All Questions
Tagged with esp8266 arduino-mega
44
questions
2
votes
2
answers
140
views
Update the ESP to espduino via NodeMCU Flasher
I am using Cactus Micro Rev2 and I'm trying to communicate with ESP via Mega32U4. I guess I have to update to espduino to be able to program the ESP side.
And I don't know current ESP firmware version....
- 43
1
vote
0
answers
68
views
How can I get an integer from an RFID tag from Arduino Mega to NodeMCU 1.0 over serial communication?
I want the number from an RFID tag read by a reader connected to an Arduino Mega to end up as a string on a NodeMCU connected to the Mega. I am trying to confirm that the string is on the NodeMCU ...
0
votes
1
answer
376
views
Why am I getting a "SendCommand was not declared" Error
#include <Adafruit_Fingerprint.h>
#include <SoftwareSerial.h>
#include <LiquidCrystal.h>
uint8_t id;
int getFingerprintIDez();
//pin #16 is IN from sensor (GREEN wire)
//pin #15 is ...
-2
votes
1
answer
2k
views
What is the maximum size of Static Json Document in Arduino JSON?
I'm trying to do serial communication between Arduino mega and a esp8266, and having issues with determining the size of the JSON document. I have read that the receiver buffer size should be greater ...
0
votes
1
answer
4k
views
Serial communication arduino mega and D1 Wemos Mini
Can anyone help me connecting arduino mega to D1 Wemos Mini serially? Please let me know most efficient and easy steps to setup a communication.
Using that following tutorial:
https://...
1
vote
0
answers
61
views
ESP8266 + Arduino Mega
I am currently carrying out a project where I am using an Arduino Mega2560, to recover data from two ultrasonics sensors (HC-SR-04).
For the purpose of my project, I must add HTTP requests to this, ...
- 11
1
vote
0
answers
549
views
ESP8266 as ISP for Arduino Mega2560
I'm trying to use an ESP8266 Node MCU 1.0 (ESP-12E Module) as an ISP to program an Arduino Mega2560 over Wifi with no USB cable. (USB connected to ESP8266 module just for power).
I used the sketch '...
- 11
-1
votes
1
answer
798
views
Timeout error with Arduino Mega and ESP8266 as the wifi module
I am trying to use the ESP8266 as the wifi module based on this tutorial. My connections are as follows:
ESP8266 <-----------------> Arduino Mega
VCC ------------------> 3.3V (converted ...
- 21
1
vote
1
answer
543
views
Bad Data : Arduino Mega & NodeMCU Serial Communication
Currently I am working on an Arduino project. The project required to establish communication between Arduino Mega and NodeMCU ESP8266. Here are some details about the project:
NodeMCU Rx Pin is ...
- 11
1
vote
0
answers
141
views
Reading data from multiple sensors from Arduino with ESP8266
I am trying to do a project where I need to get data from multiple sensors simultaneously. I am planning to use a Arduino to get the readings from the sensors. I am thinking to control the Arduino ...
- 11
2
votes
0
answers
267
views
Arduino with ESP8266 via serial pass through [duplicate]
I bought an Arduino Mega 2650 alongside a couple of ESP8266 chips hoping to make a wireless project take off.
Using the basic serial passthrough code
void setup() {
Serial.begin(9600);
...
- 21
1
vote
1
answer
382
views
Mega <> esp8266 comms sending baffling data
I have Wemos Mega-ESP8266 board. I have uploaded a simple WebSocket server on the ESP...
#include <ESP8266WiFi.h>
#include <WebSocketsServer.h>
const char* ssid = "SKYNET";
const ...
- 149
2
votes
0
answers
377
views
MKR1010 serial communication
Is communication using tx/rx from an arduino to mkr1010 the same as any other serial communication?
I ask because I can't find any tutorials or info on connecting an arduino to mkr1010, but there are ...
- 21
1
vote
3
answers
453
views
Is it possible to connect many (20+) SPI sensors to an Arduino Mega?
I am making a system for measuring whether or not there is vacuum present in big steel containers. They are located up to 100 meters from the control cabinet.
The question is, how many SPI sensors ...
- 33
1
vote
0
answers
501
views
How to use ESP8266 with Google API for GPS as well as controlling Arduino pins
I am working on IoT based project and I want to control the device using mobile App. Everything works fine, I can switch the load and get the status back on mobile app, but I want to use my ESP8266 as ...
