ESP8266 Community Forum

- Fri Sep 14, 2018 4:41 pm #78236 G'day
I've just bought an ESP-12F board and I started testing it. I connected 3.3V power, GPIO15 to ground, EN(CH_PD) to VCC and RX, TX to USB-UART. It sends

Code: Select all23:30:20.712 ->  ets Jan  8 2013,rst cause:2, boot mode:(3,6)
23:30:20.746 ->
23:30:20.746 -> load 0x40100000, len 27728, room 16
23:30:20.746 -> tail 0
23:30:20.746 -> chksum 0x2a
23:30:20.746 -> load 0x3ffe8000, len 2124, room 8
23:30:20.800 -> tail 4
23:30:20.800 -> chksum 0x07
23:30:20.800 -> load 0x3ffe8850, len 9276, room 4
23:30:20.800 -> tail 8
23:30:20.800 -> chksum 0xba
23:30:20.800 -> csum 0xba
rf[112] : 00
23:30:20.983 -> rf[113] : 00
23:30:20.983 -> rf[114] : 00

23:30:21.019 -> SD⸮"@j⸮⸮

or something simillar at 74880 bauds an next

Code: Select allready

at 115200 bauds. When I send AT command or anything different, it sends the message back. If I connect DTR from converter to RST pin, it sends

Code: Select allAT
23:35:02.858 ->
23:35:02.858 -> ERROR


If I connect GPIO0 to ground, it sends

Code: Select all23:38:21.529 ->  ets Jan  8 2013,rst cause:1, boot mode:(1,0)
23:38:21.564 ->


It sends all messages back, when RST pin isn't connected an does nothing if RST is connected to DTR.

Is there any way to get it working and flash NodeMCU firmware?