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lorawan.cpp: TTN SF9 RX2 patch

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This commit is contained in:
Verkehrsrot 2019-10-06 13:13:57 +02:00
parent 7762170fa1
commit bdd401c42b
1 changed files with 10 additions and 9 deletions
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19
src/lorawan.cpp
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@ -485,13 +485,19 @@ void lmictask(void *pvParameters) {
os_init(); // initialize lmic run-time environment os_init(); // initialize lmic run-time environment
LMIC_reset(); // initialize lmic MAC LMIC_reset(); // initialize lmic MAC
// Note that The Things Network uses the non-standard SF9BW125 data rate for RX2
// in Europe and switches between RX1 and RX2 based on network congestion. Thus,
// to avoid occasionally join failures, we set datarate to SF9 and bypass the
// LORAWAN spec-compliant RX2 == SF12 setting
#if defined(CFG_eu868) #if defined(CFG_eu868)
// Note that The Things Network uses the non-standard SF9BW125 data rate for
// RX2 in Europe and switches between RX1 and RX2 based on network congestion.
// Thus, to avoid occasionally join failures, we set datarate to SF9 and
// bypass the LORAWAN spec-compliant RX2 == SF12 setting
LMIC_setDrTxpow(EU868_DR_SF9, KEEP_TXPOW); LMIC_setDrTxpow(EU868_DR_SF9, KEEP_TXPOW);
#else
// Set the data rate to Spreading Factor 7. This is the fastest supported
// rate for 125 kHz channels, and it minimizes air time and battery power.
// Set the transmission power to 14 dBi (25 mW).
LMIC_setDrTxpow(DR_SF7, 14);
#endif #endif
LMIC_setLinkCheckMode(0); LMIC_setLinkCheckMode(0);
// This tells LMIC to make the receive windows bigger, in case your clock is // This tells LMIC to make the receive windows bigger, in case your clock is
@ -511,11 +517,6 @@ void lmictask(void *pvParameters) {
LMIC_selectSubBand(1); LMIC_selectSubBand(1);
#endif #endif
// Set the data rate to Spreading Factor 7. This is the fastest supported
// rate for 125 kHz channels, and it minimizes air time and battery power.
// Set the transmission power to 14 dBi (25 mW).
LMIC_setDrTxpow(DR_SF7, 14);
// register a callback for downlink messages. We aren't trying to write // register a callback for downlink messages. We aren't trying to write
// reentrant code, so pUserData is NULL. // reentrant code, so pUserData is NULL.
LMIC_registerRxMessageCb(myRxCallback, NULL); LMIC_registerRxMessageCb(myRxCallback, NULL);