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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@AkosLukacs
Software I2C & SHT21 fails the same way on Espruino Wifi board as well.
Other sensors on the same board (BMP085 and ISL29023) work with software&hardware I2C on Espruino Wifi and ESP32 without any problem with the same code.