ESP8266 serial WIFI wireless module

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image cheat

overview

picked up 3 3.3 v versions of these. It's been fun trying to get them to work.

1. the 3.3v fdti seems to be 5v

2. the firmware seems bust: 

<Crazy garbage characters>
Ai-Thinker Technology Co. Ltd.

invalid

then I enter: 

AT+RST

and get 

ERROR

going to try and find an updated firmware and flash it.

---

time passes, I enter , stage left.

I found the firware on a dodgey looking site. http://arduino-er.blogspot.ca/2015/05/flash-esp8266-firmware-using-esptoolpy.html 

python esptool.py -p /dev/ttyUSB0 write_flash 0x000000 "AI-v0.9.5.0 AT Firmware.bin"

Had to make sure that ch_pd was to ground and gpio_0 was high ( vcc) 

setserial -g /dev/ttyUSB0
/dev/ttyUSB0, UART: unknown, Port: 0x0000, IRQ: 0, Flags: low_latency

screen /dev/ttyUSB0

and now I get much better results: 

AT

OK
AT+RST

OK

Ok, so now I've done my flasshing , how to I get it to operate?

28800 baud , connect ch_pd to vcc ( 3.3v )

then: 

<�—��þ�‚†‡�‡�‡Š’ú��–ŽŽ�ð��”ž����8‚ƒ:Žþj¤ÔHÈU–‹ÖK—ºÝݹ
¥µ¢¡¥¹­•É¹�½µ5Rj¤4Ej
’U–®®ZËK‚rÊrªB�ÅJj¤4ê«�W‹«��$('QY,H¦MH™˜14, 21:50:58
ready
ATAT+RSTATAT

ERROR
AT+RST

OK
c_ÇÏR[¶fJ[:fJSjîóÂOÂGÇWËj¤ÔHÈU–‹ÖK—ºÝݹ
¥µ¢¡¥¹­•É¹�½µ5Rj¤4Ej
’U–®®ZËK‚rÊrªB�ÅJj¤4ê«�W‹«��$('QY,H¦MH™˜14, 21:50:58
ready
AT

OK
AT

OK
AT+CWLAP

ERROR
AT+CWMODE

ERROR
AT+CWMODE=?
+CWMODE:(1-3)

OK
AT+CWMODE=1

OK
AT+CWLAP
+CWLAP:(3,"sashed_pirate",-75,"dc:fb:02:08:41:10",1)
+CWLAP:(4,"tuxedo",-47,"00:0e:8e:3f:ff:7a",1)
+CWLAP:(4,"ShyWhale",-87,"0c:47:3d:c6:ff:08",1)
+CWLAP:(0,"ShyWhale-guest",-89,"0c:47:3d:c6:ff:0c",1)
+CWLAP:(4,"Rogers06555",-87,"0c:47:3d:2c:32:68",1)
+CWLAP:(3,"dobber_w",-71,"00:23:69:98:06:8d",6)
+CWLAP:(3,"BELL500",-71,"44:e9:dd:46:e9:2a",6)
+CWLAP:(3,"TheGinge",-82,"6c:70:9f:ed:df:5c",6)
+CWLAP:(3,"TheBeaver",-82,"7e:70:9f:ed:df:5c",6)
+CWLAP:(3,"TheGinge",-82,"28:cf:e9:85:e5:54",6)
+CWLAP:(3,"TheBeaver",-83,"2a:cf:e9:85:e5:54",6)
+CWLAP:(3,"gopher",-48,"00:16:b6:cc:4a:51",11)
+CWLAP:(3,"1WI2U9WC",-82,"10:0d:7f:4a:10:db",11)

OK
AT+CWJAP="gopher","XXX"

OK
AT+CWJAP?
+CWJAP:"gopher"

OK
AT+CIPSTATUS
STATUS:2

OK
AT+CWJAP?
+CWJAP:"gopher"

OK
AT+CIFSR=?

OK
AT+CIFSR
+CIFSR:STAIP,"192.168.1.119"
+CIFSR:STAMAC,"18:fe:34:f3:02:92"

OK

esp-12-f

First, to check if the module has been recognised and is accepting commands, just briefly connect the "REST" pin of the ESP-12 to ground, using a jumper. This resets the ESP-12 and you should see something like the screenshot if this works well.

Next, we run the following set of commands in the Serial Terminal:

1. AT

This is just a hello message, and if the ESP-12 is in the correct mode, it will return an "OK" message.

2. AT+GMR

This command returns the firmware version currently on the chip.

3. AT+CWMODE?

This command returns the mode of operation. If the mode is not 3, we will change it to 3 using the following command :

AT+CWMODE=3

This mode makes the ESP8266 behave both as a WiFi client as well as a WiFi Access point.

4. AT+CWLAP

The LAP (List Access Points) lists the WiFi networks around. Next, we choose our WiFi network

5. AT+CWJAP="your_network_name","your_wifi_network_password"

This command JAP (Join Access Point) makes the ESP-12 join your WiFi Network.

6. AT+CIFSR

This command returns the IP address of the ESP-12 as the second line and the gateway IP address as the first line if it managed to connect successfully.

Links

google searches of note: 

+site:hackaday.com esp firmware
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