Hi everyone
I would like to measure the water level in my tanks using a HC-SRO4 sensor. If I connect it to the Arduino UNO and read from the serial port, I get the measurement displayed on my PC ok.
ie. Distance to Target is 9.03 Centimeters
However, the tanks are some distance from the house so I need to use the Ethernet to get back to the router via Cat 5e cable.
(I used an example for my sketch) shown below.
#include <Ethernet.h>
#include <Ethernet.h>
#include <b64.h>
#include <HttpClient.h>
#include <Ethernet.h>
/*
Web Server
A simple web server that shows the value of the analog input pins.
using an Arduino Wiznet Ethernet shield.
Circuit:
* Ethernet shield attached to pins 10, 11, 12, 13
* Analog inputs attached to pins A0 through A5 (optional)
created 18 Dec 2009
by David A. Mellis
modified 9 Apr 2012
by Tom Igoe
modified 02 Sept 2015
by Arturo Guadalupi
*/
#include <SPI.h>
#include <Ethernet.h>
// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = {
0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
};
IPAddress ip(192, 168, 0, 106);
// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(80);
void setup() {Ethernet.init(10);
// You can use Ethernet.init(pin) to configure the CS pin
//Ethernet.init(10); // Most Arduino shields
//Ethernet.init(5); // MKR ETH shield
//Ethernet.init(0); // Teensy 2.0
//Ethernet.init(20); // Teensy++ 2.0
//Ethernet.init(15); // ESP8266 with Adafruit Featherwing Ethernet
//Ethernet.init(33); // ESP32 with Adafruit Featherwing Ethernet
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Serial.println("Ethernet WebServer");
// start the Ethernet connection and the server:
Ethernet.begin(mac, ip);
// Check for Ethernet hardware present
if (Ethernet.hardwareStatus() == EthernetNoHardware) {
Serial.println("Ethernet shield was not found. Sorry, can't run without hardware. :(");
while (true) {
delay(1); // do nothing, no point running without Ethernet hardware
}
}
if (Ethernet.linkStatus() == LinkOFF) {
Serial.println("Ethernet cable is not connected.");
}
// start the server
server.begin();
Serial.print("server is at ");
Serial.println(Ethernet.localIP());
}
void loop() {
// listen for incoming clients
EthernetClient client = server.available();
if (client) {
Serial.println("new client");
// an http request ends with a blank line
boolean currentLineIsBlank = true;
while (client.connected()) {
if (client.available()) {
char c = client.read();
Serial.write(c);
// if you've gotten to the end of the line (received a newline
// character) and the line is blank, the http request has ended,
// so you can send a reply
if (c == '\n' && currentLineIsBlank) {
// 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 each analog input pin
for (int digitalChannel = 4; digitalChannel < 9; digitalChannel++) {
int sensorReading = digitalRead(5);
client.print("digital output");
client.print(digitalChannel);
client.print(" is ");
client.print(sensorReading);
client.println("<br />");
}
client.println("</html>");
break;
}
if (c == '\n') {
// you're starting a new line
currentLineIsBlank = true;
} else if (c != '\r') {
// you've gotten a character on the current line
currentLineIsBlank = false;
}
}
}
// give the web browser time to receive the data
delay(1);
// close the connection:
client.stop();
Serial.println;
}
}
This results in the serial port displaying: ("client disconnected")
new client
GET/HTTP /1.1
Host: 192.168.0.106
I was unable to copy the rest but it seems the ethernet shield is working.
If I type the IP address of the shield (192.168.0.106 into my phone or PC I get the following:
Digital output4 is 0
Digital output5 is 0
Digital output6 is 0
Digital output7 is 0
Digital output8 is 0
Which is I guess what I asked for!
My problem is that as I can only load 1 sketch at a time, I probably need to combine the two sketches. I have spent weeks trying to get this to work so any help would be greatly appreciated.
