DigitalInfinity/ESP32-PaxCounter
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fixed error in Lorawan network timesync

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This commit is contained in:
Klaus K Wilting 2020-03-17 20:45:17 +01:00
parent 4d5417cd6f
commit 8dde6bb13b
2 changed files with 12 additions and 13 deletions
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4
platformio.ini
View File

@ -45,7 +45,7 @@ description = Paxcounter is a device for metering passenger flows in realtime. I
[common]
; for release_version use max. 10 chars total, use any decimal format like "a.b.c"
release_version = 1.9.971
release_version = 1.9.972
; DEBUG LEVEL: For production run set to 0, otherwise device will leak RAM while running!
; 0=None, 1=Error, 2=Warn, 3=Info, 4=Debug, 5=Verbose
debug_level = 3
@ -65,7 +65,7 @@ lib_deps_display =
lib_deps_matrix_display =
Ultrathin_LED_Matrix@>=1.0.0
lib_deps_rgbled =
SmartLeds@>=1.1.6
SmartLeds@>=1.2.0
lib_deps_gps =
1655@>=1.0.2 ; #1655 TinyGPSPlus by Mikal Hart
lib_deps_sensors =

21
src/timesync.cpp
View File

@ -226,20 +226,15 @@ void IRAM_ATTR timesync_serverAnswer(void *pUserData, int flag) {
// pUserData: contains pointer to SeqNo (not needed here)
// flag: indicates if we got a recent time from the network
uint32_t delay_msec;
lmic_time_reference_t lmicTime;
if (flag != 1) {
ESP_LOGW(TAG, "[%0.3f] Network did not answer time request",
millis() / 1000.0);
goto Exit;
}
// A struct that will be populated by LMIC_getNetworkTimeReference.
// It contains the following fields:
// - tLocal: the value returned by os_GetTime() when the time
// request was sent to the gateway, and
// - tNetwork: the seconds between the GPS epoch and the time
// the gateway received the time request
lmic_time_reference_t lmicTime;
// Populate lmic_time_reference
if ((LMIC_getNetworkTimeReference(&lmicTime)) != 1) {
ESP_LOGW(TAG, "[%0.3f] Network time request failed", millis() / 1000.0);
@ -247,10 +242,14 @@ void IRAM_ATTR timesync_serverAnswer(void *pUserData, int flag) {
}
// Calculate UTCTime, considering the difference between GPS and UTC time
// epoch, and the leap seconds
timestamp_sec = lmicTime.tNetwork + GPS_UTC_DIFF;
// Add delay between the instant the time was received on the gateway and the
// current time on the node
timestamp_msec = rxTime - lmicTime.tLocal;
// Add the delay between the instant the time was transmitted and
// the current time
delay_msec = osticks2ms(os_getTime() - lmicTime.tLocal);
timestamp_sec += delay_msec / 1000;
timestamp_msec += delay_msec % 1000;
goto Finish;