ESP8266 Wi-Fi + Arduino upload to Xively and ThingsSpeak

RE: ESP8266 Wi-Fi + Arduino upload to Xively and ThingsSpeak

e14 Contributor — Thu, 23 Jul 2015 14:27:37 GMT

Hello

I’m quite new to arduino and esp8266. Currently I’m trying a simple thing – connect arduino UNO to wifi network using ESP8266 and read a webpage from the internet.

I’m using the AT firmware on ESP8266. I can connect it to wifi and open a TCP connection to web server, pass the URL I want to receive, but I have the following problem:

while (Serial.available()){

char c = Serial.read();

dbgSerial.write(c);

strReceived+=c;

}

This gives me exactly what I need to my debug console – the whole HTTP response together with the content. The moment I comment out the debug output to soft serial, I only get very little data from the server. When I add a delayMicroseconds(50) after Serial.read(), I get a little more data to strReceived, but never as much as when I use the serial debug.

any advice?

AT+GMR output:

AT version:0.21.0.0

SDK version:0.9.5

thank you very much

RE: ESP8266 Wi-Fi + Arduino upload to Xively and ThingsSpeak

e14 Contributor — Tue, 26 May 2015 08:12:44 GMT

You are the first person to mention controlling the esp8266 ch_pd power up/down via an Arduino digital port; excuse my ignorance,but how is this done? just by a direct connection to one of the digital ports and setting the port high/low? or do I need a pullup resistor to Vcc as well?

RE: ESP8266 Wi-Fi + Arduino upload to Xively and ThingsSpeak

rudraxx — Mon, 18 May 2015 02:52:44 GMT

Hello,

Great article.

I am struggling with reading the last value of a channel with ThingSpeak and ESP8266. Have you been able to do that using the Arduino? I could really use some help.

I can access the last val using my browser on my laptop, but havent been able to do that with arduino.

Can you please help me out with the code for that?

I asked on the thingspeak forum but no success.

http://community.thingspeak.com/forum/thingspeak-api/help-with-get-command-arduino-thingspeak-esp8266/

Thank you!

Abhi

RE: ESP8266 Wi-Fi + Arduino upload to Xively and ThingsSpeak

e14 Contributor — Mon, 23 Feb 2015 10:06:39 GMT

According to the Espressif datasheet, at least for the EX model, the inputs are NOT 5V tolerant. Max listed is 3.6V. Where did you see that 5V was okay? I'm a little confused as to whether that is what's messing up my ESP8266, as I'm trying to communicate directly from an Arduino's TX and RX lines without success, although it had worked in the past.

RE: ESP8266 Wi-Fi + Arduino upload to Xively and ThingsSpeak

BigG — Fri, 05 Dec 2014 18:45:59 GMT

Like your Thingspeak write up and the demo charts. Been looking at this too, but debating whether to try out https://www.grovestreams.com/ as alternative to Xively as had same problem.

Wondered about pros and cons of grovestreams vs. thingspeak etc. Would love to hear any views.

RE: ESP8266 Wi-Fi + Arduino upload to Xively and ThingsSpeak

camuyano — Fri, 21 Nov 2014 13:10:38 GMT

Very cool, nice work!

RE: ESP8266 Wi-Fi + Arduino upload to Xively and ThingsSpeak

DAB — Wed, 19 Nov 2014 20:42:40 GMT

Nice post.

How much power do the little RF chips use?

DAB