- 111
1
vote
1
answer
2k
views
esp8266 esp-01 printing garbage values on serial monitor
I am trying to up an esp8266 esp-01. While monitoring the serial monitor it's printing garbage values. I am using arduino-mega to write the code to the esp8266. The sample code i'm trying to write is
...
- 111
0
votes
2
answers
580
views
ESP8266 library: 2 requests received instead of 1
I have a strange issue with my sketch using WiFiEsp.h library from https://github.com/bportaluri/WiFiEsp
When i send 1 request to my ESP8266 from my browser as http://192.168.0.25
, it seems that my ...
- 85
0
votes
3
answers
5k
views
WiFi problem on Mega + WiFi R3 ATmega2560 + ESP8266
I've got 2 "Mega + WiFi R3 ATmega2560 + ESP8266" (link) and both have same issue when trying to use the ESP chip.
Hope someone can point me toward something else to try in order to get them working ...
- 159
1
vote
1
answer
224
views
NodeMCU not responding AT after blink app
I've just bought NodeMCU LoLin ESP8266, I tried to send AT commands (after spending days on ESP8266-01) and everything was okay. Than I've uploaded the Blink example to the board, after that moment it'...
- 13
0
votes
1
answer
756
views
UART communication, is it possible to use only the TX line?
I am trying to connect an ESP-01 with an ArduinoMega through the serial port of both, as they use different voltage levels I would need a voltage divider between the TX pin of the Mega (pin 1) and the ...
- 252
-1
votes
1
answer
8k
views
ESP8266 Connection to Arduino Mega 2560
Im trying to connect my esp8266-01 to my arduino mega 2560 to get the code working from the following video tutorial found on youtube:
https://www.youtube.com/watch?v=zGgUfAB4m24
This is the code ...
- 11
1
vote
1
answer
5k
views
Can not initialize ESP module in Arduino SoftwareSerial
Can not initialize ESP module in Arduino SoftwareSerial's example sketch in configuring WiFi module.
In the sketch it tells:
#include "WiFiEsp.h"
// Emulate Serial1 on pins 6/7 if not present
#...
- 11
-1
votes
1
answer
401
views
NodeMCU doesn’t send the sensor read while powering with Vin
I have connected a NodeMCU ESP 12 with the Vin (6 volts) shared with 2 other NodeMCU. The sensors are getting power from the NodeMCU but the NodeMCU isn’t sending to the ThingSpeak cloud unless I ...
1
vote
0
answers
662
views
Arduino Digital Pins Control with ESP8266
I am currently working on my FYP. I need to control 15 servos (13 for x2 Robotic Arms + 2 for Camera) and 4 motors of my Robotic kit via webserver. I have the following options:
NodeMCU
Arduino Mega ...
- 21
1
vote
1
answer
3k
views
How to connect Arduino with ESP8266-11 WiFi module to 000webhost (free webhosting)
I want to know how to connect my Arduino to my website on 000webhost.com (free webhosting account). I'm using ESP-11 WiFi module and it is connected to the internet.
This is my Arduino code:
#...
- 15
1
vote
1
answer
1k
views
Error while uploading code to ESP8266 through Arduino Mega 2560
I am sorry for posting this question for the nth time but I am still not able to find a solution for this error.
I am trying to upload the WiFiScan(Arduino IDE example program)program code to ESP8266 ...
0
votes
2
answers
4k
views
ESP8266 error: espcomm_upload_mem failed while uploading sketch
First of all, I would like to apologize for posting this error once again to this community. However, I have been studying articles for last many days to resolve this error. Unfortunately, I did not ...
- 119
3
votes
1
answer
7k
views
Uploading Arduino code, OTA, via connected ESP8266-12E running Esp-Link
1. A short preliminary introduction
I'm deploying a small network of three MEGAs connected trough an RS-485 bus.
Each MEGA is connected to up to 16 push-buttons (wall-mounted) and two relay-module (...
- 434
1
vote
2
answers
4k
views
Can I use NodeMCU with Arduino to connect to wifi or do I need a separate module?
I am just starting out with electronics. I got a Arduino Mega 2560 board and am able to do simple things like blink. Now I want to start a project on IoT and want to connect this board with internet. ...
