SSD1306 prefs start-up optimisation

Avoid [ 137][E][Preferences.cpp:483] getString(): nvs_get_str len fail: SSD1306Config NOT_FOUND error during start-up when no save preferences have been found
1technophile · Mar 27, 2023 · fb1d60c · fb1d60c
1 parent 0ece563
commit fb1d60c
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/main/ZdisplaySSD1306.ino b/main/ZdisplaySSD1306.ino
@@ -238,8 +238,8 @@ void SSD1306Config_init() {
 bool SSD1306Config_load() {
  StaticJsonDocument<JSON_MSG_BUFFER> jsonBuffer;
  preferences.begin(Gateway_Short_Name, true);
- String exists = preferences.getString("SSD1306Config", "{}");
- if (exists != "{}") {
+ bool exists = preferences.isKey("SSD1306Config");
+ if (exists) {
  auto error = deserializeJson(jsonBuffer, preferences.getString("SSD1306Config", "{}"));
  preferences.end();
  if (error) {
@@ -258,6 +258,8 @@ bool SSD1306Config_load() {
  displayMetric = jo["displaymetric"].as<bool>();
  idlelogo = jo["idlelogo"].as<bool>();
  displayFlip = jo["display-flip"].as<bool>();
+ preferences.end();
+ Log.notice(F("Saved SSD1306 config loaded" CR));
  return true;
  } else {
  preferences.end();