ESP8266 Community Forum

In my project I use GPIO12, 13, 14 and 16 to control stepper motor. When ESP8266 bootloader enters UART flashing mode (tie GPIO0 down at start), then stepper motor gets hot due to GPIOs in low state. How can I change initial states of particular GPIOs in UART flashing mode of bootloader? Thanks in advance.

Impossible. You may need to use an analogue switch or AND port between stepper and GPIO's.