ESP8266 Community Forum

- Thu Dec 06, 2018 4:48 am #79432 Howdy,

I'll try and make as much sense as I can.

I'm trying to talk to the ESP with an FTDI through a logic level shifter. I'm using a LD33V to power the 3.3V side of the level shifter and ESP. Everything seems wired properly, power and signal are going through as they should from what I can tell from measuring.

When in Tera Term and I reset the ESP via the 3.3V and EN pins, it spits out the garbage to the console, but if I try to type "AT" into the console, nothing happens. The cursor will just sit and flash, sometimes freezing after enter is pressed. In examples I've seen with Tera Term, the baud rate is shown in the top of the window. I'm not sure if that's a version thing, but I don't see that in my window. The baud is set to 9600 when I start the connection.

When reset, the ESP will flash once. I'm not sure if it's supposed to keep flashing, and have read that it might not be getting the power it needs.

Overall, I'm pretty stumped. Any help is appreciated!

- Fri Dec 07, 2018 4:15 am #79451 First: What ESP8266 are you using? (if it's a module, please read my signature below)
From memory, by default AT firmware works at 115200 Baud, though I'm not absolutely sure.
Set the baud rate to 74880 baud (this is not a typo), reset the ESP and copy/paste the output here when you're still at a loss.

Assumption is the mother of all f*ckups. At least: that's what I'm assuming.

- Sun Dec 09, 2018 6:08 am #79480 YOU'RE A WIZARD!
I have no idea what ESP8266 it is. It was bought off SparkFun.
https://www.sparkfun.com/products/13678

Here is the output. Also, I did try to update this thing with ESP8266Flasher. No idea what it did though.

Code: Select allets Jan  8 2013,rst cause:2, boot mode:(3,6)



load 0x40100000, len 25020, room 16

tail 12

chksum 0xef

ho 0 tail 12 room 4

load 0x00000000, len 0, room 12

tail 0

chksum 0xef

load 0x00000000, len 0, room 4

tail 0

chksum 0xef

csum 0xef

csum err

ets_main.c


And thank you!

- Mon Dec 10, 2018 3:19 am #79491 On esp-01 with low memory they usually flash old AT fw with 9600 baud standard.
Be aware that by default "echo" is off an the fw needs cr/lf (not cr alone).