ab309e40d5
I redid the ESP8266 WString library to enable small string optimization (SSO) a while back, and think it would be helpful even on the ESP32 with its higher memory complement. SSO avoids lots of tiny mallocs() on the heap which cause fragmentation by using the memory in the class object itself to store the actual string and only mallocing() for buffers that are larger than what can fit in thie class object. Modern C++ std::string implementations have this optimization as well, but since we're using Arduino strings we had to roll our own.
Arduino core for ESP32 WiFi chip 
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Contents
- Development Status
- Installation Instructions
- Decoding Exceptions
- Issue/Bug report template
- ESP32Dev Board PINMAP
Development Status
Most of the framework is implemented. Most noticable is the missing analogWrite. While analogWrite is on it's way, there are a few other options that you can use:
- 16 channels LEDC which is PWM
- 8 channels SigmaDelta which uses SigmaDelta modulation
- 2 channels DAC which gives real analog output
Installation Instructions
- Using Arduino IDE Boards Manager (preferred)
- Using Arduino IDE with the development repository
- Using PlatformIO
- Building with make
- Using as ESP-IDF component
- Using OTAWebUpdater
Decoding exceptions
You can use EspExceptionDecoder to get meaningful call trace.
Issue/Bug report template
Before reporting an issue, make sure you've searched for similar one that was already created. Also make sure to go through all the issues labelled as for reference.
Finally, if you're sure no one else had the issue, follow the ISSUE_TEMPLATE while reporting any issue.
ESP32Dev Board PINMAP
Hint
Sometimes to program ESP32 via serial you must keep GPIO0 LOW during the programming process