#252 ESP32 Ultra Low Power (ULP) core made easy in the Arduino IDE including 100$ challenge

We can save energy by deep-sleeping the ESP32. During this time, the chips do not consume a lot of energy but also are not responsive. This is why Espressif included a mysterious Ultra Low Power core (ULP) which is active when the main processor sleeps. People say it has to be programmed in Assembler, and nearly nobody was able to program it in the Arduino environment. Until now.

Links: Arduino IDE ULP repository: https://github.com/duff2013/ulptool Sketch: https://github.com/SensorsIot/ESP32-ULP-Arduino-IDE ESP32 module: http://s.click.aliexpress.com/e/bQwDCLQs ESP32 Board: http://s.click.aliexpress.com/e/XAhzEgY ULP commands: https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/ulp_instruction_set.html Technical Reference: https://www.espressif.com/sites/default/files/documentation/esp32_technical_reference_manual_en.pdf Otii power Supply: https://www.qoitech.com

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