Fail of the week with ESP8266 Cheap Wifi

RE: Fail of the week with ESP8266 Cheap Wifi

e14 Contributor — Mon, 09 Feb 2015 10:55:24 GMT

Did you try flashing the firmware? When I ordered the ESP-01 it came without a firmware. So burn the official firmware and let me know the status.

RE: Fail of the week with ESP8266 Cheap Wifi

e14 Contributor — Wed, 17 Dec 2014 05:50:39 GMT

Thanks...its been 24 years since playing with electronics and man am I rusty. I love the programming part of it now. Thanks for the tip Javier.

Hooked up 2 double AA batteries and it stays on nicely....to program I put GPIO0 to low but when i try to talk to it it only echos back what I say.. When i take GPIO0 off of low and remove the TX and RX from the arduino I can then see the WIFI on my cellphone. Any reason why i am getting echo? I tried using Terminal and the arduino serial interface.

Dave

RE: Fail of the week with ESP8266 Cheap Wifi

e14 Contributor — Tue, 16 Dec 2014 20:27:03 GMT

I'm on vacation all week and decided to try again. It is definitely a power issue. The Arduino Uno doesn't like it. Someone mentioned that you can see the WIFI network on there cellphone and there it was called ESP_985A74. It was dropping out. I have my voltmeter checking the voltage and its weird that it seems to only work when i have the voltmeter connected....Weird but could it be giving it an extra boost to start up quickly? I ordered the correct hardware last night so I will see how it goes when that stuff gets here from Hong Kong. I do not recommend the Arduino UNO.

Dave

RE: Fail of the week with ESP8266 Cheap Wifi

e14 Contributor — Mon, 15 Dec 2014 04:02:25 GMT

Thanks for the help guys...I just cant get connected to it using the Arduino. I can see the arduino trying to talk with it but it does not respond.

RE: Fail of the week with ESP8266 Cheap Wifi

e14 Contributor — Sun, 14 Dec 2014 20:29:17 GMT

Hi Guys I'm very confused about this ESP03 chip. After watching countless hours of videos and reading, what do i actually have to connect to get this to work? I understand that I can only use 3.3volts. I cannot find a valid print to use to possibly get this to work. Do I only have to connect those wires as mentioned above

"Connect these lines

CONNECT GPIO15 TO GROUND

CONNECT CH_PD TO HIGH"

to be able to talk to this or do I have to connect VCC , GND, UTXD and URXD also? Also I believe that the Arduino RX and TX is 5 volts as well, so I guess I would have to use a voltage divider with those as well. Am I on the right track?

I burned up one chip soldering it together. Then I think I might have blown another one connecting the TX and RX to the arduino. Got two left so Help would be appreciated.

Thanks,

Dave

RE: Fail of the week with ESP8266 Cheap Wifi

scargill — Fri, 05 Dec 2014 22:34:18 GMT

In my humble opinion the ESP-01 is marginally the better bet - sure it does not have all the pins brought out - but then I can get 2 working IO pins out of the ESP-01 - but 5 out of the ESP-03 - if I don't mind struggling with those 2mm spacings (which are a PAIN if you're using normal breadboard) - at least the ESP-01 uses a 0.1" double pole header. What I would like to see is the ESP-01 with a decent 3v3 reg (DON'T try using a tiny one) and level shift on input and reset... that would make it directly compatible with many systems out there like Arduinos for example. Now, given that you can get an ESP-01 for £2.20 and an Arduino for just under £3 - that just raises a whole lot of possibilities

Regards

Peter Scargill

RE: Fail of the week with ESP8266 Cheap Wifi

hansaya — Mon, 03 Nov 2014 03:13:58 GMT

YAY!, got it working after countless hours of playing with this.

Connect these lines

CONNECT GPIO15 TO GROUND

CONNECT CH_PD TO HIGH

test this with serial terminal with 9600bud

This should get the device going but then you need to change the firmware because the one came with mine did not reply to my AT commands

CONNECT GPIO 0 TO GROUND

with the the pins above. Then go with normal procedures to change the firmware. (115200bud)

Cloud updating your Wi07C ESP8266 now! | Electrodragon Blog

After the firmware update, you still need to keep the GPIO15 at ground to work.

[View:/resized-image/__size/548x442/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-50fd8c77-0994-4d5a-b45a-ff4ada9d0674/contentimage_5F00_177447.jpg:548:442]

RE: Fail of the week with ESP8266 Cheap Wifi

hansaya — Mon, 03 Nov 2014 02:53:02 GMT

I got this ESP-3 module to work, at-least to print something. Connect the GPIO 15 line to ground and use terminal at 9600 bud. That printed

[System Ready, Vendor:www.ai-thinker.com]

But module is not responding to any of my AT commands. Now i'm trying to get this into the firmware update mode so i can put something else. I'll post if i figure something out

RE: Fail of the week with ESP8266 Cheap Wifi

e14 Contributor — Sat, 01 Nov 2014 12:02:56 GMT

Hola tocayo, I still have not received my ESP8266 card. But I read the documentation and see that in the ESP-03 GPIO15 must be connected to ground, can this be you problem?

RE: Fail of the week with ESP8266 Cheap Wifi

camuyano — Mon, 20 Oct 2014 01:23:37 GMT

Update:

I manage to get some data on the terminal window but not much. Still all a fail. I soldered a second module, and wire it up using a voltage divider circuit to protect the module. However I found no good results.

Reading on the chip documentation, there is a chip enable. I am pulling it up high, however it makes no difference. Only thing I get is gibberish when plugin the module.

Anything I send to the module I get nothing. I am not giving up and soon I should get other versions of the module to keep on trying.

I have tried as many serial baud rates as I can. Also changed the bits size, parity and what not. Also tried with several power sources. On the web it says this module is power hungry. I do not have much options for power sources for now. Might need to build me a 3.3V power supply that has plenty of power.

All tests were done with the same laptop on Linux Mint and Windows 7. Tried several serial software including the Arduino serial monitoring.

Tried with a usb to serial TTL as well as with an Arduino Uno board.

Also tried to connect from the native serial port of the Raspberry pi (since it is 3.3V) but nothing.

All feels like I am sending data to an incorrect pin. There is limited documentation on these boards but should be more than enough to make it work. This battle is in a difficult place, but the war is far from finish. I will continue hacking on this until it works. But if I get a different version working before this one, this may be postponed until I get more ideas. This specific model will look very nice into a custom board, because it is very small but first I need to work with it on the bread board. I will love to get this working and soon it will be.

This is a picture of the only thing I am seeing (exactly the same with two boards).

[View:/resized-image/__size/620x354/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-50fd8c77-0994-4d5a-b45a-ff4ada9d0674/3823.contentimage_5F00_177446.png:620:354]

I am doing something wrong here, but do not know what. Hope to find out, if this happen to anyone else drop a line on what got it working.

RE: Fail of the week with ESP8266 Cheap Wifi

jw0752 — Sat, 18 Oct 2014 06:44:08 GMT

Hi Javier, This type of problem happens to me frequently. The good part is that I usually end up learning more from my experience than I would have if the thing worked right the first time. I look forward to hearing how you get it to work.

John