ESP8266 Community Forum

- Sun Nov 02, 2014 9:51 am #2149 I ordered a few of theses modules but I am having trouble talking to them I found the baud rate is 76800 and I can get some info from the module but it is limited to this.

ets Jan 8 2013,rst cause:1, boot mode:(3,6)

load 0x40100000, len 25032, room 16
tail 8
chksum 0xb6
load 0x3ffe8000, len 3280, room 0
tail 0
chksum 0xba
load 0x3ffe8cd0, len 6492, room 8
tail 4
chksum 0xd6
csum 0xd6

then coolterm gives a 103: Break Condition error and closes the connection.

I have tried almost every different way of wiring it but this result was with GND, VCC, RXD, TXD, RST all connect and then CH_PD held high I am doing this from a arduino as I am waiting for a USB - TTL to arrive.

Any help would be much appreciated.

Image of my module sorry about the quality https://drive.google.com/file/d/0B4NXdQ ... sp=sharing

- Sun Nov 02, 2014 5:39 pm #2160 I have just tried using a leonardo as a usb to serial converter and I get a similar result except reset and CH_PD are held high to get this result!

ets Jan 8 2013,rst cause:2, boot mode:(3,2)

load 0x40100000, len 25032, room 16
tail 8
chksum 0xb6
load 0x3ffe8000, len 3280, room 0
tail 0
chksum 0xba
load 0x3ffe8cd0, len 6492, room 8
tail 4
chksum 0xd6
csum 0xd6


The only difference is it dose not give me the 103 error and the connection stays open!

- Sun Nov 02, 2014 8:34 pm #2165 The baudrate is not 76800.
If they boot you will get some stuff at 76800 but this is not the baudrate in which the you send AT+Commands.
Try 115200 and 9600

And don't go for any other pins than VDD GND CH_PD(HIGH) and RX/TX.

- Mon Nov 03, 2014 6:53 am #2178 Thank you Borstenhorst Now I feel silly! removed the reset and @ 9600 AT+GMR gives me an expected response.

AT+GMR 0018000902

OK

would you assume that the arduino is not able to update the esp8266 as this would require the reset and
cloud update has always returned failed to connect my USB - TTL should arrive tomorrow and now I can talk to it
I have enough to play with until then!

again thank you for the help.