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Earle F. Philhower, III ab309e40d5 Copy ESP8266 String w/SSO to ESP32 repo (#2715)
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.
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Arduino core for ESP32 WiFi chip Build Status

Need help or have a question? Join the chat at https://gitter.im/espressif/arduino-esp32

Contents

Development Status

Latest stable release Release Version Release Date Downloads

Latest development release Development Version Development Date Downloads

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

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

Pin Functions

Hint

Sometimes to program ESP32 via serial you must keep GPIO0 LOW during the programming process