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GitHub - mpflaga/Arduino-MemoryFree: basic functions and example to use show used RAM and use less of it.
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Official freeRam() command · Issue #73 · arduino/ArduinoCore-API · GitHub
Air32f103cbt6 Air32f103 Development Board Main Frequency Highest 216m,32k Ram+128k Flash Compatible For Stm32 For Arduino - Integrated Circuits - AliExpress