9db207afbe
If the esp32 is reset during a i2c read cycle the slave device may be in control of the SDA line. If the SDA line is held low, the esp32 cannot issue a START or STOP to recover the bus. The previous code did not correctly configure the SCL output pin, and it cycled SCL 9 times with SDA Low. Since the slave device was in a READ cycle, it just continued outputting the bits of the current byte. When the ACK/NAK bit space occurred, The low output value of SDA was interpreted as ACK so the slave device continued with the next byte. It never terminated the READ cycle. This new code will correctly recover from an interrupted READ
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