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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.
@daw
Using a logic probe, I have verified that I see activity on RX/TX of the ESP when I am running a "normal" WiFi application but no apparent activity on those pins when trying to communicate with the ESP via the STM32 with the ESP in bootloader mode.