ESP8266 Community Forum

- Sun Jun 12, 2016 9:55 am #49063 Hey guys,

I'm new to the esp8266 world and haven't got any idea how to fix following problem:

I've got an esp-01 board and connected it with my computer by an usual usb to ttl module.

First, I tried to flash an Arduino sketch to the board in flash mode - the blue light on the board flashed an it seemed to work.

But when I removed GND from GPIO0 and plugged the cable out and in again, the sketch didn't start.

So I tried to flash the AT firmware again by esptool - doesn't work either.

What do I wrong?

- Sun Jun 12, 2016 2:46 pm #49080 Hi, have you got 10k pullups on GPIO'S 0 & 2?

- Mon Jun 13, 2016 12:02 pm #49128 No, I haven't. But there isn't anything connected to GPIO2 and GPIO0 is connected to GND.