- 113
2
votes
0
answers
720
views
Arduino Mega + ESP8266 - Post Data to website issue
I'm trying to post data to my SQL database and it seems that I'm not sending the data correctly. My PHP file is working since I have tried it and it writes to the database.
I am getting an esp.find("...
- 21
1
vote
2
answers
23k
views
connecting ESP8266 to mega 2056
im trying to connect wifi module to my MEGA 2560 board.
i set up the board as the picture bellow
and my program is as follows
#include <SoftwareSerial.h>
#define DEBUG true
SoftwareSerial ...
- 111
2
votes
2
answers
5k
views
How to Factory reset ESP8266? [closed]
I want to use ESP8266 to send emails. I tried twice flashing the Firmware to a particular firmware as suggested in a tutorial. Now both my ESP are unresponsive to AT commands. Let me know the way to ...
- 51
0
votes
2
answers
1k
views
EPS8266 ESP-01 Blue led stays lit unless 3.3v logic divider is bypassed, works when reconnected
I am having a very weird and frustrating issue with this ESP01. I am creating a shield on protoboard, and everything checks out as far as I can tell. I am using a 3.3v voltage divider (1k and 2.2k) ...
- 3
1
vote
1
answer
4k
views
ESP8266 does not respond after changing baud rate to 9600
I have ESP8266 WiFi module and Arduino Mega Board connected. I use external 5 to 3.3 V regulator to power up the module. Common (-ve) line on the external power source and Arduino Mega GND is ...
0
votes
1
answer
1k
views
Opening webpage using ESP8266 in Arduino
I am trying to open the webpage in ESP8266 via Arduino Mega.
I have successfully opened the webpage if I use the AT command in the Serial Monitor
The output is perfect
+IPD,382:HTTP/1.1 200 OK
...
- 103
-2
votes
4
answers
5k
views
ESP8266 sends webpage to client, but html codes appears in browser instead of webpage?
I am using ESP8266 with Arduino MEGA. ESP8266 is powered 3.3v via voltage divider, which is taking 5v from arduino and converting it down to 3.3v with the help of 5K and 10K resistors. AT commands ...
- 191
-1
votes
3
answers
1k
views
No Response from ESP8266 WIFI
I am getting no response back from an ESP8266 WIFI with Arduino Mega using library ITEADLIB_Arduino_WeeESP8266.
//serial monitor response
setup begin
FW Version:
to station + softap ok
Join AP ...
- 509
-1
votes
1
answer
1k
views
3.95 TFT LCD SPI or parallel interface
I would like to get one information about this TFT LCD module . This particular module works with parallel interface with arduino mega and uno.
I am trying to get rid of arduino in my project and use ...
- 165
0
votes
2
answers
211
views
How to integrate ESP8266
Just, to make sure how it works:
I will connect the module to Arduino
it will create AP to which I can connect and send commands via HTTP
So I do not need any special equipment on PC side right, I ...
- 103
1
vote
1
answer
6k
views
Communication between two arduinos over wifi esp8266
I have two arduinos one is Arduino Mega while other is Arduino UNO and I want to send data from UNO to Mega and vice versa over wifi using two ESP8266 wifi modules without use of any router in between,...
1
vote
1
answer
18k
views
Connecting two arduinos using WiFi
I have two arduinos (An UNO R3 and a Mega 2560), and I need to communicate them via two ESP8266 modules to exchange some values.
In one arduino I'll use a SW-420 vibrarion module, and I need to send ...
0
votes
3
answers
12k
views
Issue while connecting ESP8266 with Arduino Mega. It always says “Module have no response.”
I am having Issue while connecting ESP8266 with Arduino Mega. It always says "Module have no response."
Please check and correct me if I am wrong anywhere.
I am using below code and and wiring ...
2
votes
2
answers
5k
views
How much numerical precision can the ESP8266 achieve?
Background: I am trying to port this solar tracker code by Gabriel Miller to run on the ESP8266. Now I'm not a particularly great coder, but I'd like to give it an honest try.
As of recently, the ...
- 25
2
votes
0
answers
2k
views
RESTful API with ESP8266 and arduino mega
Anybody had worked with ESP8266 to post data to RESTful web service? I was trying but it's not posting anything. Tried with a test server:
http://www.posttestserver.com/
Serial.println("\nSetting AT+...
- 131