Use this forum to chat about hardware specific topics for the ESP8266 (peripherals, memory, clocks, JTAG, programming)

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By uiguig
#76016 Hello :)
I'm programming an ESP-12E module using the Arduino support package. My setup requires a logic level inverter on the Tx pin (only). I built the following which is working OK :
Image
However the ESP8266 will not boot with that attached to it, I need to unplug it at boot time and plug it back in after. Then everything works fine.

Why is this causing the ESP to not boot ? And how can I make it boot anyway?

Thanks !