Semtech in the CAD application note state that 2 symbols are fine for CAD, According to Semtech, receiver requires 8 symbols to reliably latch a preamble. This makes this method redundant when transmitter preamble length is less than 17 (2*minSymbols + 1).
but in the RX duty cycle note specify that sleep duration should be 8 symbols less than preamble length (corresponding to minSymbols = 4).
Testing suggests that a value of 3 for minSymbols works at high SNR.
\returns \ref status_codes \returns \ref status_codes
*/ */
int16_t startReceiveDutyCycleAuto(uint16_t senderPreambleLength = 0, uint16_t minSymbols = 3); int16_t startReceiveDutyCycleAuto(uint16_t senderPreambleLength = 0, uint16_t minSymbols = 8);
/*! /*!
\brief Reads data received after calling startReceive method. \brief Reads data received after calling startReceive method.