Got rid of a few kB in the binary image by removing F-macro from numerous 1 or 2 character flash strings.
These very short strings take more space in flash and memory when using the F-macro.
Also appending to a string using a `'a'` character definition takes less resources compared to a one-character string `"a"`.
there were several errors that all resulted in a distance value reading of 0. Added an errorState that is printed to the log and helps troubleshooting.
Max. Distance checking can be turned off by setting max distance to 0 cm. If max. distance is used, exceeding the range will return a distance of 0 cm and print this to the log.
At this moment it is just using the same static configuration as P150 from the playground.
It is not yet using the settings. This will have to be changed later on.
This should also fix #1381.
There is something strange about the handling of micros() timers in `NewPingESP8266`.
For this reason I added also a timeout based on `millis()`.
Adding an existing and proven I2C library.
Will need to test if this is working fine on ESP32 too and try to move I2C functionality to use these functions.
There is a problem with the PlatformIO builder since the last update of @mvdbro
It's an issue with the parsing of `#ifdef ESP32`.
It is very well explained here: [platformio/platformio-core#801 (comment)](https://github.com/platformio/platformio-core/issues/801#issuecomment-252447178)
In short, the event handling functions for the wifi have been moved to a separate .h file, since those files will be parsed properly by the Library Dependency Finder (LDF) in PlatformIO 3.x
Were changed to be able to test the PlatformIO feature to compile only files that are actually used.
Apparently the Arduino IDE cannot find the files anymore because that IDE needs the parent directory to be named as the main project file, not "src"
* [issue #869] Added 'LWT' to last will topic and improved CPU load
See #869 for discussion on Last Will Topic.
Also changed the way it tried to reconnect to make it return a lot faster when connection is not (yet) possible and call the PubSubClient::loop() at a much slower pace to reduce CPU usage. (See #847)
This higher CPU load was probably introduced when fixing #683.
* [MQTT] Fix error reporting success status with longer payloads
Applied PR https://github.com/knolleary/pubsubclient/pull/360/files
* made MQTT_CALLBACK_SIGNATURE for esp32 functional
Applied PR https://github.com/knolleary/pubsubclient/pull/336
* [OLED] Move font to oled lib dir
It is specific for use wth that library.
* [OLED framed] Stop reading from flash constantly and live update WiFi
See #857
The OLED Framed plugin was reading from spiffs all of the time (on every display update)
Now the data is only read from SPIFFS when needed.
Also made the WiFi strength indicator update every second (only when changed) to be able to see changes in WiFi status much easier.
Gijs Noorlander
jimmys01
kpalczewski
Saverio Cisternino
JojoS62
Plebs
Nuno Sousa
Bartlomiej Zimon
mvdbro
Edwin Eefting
Henri de Jong