I am very new to Arduino and this is my very first topic here. I am currently working on car's CAN BUS (500,000bps) communication in order to read and translate the CAN message real time. The UNO together with MCP2515 are connected to the car OBD2 port in order to sniff all supported PID data and the available output are now printed out and it looks promising enough (attached picture). However, I experienced frequent data loss, even though there is the delay of 5 seconds to read the next loop of data. I did try searching but never get any closer to the proper solution. Is this situation is called either Race Condition or data overflow? or I have to take a look at buffer size of transmitted data?
All source file and sketch are referred to https://github.com/sandeepmistry/arduino-OBD2.
Here is the sketch I used (libraries\OBD2-0.0.1\examples\OBD2_01_SupportedPIDs);
Please see the result of printout attached.
[#include <CAN.h> // the OBD2 library depends on the CAN library
#include <OBD2.h>
void setup() {
Serial.begin(9600);
while (!Serial);
Serial.println(F("OBD2 data printer"));
while (true) {
Serial.print(F("Attempting to connect to OBD2 CAN bus ... "));
if (!OBD2.begin()) {
Serial.println(F("failed!"));
delay(1000);
} else {
Serial.println(F("success"));
break;
}
}
Serial.println();
Serial.print("VIN = ");
Serial.println(OBD2.vinRead());
Serial.print("ECU Name = ");
Serial.println(OBD2.ecuNameRead());
Serial.println();
}
void loop() {
// loop through PIDs 0 to 95, reading and printing the values
for (int pid = 0; pid < 96; pid++) {
processPid(pid);
}
Serial.println();
// wait 5 seconds before next run
delay(5000);
}
void processPid(int pid) {
if (!OBD2.pidSupported(pid)) {
// PID not supported, continue to next one ...
return;
}
// print PID name
Serial.print(OBD2.pidName(pid));
Serial.print(F(" = "));
if (OBD2.pidValueRaw(pid)) {
// read the raw PID value
unsigned long pidRawValue = OBD2.pidReadRaw(pid);
Serial.print(F("0x"));
Serial.print(pidRawValue, HEX);
} else {
// read the PID value
float pidValue = OBD2.pidRead(pid);
if (isnan(pidValue)) {
Serial.print("error");
} else {
// print value with units
Serial.print(pidValue);
Serial.print(F(" "));
Serial.print(OBD2.pidUnits(pid));
}
}
Serial.println();
}][1]
Printout of sketch OBD2_03_DataPrinter.ino
Upgrading from a UNO to a Mega2560 solved my problems. Now my sketches upload much faster and the frequent crashes have disappeared. Clearly, the UNO has insufficient memory to cope with a can-bus shield.
Related
I'm desperately looking for a solution for my SIM800l v2. The network LED just keeps blinking every second. It does not restart but it keeps blinking and not picking up a signal.
I tried powering up using a laptop USB port but it does not solve it. I also used a charger adapter that is 5V and 2A but still does not solve the problem. I also tried changing the sim card but still does not solve the problem.
Here is the Wiring diagram that I followed:
Credits to miliohm.com
Code:
SoftwareSerial sim(10, 11);
int _timeout;
String _buffer;
String number = "+6281222329xxx"; //-> change with your number
void setup() {
//delay(7000); //delay for 7 seconds to make sure the modules get the signal
Serial.begin(9600);
_buffer.reserve(50);
Serial.println("Sistem Started...");
sim.begin(9600);
delay(1000);
Serial.println("Type s to send an SMS, r to receive an SMS, and c to make a call");
}
void loop() {
if (Serial.available() > 0)
switch (Serial.read()) {
case 's':
SendMessage();
break;
case 'r':
RecieveMessage();
break;
case 'c':
callNumber();
break;
}
if (sim.available() > 0)
Serial.write(sim.read());
}
void SendMessage() {
//Serial.println ("Sending Message");
sim.println("AT+CMGF=1"); //Sets the GSM Module in Text Mode
delay(200);
//Serial.println ("Set SMS Number");
sim.println("AT+CMGS=\"" + number + "\"\r"); //Mobile phone number to send message
delay(200);
String SMS = "Hello, how are you? greetings from miliohm.com admin";
sim.println(SMS);
delay(100);
sim.println((char)26);// ASCII code of CTRL+Z
delay(200);
_buffer = _readSerial();
}
void RecieveMessage() {
Serial.println ("SIM800L Read an SMS");
sim.println("AT+CMGF=1");
delay(200);
sim.println("AT+CNMI=1,2,0,0,0"); // AT Command to receive a live SMS
delay(200);
Serial.write ("Unread Message done");
}
String _readSerial() {
_timeout = 0;
while (!sim.available() && _timeout < 12000) {
delay(13);
_timeout++;
}
if (sim.available()) {
return sim.readString();
}
}
void callNumber() {
sim.print (F("ATD"));
sim.print (number);
sim.print (F(";\r\n"));
_buffer = _readSerial();
Serial.println(_buffer);
}
I was also stuck on this for ages. Got a DC-DC converter to ensure I had the right voltage. I connected caps on both sides of the DC-DC. I tried most everything to no avail.
