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Thi may happen if read() gets called repeatedly (such as in HttpClient to parse response headers) and the connection is closed unexpectedly or the remote peer may have unexpected behavior that causes the underlying socket to report an error. In that case read() itself calls stop(), which invalidates the receive buffer object. Then when read() is called again without checking, such as inside readStringUntil(), the _rxBuffer is null and ESP32 crashes.
Arduino core for the ESP32
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Contents
- ESP32-S2 and ESP32-C3 Support
- Development Status
- Installation Instructions
- Decoding Exceptions
- Issue/Bug report template
- ESP32Dev Board PINMAP
ESP32-S2 and ESP32-C3 Support
If you want to test ESP32-S2 and/or ESP32-C3 through the board manager, please use the development release link: https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_dev_index.json and install the latest 2.0.0 version.
Development Status
Latest Stable Release 
Latest Development Release 
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 are sure no one else had the issue, follow the ISSUE_TEMPLATE while reporting any issue.
ESP32Dev Board PINMAP
Tip
Sometimes to program ESP32 via serial you must keep GPIO0 LOW during the programming process