ESP8266 Community Forum

- Mon Apr 06, 2015 2:39 pm #13662 How is the esp8266 connected to the Arduino? How do you shift from 5v to 3.3v?

How do you capture the output posted in the first post?

- Mon Apr 06, 2015 3:10 pm #13668

How is the esp8266 connected to the Arduino? How do you shift from 5v to 3.3v?

How do you capture the output posted in the first post?

I use the following wiring(for softwareserial):


Or the same but pins 1-0 for rx--tx when directly.

I capture the output just by running the sketch and openning the serial monitor with the selected baud rate(19200 in my case). Then it just start running...

I didn't down the 5v to 3.3 for rx-tx. For the + I connect it to the 3.3v from arduino.

- Mon Apr 06, 2015 6:06 pm #13687 1) you must shift the Arduino tx to 3.3v or you will damage the esp8266
2) the 3.3v pin of arduino can supply 150ma max...The esp8266 can drain up to 300ma.... you will damage the Arduino. Use an external power or a voltage regulator
3) how can you read the output if it's through software serial?

- Tue Apr 07, 2015 12:25 am #13710

1) you must shift the Arduino tx to 3.3v or you will damage the esp8266
2) the 3.3v pin of arduino can supply 150ma max...The esp8266 can drain up to 300ma.... you will damage the Arduino. Use an external power or a voltage regulator
3) how can you read the output if it's through software serial?

Ok, thanks for the answer. I will try modifying the wiring the way you say.

The output is captured by reading the softwareserial (esp8266 is the name in my sketch) and printing it into the Serial. I don't know if this is what you mean.

Check the sendData function, maybe I explain it not clear or I am wrong with what I do.