Many thanks muso
Sorry, I meant to include that. The code came from a utube tutorial by "Top Tech Boy" and it seems to work, I may not have explained my problem all that well, but it seems to come down to (as far as I can understand as a novice in the field) to the fact that I have 2 programs that seem to work? but I don't know enough to combine them. My understanding is that the Arduino UNO can only read one sketch at a time. However I my be wrong.
int trigPin = 6;
int echoPin = 5;
int pingTravelTime;
float pingTravelDistance;
float distanceToTarget;
void setup() {
// put your setup code here, to run once:
pinMode (trigPin,OUTPUT);
pinMode (echoPin,INPUT);
Serial.begin(9600);
}
void loop() {
// put your main code here, to run repeatedly:
digitalWrite(trigPin, LOW);
delayMicroseconds (10);
digitalWrite(trigPin, HIGH);
delayMicroseconds (10);
digitalWrite(trigPin, LOW);
pingTravelTime = pulseIn(echoPin,HIGH);
delay(25);
pingTravelDistance=(pingTravelTime *0.034);
distanceToTarget=pingTravelDistance/2;
Serial.print("Distance to Target is:");
Serial.print(distanceToTarget);
Serial.println("centimeters");
Serial.println(pingTravelTime);
delay(1000);
}
You just need to merge the two sketches. Put the "#include" lines and global variable definitions at the top. Then merge the two 'setup()' functions and two 'loop()' functions into one function each.
#include <Ethernet.h>
// #include <b64.h>
int trigPin = 6;
int echoPin = 5;
int pingTravelTime;
float pingTravelDistance;
float distanceToTarget;
/*
Web Server
A simple web server that shows the value of the analog input pins.
using an Arduino Wiznet Ethernet shield.
Circuit:
Ethernet shield attached to pins 10, 11, 12, 13
Analog inputs attached to pins A0 through A5 (optional)
created 18 Dec 2009
by David A. Mellis
modified 9 Apr 2012
by Tom Igoe
modified 02 Sept 2015
by Arturo Guadalupi
*/
#include <SPI.h>
#include <Ethernet.h>
// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] =
{
0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
};
IPAddress ip(192, 168, 0, 106);
// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(80);
void setup()
{
Ethernet.init(10);
// You can use Ethernet.init(pin) to configure the CS pin
//Ethernet.init(10); // Most Arduino shields
//Ethernet.init(5); // MKR ETH shield
//Ethernet.init(0); // Teensy 2.0
//Ethernet.init(20); // Teensy++ 2.0
//Ethernet.init(15); // ESP8266 with Adafruit Featherwing Ethernet
//Ethernet.init(33); // ESP32 with Adafruit Featherwing Ethernet
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial)
{
; // wait for serial port to connect. Needed for native USB port only
}
Serial.println("Ethernet WebServer");
// put your setup code here, to run once:
pinMode (trigPin, OUTPUT);
pinMode (echoPin, INPUT);
// start the Ethernet connection and the server:
Ethernet.begin(mac, ip);
// Check for Ethernet hardware present
if (Ethernet.hardwareStatus() == EthernetNoHardware)
{
Serial.println("Ethernet shield was not found. Sorry, can't run without hardware. :(");
while (true)
{
delay(1); // do nothing, no point running without Ethernet hardware
}
}
if (Ethernet.linkStatus() == LinkOFF)
{
Serial.println("Ethernet cable is not connected.");
}
// start the server
server.begin();
Serial.print("server is at ");
Serial.println(Ethernet.localIP());
}
void loop()
{
// listen for incoming clients
EthernetClient client = server.available();
if (client)
{
Serial.println("new client");
// an http request ends with a blank line
boolean currentLineIsBlank = true;
while (client.connected())
{
if (client.available())
{
char c = client.read();
Serial.write(c);
// if you've gotten to the end of the line (received a newline
// character) and the line is blank, the http request has ended,
// so you can send a reply
if (c == '\n' && currentLineIsBlank)
{
// 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>");
// Send HTML page contents
digitalWrite(trigPin, LOW);
delayMicroseconds (10);
digitalWrite(trigPin, HIGH);
delayMicroseconds (10);
digitalWrite(trigPin, LOW);
pingTravelTime = pulseIn(echoPin, HIGH);
delay(25);
pingTravelDistance = (pingTravelTime * 0.034);
distanceToTarget = pingTravelDistance / 2;
client.print("Distance to Target is:");
client.print(distanceToTarget);
client.println("centimeters");
client.println(pingTravelTime);
client.println("</html>");
break;
}
if (c == '\n')
{
// you're starting a new line
currentLineIsBlank = true;
}
else if (c != '\r')
{
// you've gotten a character on the current line
currentLineIsBlank = false;
}
}
}
// give the web browser time to receive the data
delay(1);
// close the connection:
client.stop();
Serial.println();
}
}
Hi John, thank you very much for taking the time to reply to my question. I have implemented the
changes you suggested and most of the sketch seems to compile, however about 11 lines from the bottom, it flags the line if (c =='n') It gives me the message "c is not defined in this scope"
I have tried moving it to various parts of the sketch but to no avail. Any ideas. I should add the 6 weeks ago I had never heard of Arduino. I just saw a need to solve a problem I had.
