No comunication between esp and arduino ?

I´ve got this code with each sketch provided :


Hardware used:

Arduino uno compatible board (rfu-328)
Specific dev. board for that rfu-328
Esp-02 version colour blue with firmware 0.95.x uploaded today and downloaded from your website.

I connect:

VCC to 3v3
TX esp-02 to pin 10 arduino
Rx esp-02 to pin 11 arduino
GND esp-02 to gnd pin arduino dev. board
ch-pd esp-02 pin to VCC 3v3


When i uploaded firmware I was able to run AT command but now throught arduino I am getting all time that message I suspect something is wrong maybe connections maybe not but I cant check..

Any sketch to test the esp-02 module will be great so I could know where to start off.

Maybe wiring is not ok but there are no examples about this module I took the one of your example and looked around .
My project involve large distance so I need this module for attach an antenna.


IMAGE OF RFU-328


IMAGE OF ESP-02



Maybe I should use pin 0 and 1 instead of 10 and 11 but I am unsure

Are you level shifting between your RX and TX pins.
This might help :- iot-playground.com/2-uncategorised/17-es...v-arduino-connection

Not sure if you are asking about volt. I use a ftdi that has volt regulator to 3v3 plus circuit only works at 3v3

Look a pic of my circuit:





The FTDI shown in the photo was used to put the firmware and uploaded ok but I need to use it with Arduino in order to have multiple sensors attached

Main usages are :

Load Tensiometer from irrometer value
Load Dht22 (Temp / humidity)

The power source is the usb plus an input you can see in the corner with the cut cables in this photo it is not powered because red light of ftdi doesn´t allow me to make a good photo.


I moved away from this project with arduino and saw I could just run with ESp8266.

I only need to read DHT22 already found an example with lua no modemcu here ( www.esp8266.com/viewtopic.php?f=19&t=1363 ) , and looking for read an analog input of 5v.

Yours dht22 example use arduino but I found why use arduino when you can just avoid it so i moved it away.

I am just new here and your server is very interesting and at this moment I dont know if I will be able to use it with my two type of sensors.

Thanks for your interest.