esptool.py call is correct for a 4MB board.
please post the result of this call
python esptool.py --port /dev/tty.SLAB_USBtoUART --baud 115200 flash_id
@MaBe started
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.
esptool.py call is correct for a 4MB board.
please post the result of this call