Topic summary
The discussion centers on configuring OpenBeken firmware for ESP32 devices with a default 4MB flash size using sdkconfig.defaults.esp32. Initial issues included missing sdkconfig.defaults.esp32 and bootloader offset misconfiguration, which were resolved to enable successful compilation and flashing. Various ESP32 variants were tested, including ESP32-C3, ESP32-C6, ESP32-CAM, ESP32-C2, ESP32-D0WDQ5-V3 (ESP-WROOM-32), and ESP32-S3, with reports on flash size detection, bootloader behavior, and peripheral support. Challenges encountered involved stack overflows on reboot, watchdog timer resets, and GPIO functionality inconsistencies, particularly on non-C/S ESP32 boards. Solutions included adjusting makefiles for 4MB flash, fixing bootloader offsets, increasing task stack sizes, and replacing software timers with hardware timers for improved timing accuracy. Peripheral drivers such as BMP280, AHT2x, DS1820, DHT11/22, PWM, UART, and NTP were tested with varying success; some required specific pin assignments or additional delays to prevent crashes. Deep sleep support was added without GPIO wakeup. The firmware uses the Espressif ESP-IDF SDK for ESP32 and plans for ESP8266 porting were discussed, noting SDK differences and RAM constraints. Continuous integration (CI) and online build availability were confirmed. Users shared flashing tools, partition table considerations, and debugging tips including esptool flash_id and efuse burning. The community actively tested and reported logs, crashes, and feature functionality, contributing to iterative fixes and enhancements.
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