MQTT Connection = AT Commands + Arduino Uno + ESP8266 | ?? How to ??

Using Arduino Programming Questions
1

Hi,

I have an ESP8266 ESP-01 module connected to an Arduino Uno trough a Software Serial connection in Pins 2 and 3 like this:

1524×930 115 KB

I'm able to successful connect to the dweet.io HTTP server and send the light sensor readings. To do so, I use the following code:

AT+CIPMUX=1
AT+CIPSTART=0,"TCP","dweet.io",80
AT+CIPSEND=0,76
GET /dweet/for/arduino-lighttest?sensorValue=95 HTTP/1.1
Host: dweet.io

AT+CIPCLOSE=0

However, when it comes to MQTT, I don't know how to send similar TCP commands to post Analog sensor values to a MQTT sever... Nevertheless I saw this in a site:

AT+RST
ATE0
AT+CWMODE=1
AT+CWJAP="SSID","password"
AT+CIPMUX=0
AT+CIPCLOSE
AT+CIPSTART="TCP","192.168.10.179",1883
AT+CIPSEND=36
 "  MQIsdp     JeeNode_on_your_deskAT+CIPSEND=13
‚,    /topic AT+CIPSEND=2
AT+CIPSEND=2
AT+CIPSEND=2
...

So my question, is it possible to use ESP8266 ESP-01 with an Arduino Uno board to connect to a MQTT server like you do with an HTTP server, or when it comes to MQTT you simple can't use an ESP8266 with an Arduino Uno Board to send data?

2

To do so, I use the following code:

That isn't code. Those are AT commands.

Nevertheless I saw this in a site:

Something happens when you try that, with appropriate substitutions of course. We can't see what that is, or what your problem really is.

3

PaulS:
That isn't code. Those are AT commands.

Like I told, are AT commands used in a sketch that uses the library <SoftwareSerial.h>. It is code in the sense that was quoted as code... Forum interface!

PaulS:
Something happens when you try that, with appropriate substitutions of course. We can't see what that is, or what your problem really is.

I find these AT commands, I never try them, because I see no logic in them!

The question is very simple, which AT commands to use to communicate with a MQTT server in the same way you communicate with an HTTP server? I read somewhere that the MQTT protocol is a binary protocol and the header is not ASCII text like in HTTP protocol... This is the problem, MQTT protocol is a more complicate one and I don't know how to solve this question, and it looks like no one else does!

4

Hello man, did you solve how use MQTT using just AT commands with the ESP01? I'm looking the same.

5

I m also trying to find solution for this, i couldnt connect to cloudmqtt using wifiesp and pubsubclient library. i get the -2 connection failed error on serial monitor and in the cloudmqtt log it says socket error on client. If you were successfully able to send data to mqtt server , then please help.

6