#include <Ethernet.h>
#include <Ethernet.h>
#include <b64.h>
#include <HttpClient.h>
#include <Ethernet.h>
int trigPin=6;
int echoPin=5;
int pingTravelTime;
float pingTravelDistance;
float distanceToTarget;
/*
Web Server
A simple web server that shows the value of the analog input pins.
using an Arduino Wiznet Ethernet shield.
Circuit:
* Ethernet shield attached to pins 10, 11, 12, 13
* Analog inputs attached to pins A0 through A5 (optional)
created 18 Dec 2009
by David A. Mellis
modified 9 Apr 2012
by Tom Igoe
modified 02 Sept 2015
by Arturo Guadalupi
*/
#include <SPI.h>
#include <Ethernet.h>
// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = {
0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
};
IPAddress ip(192, 168, 0, 106);
// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(80);
void setup() {Ethernet.init(10);
// You can use Ethernet.init(pin) to configure the CS pin
//Ethernet.init(10); // Most Arduino shields
//Ethernet.init(5); // MKR ETH shield
//Ethernet.init(0); // Teensy 2.0
//Ethernet.init(20); // Teensy++ 2.0
//Ethernet.init(15); // ESP8266 with Adafruit Featherwing Ethernet
//Ethernet.init(33); // ESP32 with Adafruit Featherwing Ethernet
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Serial.println("Ethernet WebServer");
//put your setup code here to run once:
pinMode (trigPin,OUTPUT);
pinMode (echoPin,INPUT);
// start the Ethernet connection and the server:
Ethernet.begin(mac, ip);
// Check for Ethernet hardware present
if (Ethernet.hardwareStatus() == EthernetNoHardware) {
Serial.println("Ethernet shield was not found. Sorry, can't run without hardware. :(");
while (true) {
delay(1); // do nothing, no point running without Ethernet hardware
}
}
if (Ethernet.linkStatus() == LinkOFF) {
Serial.println("Ethernet cable is not connected.");
}
// start the server
server.begin();
Serial.print("server is at ");
Serial.println(Ethernet.localIP());
}
void loop() {
// listen for incoming clients
EthernetClient client = server.available();
if (client) {
Serial.println("new client");
// an http request ends with a blank line
boolean currentLineIsBlank = true;
while (client.connected()) {
if (client.available())
{ char c = client.read();
Serial.write(c);
// if you've gotten to the end of the line (received a newline
// character) and the line is blank, the http request has ended,
// so you can send a reply;
if (c == '\n' && currentLineIsBlank){
// 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>");
// Send HTML page contents
digitalWrite (trigPin,LOW);
delayMicroseconds(10);
digitalWrite (trigPin,HIGH);
delayMicroseconds(10);
digitalWrite (trigPin,LOW);
pingTravelTime = pulseIn (echoPin, HIGH);
delay(25);
pingTravelDistance = (pingTravelTime * 0.034);
distanceToTarget = pingTravelDistance / 2;
client.print("Distance to Target is:");
client.print (distanceToTarget);
client.println("centimeters");
client.println(pingTravelTime);
}
client.println("</html>");
break;
}
***if(c == '\n')*** Exit status 1. 'c' was not declared in this scope
{
// you're starting a new line
currentLineIsBlank = true;
} else if (c != '\r')
{
// you've gotten a character on the current line
currentLineIsBlank = false;
}
}
}
// give the web browser time to receive the data
delay(1);
// close the connection:
client.stop();
Serial.println("client disconnected");
}
}