I have tried to get the Ai-Thinker ESP8266 working at all. If you hook it up to an Uno you have garbage returned no matter what the baud rate is. Tried softwareSerial on D3 and D4 (switching pins doesn't help) and over D0 and D1 with no sketch (to send AT commands directly to the device because softwareSerial wasn't working).
I'm using a logic converter from 5v to 3.3v to handle the voltage correctly.
I also know for a fact you can do that. I've done it a bunch with Bluetooth. HC-05.
NOTE: Pins in the wrong order won't return anything, in order to get garbage it needs to be wired correctly.
I also have a FTDI module that functions as another passthrough unit for this. It has a jumper for 3.3v to 5v and will stay on 3.3v as these units are unable to handle 5v.
I used PuTTY in order to view the boot information of this chip. On boot it returns this information.
So here's my issue.
ets Jan 8 2013,rst cause:4, boot mode:(3,7)
load 0x40100000, len 816, room 16
load 0x3ffe8000, len 788, room 8
ho 0 tail 12 room 4
load 0x3ffe8314, len 288, room 12
2nd boot version : 1.2
SPI Speed : 40MHz
SPI Mode : QIO
SPI Flash Size : 4Mbit
jump to run user1
Ai-Thinker Technology Co. Ltd.
At the end of the day this invalid line means that the wifi information (from what I understand) is corrupted. It also refreshes this information over and over and WILL NOT accept AT commands so I can't seem to chase it down.
I am afraid that by attempting to update it if this kind of issue happens it will be bricked.
Both of these modules are opened today and I have tested another 8266 with similar results.
Any help would be appreciated.