All Questions
Tagged with arduino-uno esp8266
457 questions
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ESP8266 Not Booting Properly on First Power On – Works After Restart
I'm working on an ESP8266-based water level monitoring system using an ultrasonic sensor and an I2C LCD. The problem I'm facing is that sometimes the ESP8266 does not boot properly when powered on for ...
-1
votes
1
answer
894
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How to use ESP12F analog pin to read battery voltage?
I'm using an ESP12F microcontroller powered by a 3.7V battery.
What I want is to get actual information about the battery's state of charge. So to know when the battery needs to recharge.
To achieve ...
- 57
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1
answer
1k
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How to connect an Arduino Uno with an ESP-01 to the Arduino IoT cloud?
I have been trying to connect to the Arduino IoT cloud using my Arduino Uno and an ESP-01.
The Arduino IoT cloud does not recognize my device as genuine. Hence, I've been trying to create a thing and ...
- 111
-1
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1
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356
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Why does an ESP01 WiFi module reset when it's connected to a DC motor/water pump?
When I connect an ESP01 WiFi module and water pump in a parallel circuit to an Arduino Uno's 5 V pin, the ESP01 stops working.
The ESP01's built-in LED starts blinking chaotically and the serial ...
- 57
1
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1
answer
210
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ESP8266 - Where to find pin assignment guide for uploading code?
I try to upload a script which starts a webserver on the ESP8266 with a simple web GUI where the user can enter his WLAN credentials.
/* ===============================================================...
- 109
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1
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203
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ERROR: return reinterpret_cast<T>(pgm_read_ptr(p));
I need to update DHT sensor data to the webserver in JSON format using ESP8266. This is my code.
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#...
- 21
1
vote
1
answer
340
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ARDUINO DC Motor Control over IR Sensor INPUT
I'm working on a school project where I'm building a small convyeor belt using an ARDUINO, DC motor and IR sensor for moving object detection so my color sensor can read color value.
I'm using single ...
- 19
-3
votes
1
answer
272
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SIM7600 MQTT CONNECTION TO shiftr.io broker
I am trying to use SIM7600 MQTT command to publish and subscribe to shiftr.io broker.
I have not been able to get pass stage of connecting to broker.
I use this
AT+CMQTTCONNECT=0,"tcp://instance....
- 5
1
vote
1
answer
995
views
Problem with using PubSubClient, the "callback" function doesn't seem to work correctly
I have a program that communicate between a esp8266 and a atmega328 using Serial, the esp8266 will connect to a MQTT server running on local network, and publish/subscribe to some topics. In the ...
- 11
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1
answer
272
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An error is shown as sendCommand was not declared in this scope.how to rectify it
#include <LiquidCrystal.h>
LiquidCrystal lcd(2,8,6,5,4,3);
#include <SoftwareSerial.h>
#define RX 9
#define TX 10
//ESP8266 CODE
String AP = "OPPO F11 PRO"; // AP NAME
...
2
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answers
218
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ESP & Servo not communicating well
I have a mystery I was unable to solve and would greatly appreciate it if anyone could shed some light on this.
I have a servo DSS-M15S 270 which I managed to run perfectly fine with Arduino Uno (code ...
- 21
-2
votes
1
answer
189
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How can I connect 2 Arduinos using ESP8266 transiver: ESP01
I have: 2 arduinos UNO, 2 ESP01 transivers. But if that's not enough, I'm ready to buy something else
I need to use one of Arduinos as a wifi hot spot, and the second as a modem. They should just be ...
- 3
1
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0
answers
164
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Why won't IP mode change to 1 in ESP01 using the AT commands?
I was trying to send some data to a webpage using an Arduino Uno R3 connected to an ESP01. I simply uploaded the BareMinimum and started sending AT commands through the Serial Monitor. It worked fine ...
- 11
1
vote
2
answers
479
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Removing spaces between characters in MD_Parola
I'm using ESP8266 and Max7219 module (8*32) and MD_Parola library. To create my own font, at first I used of MDParolaFontEditor and created the following fonts.
I edited file MD_MAX72xx_font.cpp ...
- 59
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1
answer
342
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Arduino + ESP8266 to send MQTT messages
I'm wondering if an Arduino Uno (or any other 328 family) that connects via Serial to an ESP8266 can send MQTT messages, rather than AT commands.
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