Hello, I am trying to connect esp node mcu 32s to arduino mega through wifi by using wifi module to the arduino and send data form mpu6050 that is connected to esp,to control robotic arm,I am still at the beginning and lost with the code, can anyone guide me how to do it
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Thanks in advance for your cooperation.
what WiFi module do you have on the Mega?
Esp01s,esp8266 wifi
why not connect the MPU6050 to the Mega ? you then don't require the ESP01
Bec the robotic arm will be controlled by mpu6050 that will be placed on my hand so i have to do it with another microcontroller and send the data , till now i did it by uart but , i want to do it wireless through wifi or beletouth, can't decide till now
replace the Mega with an ESP32 device ? you could then use Bluetooth, BLE or WiFi to communicate between the devices
It isTo late now the robotic arm is setup with the mega
Do u know where can i look it up that someone did something similar, communication between esp node mcu 32s and mega , Bluetooth or wifi
Thanks, i will look into it
it is certainly possible to connect a ESP-01S to a mega
the ESP-01 uses 3.3V logic and the Mega 5V so you require a potential divider on the Mega serial Tx output to the ESP-01 Rx input, e.g. using Mega Serial1
the serial data transmitted by the Mega is transmitted to the Serial of the ESP-01, e.g. using the WiFiEspAT library as suggested in post 8 by @Juraj
Then i will be able to send data form esp nodemcu 32s to the mega, which is easier to make it with wifi or Bluetooth?, thanks alot
the ESP-01 only supports WiFi not Bluetooth
I have not used WiFiEspAT library so cannot recommend which is the simplest approach to use
I would tend to use ESP-NOW on both ESP-01 and ESP32 but that would require you programming the ESP-01 which is not simple
Yeah i mean i can get Bluetooth module that can be connected to arduino mega and then try to make communication between esp node mcu 32s and arduino mega via Bluetooth instead of wifi, but i still can't make decision
You need to check out examples of #8 link
Wifi client example (Arduino mega)
/*
Web client
This sketch connects to https
using the WiFi module.
created 13 July 2010
by dlf (Metodo2 srl)
modified 31 May 2012
by Tom Igoe
modified in Jul 2019 for WiFiEspAT library
by Juraj Andrassy https://github.com/jandrassy
*/
#include <WiFiEspAT.h>
const char* server = "api.github.com";
WiFiSSLClient client;
void setup() {
Serial.begin(115200);
while (!Serial);
Serial1.begin(115200);
WiFi.init(Serial1);
if (WiFi.status() == WL_NO_MODULE) {
Serial.println();
Serial.println("Communication with WiFi module failed!");
// don't continue
while (true);
}
// waiting for connection to Wifi network set with the SetupWiFiConnection sketch
Serial.println("Waiting for connection to WiFi");
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.print('.');
}
Serial.println();
Serial.println("Connected to WiFi network.");
Serial.println("Starting connection to server...");
if (client.connect(server, 443)) { // port 443 is the default https port
Serial.println("connected to server");
client.println("GET /repos/jandrassy/WiFiEspAT/commits/master/status HTTP/1.1");
client.print("Host: ");
client.println(server);
client.println("User-Agent: Arduino");
client.println("Connection: close");
client.println();
client.flush();
}
}
void loop() {
// if there are incoming bytes available
// from the server, read them and print them
while (client.available()) {
char c = client.read();
Serial.write(c);
}
// if the server's disconnected, stop the client
if (!client.connected()) {
Serial.println();
Serial.println("disconnecting from server.");
client.stop();
// do nothing forevermore
while (true);
}
}
Example for wifi server (node MCU 32 in your case)
/*
WiFi Web Server
A simple web server that shows the value of the analog input pins.
created 13 July 2010
by dlf (Metodo2 srl)
modified 31 May 2012
by Tom Igoe
modified in Jul 2019 for WiFiEspAT library
by Juraj Andrassy https://github.com/jandrassy
*/
#include <WiFiEspAT.h>
// Emulate Serial1 on pins 6/7 if not present
#if defined(ARDUINO_ARCH_AVR) && !defined(HAVE_HWSERIAL1)
#include <SoftwareSerial.h>
SoftwareSerial Serial1(6, 7); // RX, TX
#define AT_BAUD_RATE 9600
#else
#define AT_BAUD_RATE 115200
#endif
WiFiServer server(80);
void setup() {
Serial.begin(115200);
while (!Serial);
Serial1.begin(AT_BAUD_RATE);
WiFi.init(Serial1);
if (WiFi.status() == WL_NO_MODULE) {
Serial.println("Communication with WiFi module failed!");
// don't continue
while (true);
}
// waiting for connection to Wifi network set with the SetupWiFiConnection sketch
Serial.println("Waiting for connection to WiFi");
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.print('.');
}
Serial.println();
server.begin();
IPAddress ip = WiFi.localIP();
Serial.println();
Serial.println("Connected to WiFi network.");
Serial.print("To access the server, enter \"http://");
Serial.print(ip);
Serial.println("/\" in web browser.");
}
void loop() {
WiFiClient client = server.available();
if (client) {
IPAddress ip = client.remoteIP();
Serial.print("new client ");
Serial.println(ip);
while (client.connected()) {
if (client.available()) {
String line = client.readStringUntil('\n');
line.trim();
Serial.println(line);
// if you've gotten to the end of the HTTP header (the line is blank),
// the http request has ended, so you can send a reply
if (line.length() == 0) {
// send a standard http response header
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connection: close"); // the connection will be closed after completion of the response
client.println("Refresh: 5"); // refresh the page automatically every 5 sec
client.println();
client.println("<!DOCTYPE HTML>");
client.println("<html>");
// output the value of analog input pins
for (int analogChannel = 0; analogChannel < 4; analogChannel++) {
int sensorReading = analogRead(analogChannel);
client.print("analog input ");
client.print(analogChannel);
client.print(" is ");
client.print(sensorReading);
client.println("<br />");
}
client.println("</html>");
client.flush();
break;
}
}
}
// close the connection:
client.stop();
Serial.println("client disconnected");
}
}
this code doesn't compile with esp node mcu 32s
it is for Mega with esp8266 with AT firmware connected
oh, he said this for node MCU 32 in your case, so how i can send this data from esp to Ardunio through wifi, i cant find anything till now