ESP8266-01 CIPSEND error

IoT Devices
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1

I am using an ESP8266-01 with an Arduino nano. I am able to configure the ESP and connect to the network, but when I attempt to send data to ubidots, it fails with “Error CIPSEND.”

Here is a minimized version of my code:

#include <Filters.h>
#include <UbidotsESP8266.h>
#include <SoftwareSerial.h> 

#define SSID "removed"
#define PASS "removed"

#define TOKEN "removed"
#define ID "removed"

Ubidots client(TOKEN);

// A bunch of other variables for the logic of the program that spits out a single float to be sent to ubidots
float float_variable = 0;

void setup() {
  Serial.begin( 9600 );    // start the serial port
  client.wifiConnection(SSID,PASS);   // connect ESP8266 to network
}

void loop() {
  // A bunch of logic that results in a float variable
  Serial.print(float_variable);
  sendData(float_variable); 
}

void sendData(float data) {
  Serial.print( "\n\nSending data to uibdots\n" );
  client.add(ID,data);
  client.sendAll();
  Serial.print( "\nDone sending.\n" );
}

Here is the output. It's somewhat garbled, but you can get the idea of what's going on.

=>582fc4737625425ae5bdf0ad:0.17$,
Response of ESP8266:
AT+CIPMU=0
OK

Response of ESP8266:
ե�RST@RT=“TP”,“�aoslate.ubidots.com”,0Lj
CONNECT

OK
CLOSED

Response of ESP8266:
AT+CIPM�TT�j

OKC�
Response of ESP8266:
AT+CIPSEND

ERSOR

Error CIPSEND


I've already updated the ubidots-esp8266 library to correct the baud rate (115200 in my case) as documented here: http://community.ubidots.com/t/solved-esp-01-cipmode-error-need-help-with-solving-it/452/21.

Also, I’m using a YwRobot to get accurate 3.3v and 5v and a power logic level converter to protect the 8266 from the Arduino 5v levels.

Does anyone have an idea what’s going wrong?

2

Hi @EpicSalvation

ESP8266’s firmware was recently updated by the library’s provider and AT command’s baud speed was upgraded and it is not working properly with the Arduino Software Serial Library, because Ubidot’s Library uses virtual ports and at high baud rates the new firmware produces noise and right now the communication cannot be set between the ESP and the Arduino using only a written code in an Arduino Sketch.

Because the third party ESP’s firmware library doesn’t rest on us, it is a bit difficult for us to solve easily the issue, we highly recommend to our users to use an arduino Board with two hardware serial ports and not to virtualizate the ports in order to set properly the baud rate without any kind of noise, you can use an Arduino Duemilanove or Mega for having more hardware serial ports Available.

We will be working for trying to solve the issue, but the solution is not trivial and it can take us some time so we gently recommend you to implement your code with a different board or trying a search for an older ESP library firmware.

All the best,
Catalina M.