问题描述
我正在尝试使用Arduino，Ethernet Shield和Xbee Shield进行一些实验.我这样演示我的设置板:
第1组:Arduino Uno + Xbee防护罩:广播信号
第2组:Arduino Uno + Xbee防护板+以太网防护板:接收来自第1组，从AT命令获取信号强度并将其打印到浏览器中.
这里的问题是，我将ATDB命令发送到Serial后，我无法获得结果，实际上，我不确定它是否按预期工作了.
这是我用来检索信号强度的代码.
int data;
void setup()
{
Serial.begin(9600);
}
void receiver_checker(){
delay(1200);
Serial.print("+++");
delay(1200);
bool bOK = false;
while (Serial.available() > 0) {
Serial.write(Serial.read());
bOK = true;
}
if(bOK)
{
Serial.println();
Serial.println("ATDB");
delay(100);
while (Serial.available() > 0) {
Serial.write(Serial.read());
}
Serial.println();
}
Serial.println();
}
void loop()
{
while(Serial.available() > 0){
data = Serial.read();
if(data == '1'){
// Broadcaster 1
//Serial.println("1------------------");
receiver_checker();
}
}
}
这部分工作符合我的预期，它以十六进制数字打印出它收到的最后一个包装的信号强度.
这是我将上一个代码和Web Server教程中的服务器部分结合在一起的代码:
#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[] = {
0xCA, 0xFE, 0x00, 0x00, 0x00, 0x02
};
IPAddress ip(1, 1, 1, 2);
int data;
int count = 0;
char result;
// 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() {
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
// start the Ethernet connection and the server:
Ethernet.begin(mac, ip);
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>");
if (Serial.available() > 0) {
// read the oldest byte in the serial buffer:
data = Serial.read();
// if it's a capital H (ASCII 72), turn on the LED:
if (data == '1') {
count += 1;
client.print("The number of times:");
client.print(count);
result = receiver_checker();
client.print("========================");
client.print(result);
client.print("========================");
}
}
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("client disconnected");
}
}
char receiver_checker(){
char signal;
delay(1200);
Serial.print("+++");
delay(1200);
bool bOK = false;
while (Serial.available() > 0) {
Serial.write(Serial.read());
bOK = true;
}
if(bOK)
{
Serial.println();
Serial.println("ATDB");
delay(100);
while (Serial.available() > 0) {
signal = Serial.read();
}
Serial.println();
}
Serial.println();
return signal;
}
如果还有另一种与Xbee防护罩进行交互的方式无法像我所要求的那样直接通过Serial并直接获得响应，请告诉我！
您的receiver_checker()函数正在从XBee模块读取字符，并仅返回接收到的最后一个字符，这很可能是回车或换行./p>
更新该函数以返回int，并用以下内容替换您的while (Serial.available() > 0):
signal = (int) strtoul(Serial.readString().c_str(), 0, 16);
这是XBee返回十六进制值的时间.如果返回的是十进制值，请将16参数更改为10.
I am trying to do some experiments with Arduino, Ethernet Shield and Xbee Shield.I demonstrate my set up board like this:
Group 1: Arduino Uno + Xbee shield : broadcast the signal
Group 2: Arduino Uno + Xbee shield + Ethernet shield: receive the signal fromgroup 1, get the signal strength from AT command and print it into the browser.
The problem here is I can't get the result after sending to the Serial my ATDB command, actually, I am not sure it did worked as I expected.
Here is the code that I used to retrieve the signal strength.
int data;
void setup()
{
Serial.begin(9600);
}
void receiver_checker(){
delay(1200);
Serial.print("+++");
delay(1200);
bool bOK = false;
while (Serial.available() > 0) {
Serial.write(Serial.read());
bOK = true;
}
if(bOK)
{
Serial.println();
Serial.println("ATDB");
delay(100);
while (Serial.available() > 0) {
Serial.write(Serial.read());
}
Serial.println();
}
Serial.println();
}
void loop()
{
while(Serial.available() > 0){
data = Serial.read();
if(data == '1'){
// Broadcaster 1
//Serial.println("1------------------");
receiver_checker();
}
}
}
This part worked as I expected, it printed out in hex number the signal strength of the last package that it received.
Here is the code I combined the previous one and the server part from Web Server tutorial:
#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[] = {
0xCA, 0xFE, 0x00, 0x00, 0x00, 0x02
};
IPAddress ip(1, 1, 1, 2);
int data;
int count = 0;
char result;
// 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() {
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
// start the Ethernet connection and the server:
Ethernet.begin(mac, ip);
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>");
if (Serial.available() > 0) {
// read the oldest byte in the serial buffer:
data = Serial.read();
// if it's a capital H (ASCII 72), turn on the LED:
if (data == '1') {
count += 1;
client.print("The number of times:");
client.print(count);
result = receiver_checker();
client.print("========================");
client.print(result);
client.print("========================");
}
}
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("client disconnected");
}
}
char receiver_checker(){
char signal;
delay(1200);
Serial.print("+++");
delay(1200);
bool bOK = false;
while (Serial.available() > 0) {
Serial.write(Serial.read());
bOK = true;
}
if(bOK)
{
Serial.println();
Serial.println("ATDB");
delay(100);
while (Serial.available() > 0) {
signal = Serial.read();
}
Serial.println();
}
Serial.println();
return signal;
}
If there is another way to interact with the Xbee shield not go through Serial like I ask and get response directly, please let me know!
Your receiver_checker() function is reading characters back from the XBee module, and just returning the last character received, which is likely a carriage return or line feed.
Update the function to return an int, and replace your while (Serial.available() > 0) with the following:
signal = (int) strtoul(Serial.readString().c_str(), 0, 16);
That's for when the XBee returns a hexadecimal value. If it's returning a decimal value, change the 16 parameter to a 10.
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