Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

how to drive esp8266-07

Status
Not open for further replies.
A

alibarghi

Member level 2
Joined
Jun 30, 2013
Messages
42
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
1,559
i use blow circuit to test ESP8266 but not worked .

Untitled.png

i tested with boudrate 9600 , 115200 , 128000 , 38400 , ... But no response was received .
Where is the problem?!!
 

Your module has all IO exposed so GPIO0 and GPIO2 should be high and GPIO15 low for the board to boot normally.
There is already an internal pullup on GPIO0 so you only need to pull GPIO2 high and GPIO15 low (use a 1K or higher resistor for each one to avoid damaging them in case they become outputs).

The operation modes are listed in https://zoetrope.io/tech-blog/esp8266-bootloader-modes-and-gpio-state-startup

ESP8266_bootmodes.jpg

Also if you are using 5v UART adapter it is a good idea to use a 1K resistor between the PC TX -> ESP Rx connection to prevent 5v reaching the 3v inputs.

- - - Updated - - -

Also note that using the 3v line of your UART adapter will probably not work because it can't provide enough current. Either use an external psu or use a 3v regulator on the 5v USB supply
 
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top