Need Help Uploading noemcu esp8266-12 and testing AT commands with Arduino

Thread Starter

NathanielZhu

Joined Dec 5, 2011
50
Hi, I bought an ESP8266-12 from China and it finally arrived after a month.

So I'm trying to test it to see if it's working but I'm having trouble doing that.
This version has the AA battery holder included.
I have a video that shows what I've done so far.

Basically, I tried hooking it up to the arduino 3.3v, GND, TX, and RX. But it's not responding to "AT" and yet those mysterious characters somtimes pop up.
I tried uploading nodemcu but my usb-serial converted blinks and nothing happens. The software is still on waiting for mac.

I'm still new to a lot of this stuff so it could be that I miswired something.
 

spinnaker

Joined Oct 29, 2009
7,815
Depends. What does the device's datasheet say?

And are you 100% certain your code is setting to the baud rate you think it is? I am not familiar with Arduino but the Pic can be pretty tricky to set the correct baud rate. It is based off of the clock speed. Maybe you once had the correct settings but later modified the clock speed? I have done that before.
 

Thread Starter

NathanielZhu

Joined Dec 5, 2011
50
I saw that a tutorial used 9600 but that was for the ESP8266-01. I'm having trouble finding good tutorials for the ESP8266-12.

The nodemcu flashing program uses 230400 by default. Since I'm having trouble flashing, maybe it's the connections that isn't working?
I'm gonna try 230400 on my arduino and see if that works.
 

mkbutan

Joined Sep 30, 2008
277
hI
I tried hooking it up to the arduino 3.3v, GND, TX, and RX. But it's not responding to "AT" and yet those mysterious characters somtimes pop up.
I saw that a tutorial used 9600 but that was for the ESP8266-01. I'm having trouble finding good tutorials for the ESP8266-12.

The nodemcu flashing program uses 230400 by default. Since I'm having trouble flashing, maybe it's the connections that isn't working?
I'm gonna try 230400 on my arduino and see if that works.
Even I was getting that Machine Language Charectors as ESP8266 ESP-12e Default Baud Rate is 115200 ..... But I got the Massage at 74880 Baud Rate the FOLLOWING Massage as
ets Jan 8 2013,rst cause:2, boot mode
3,7)

load 0x4010f000, len 1384, room 16
tail 8
chksum 0x2d
csum 0x2d
v09f0c112
~ld
 
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