cottongin/immich-frame
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

fix: skip NTP sync and mDNS in deep sleep wake path to reduce battery drain

Browse Source 
The syncNTP() call blocks up to 5 seconds waiting for NTP response on
every deep sleep wake cycle (every 10 minutes). Combined with mDNS
startup, this added significant active WiFi time per cycle.

Fix: Add 'minimal' flag to WiFiManager::begin()/startStation(). In
the deep sleep wake path, skip NTP sync and mDNS entirely. The system
clock is already seeded from the hardware RTC at boot, which is
accurate enough for 30-day date window calculations.

Normal interactive boot still does full NTP sync + mDNS as before.

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
cottongin
2026-08-05 20:28:00 -04:00
parent b9e5044fd2
commit ac6c6eaf79
3 changed files with 16 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
src/wifi_manager.cpp
View File

@@ -6,7 +6,7 @@
#include <sys/time.h>
#include "config.h"
void WiFiManager::begin(SettingsManager& settings) {
void WiFiManager::begin(SettingsManager& settings, bool minimal) {
_settings = &settings;
if (!_settings->isProvisioned()) {
@@ -15,7 +15,7 @@ void WiFiManager::begin(SettingsManager& settings) {
return;
}
startStation();
startStation(minimal);
}
bool WiFiManager::isConnected() {
@@ -47,18 +47,26 @@ void WiFiManager::startAP() {
WiFi.softAPIP().toString().c_str());
}
void WiFiManager::startStation() {
void WiFiManager::startStation(bool minimal) {
Settings s = _settings->get();
WiFi.disconnect(true);
WiFi.mode(WIFI_STA);
_apMode = false;
Serial.printf("[wifi] Connecting to: %s\n", s.wifi_ssid.c_str());
Serial.printf("[wifi] Connecting to: %s%s\n", s.wifi_ssid.c_str(),
minimal ? " (minimal)" : "");
for (_retryCount = 0; _retryCount < WIFI_MAX_RETRIES; _retryCount++) {
if (attemptConnection(s.wifi_ssid, s.wifi_pass)) {
Serial.printf("[wifi] Connected! IP: %s, RSSI: %d\n",
WiFi.localIP().toString().c_str(), WiFi.RSSI());
if (minimal) {
// Deep sleep wake path: skip NTP/mDNS to minimize active time.
// System clock was already seeded from hardware RTC at boot.
return;
}
WiFi.setSleep(WIFI_PS_MIN_MODEM);
syncNTP();
setupMDNS("papercolor");