My issue in the end was the inefficiency of breadboards and jumper wires. So if you are using a breadboard or jumper wires, shorten them as much as possible, like 2-3cm to ensure that enough current can be delivered to the SIM800L module
Try to connect a cap as close as possible between Vcc and GND. If the module connects to the network after you entered the SIM pin the current rises and may causes a voltage drop.
I tried to allow sending and receiving data using 2 Arduino Unos, 2 LORA chips (SX1278 433MHz), 2 antennas and 2 Arduino IDE.
Problem is with the receiving data command.
This is the code for SENDING command:
#include <SPI.h>
#include <LoRa.h>
int counter = 0;
const int ss = 10;
const int reset = 9;
const int dio0 = 2;
void setup() {
Serial.begin(9600);
LoRa.begin(433E6);
LoRa.setPins(ss, reset, dio0);
while (!Serial);
Serial.println("LoRa Sender");
}
void loop() {
Serial.print("Sending packet: ");
Serial.println(counter);
// send packet
LoRa.beginPacket();
LoRa.print("hello ");
LoRa.print(counter);
LoRa.endPacket();
counter++;
delay(5000);
}
On serial monitor, I succeed in sending packages, but not receiving. This is the RECEIVING code:
#include <SPI.h>
#include <LoRa.h>
const int ss = 10;
const int reset = 9;
const int dio0 = 2;
void setup() {
Serial.begin(9600);
LoRa.begin(433E6);
LoRa.setPins(ss, reset, dio0);
while (!Serial);
Serial.println("LoRa Receiver");
}
void loop() {
// try to parse packet
int packetSize = LoRa.parsePacket();
if (packetSize) {
// received a packet
Serial.print("Received packet '");
// read packet
while (LoRa.available()) {
Serial.print((char)LoRa.read());
Serial.print("hello ");
}
// print RSSI of packet
Serial.print("' with RSSI ");
Serial.println(LoRa.packetRssi());
}
}
I used instructions about connections from this git page:
https://github.com/sandeepmistry/arduino-LoRa
To make this board work, I had to explicitly initialize SPI
SPI.begin(/*sck*/ 5, /*miso*/ 19, /*mosi*/ 27, /*ss*/ cs);
It may be the same for yours. Also, you should properly initialize Lora:
while (!LoRa.begin(433E6)) {
Serial.print(".");
delay(500);
}
Serial.println("LoRa Initializing OK!");
With the code you posted, you don't really know if it initialized correcly or if it's actually sending any data.
First I haven't worked with Lora library. I worked with SX1278 libaray. So I can help you with that.
At first here is the link to the libaray - Lora SX1278.h library
Now you might ask why I'm not using the library from the original GitHub repo. Well I faced issue with that library and the issue is this:
The sx1278::getPacket() library function is modified to stabilize the Lora receive functionality. There was a bug which led the esp to panic. The payloadlength read from the REG_FIFO register was not checked for valid value which led to reading the REG_FIFO register read for over 65000 times. Moreover yield() is added in time consuming parts of this function.
That is why I'm using this custom library. Anyway, for you:
You can use this function to send packet:
T_packet_state = sx1278.sendPacketTimeoutACK(ControllerAddress, message); //T_packet_state is 0 if the packet data is sent successful.
Also to receive data use this function:
R_packet_state = sx1278.receivePacketTimeoutACK(); //R_packet_state is 0 if the packet data is received successfully.
And at the beginning of the code just define this few things:
//Lora SX1278:
#define LORA_MODE 10 //Add your suitable mode from the library
#define LORA_CHANNEL CH_6_BW_125 //Ch number and Bandwidth
#define LORA_ADDRESS 3 //Address of the device from which you will send data
uint8_t ControllerAddress = 5; //Address of receiving end device
My first decent answer on StackOverflow. Finger Crossed
I wrote the following codes in Arduino uno with the header file TinyGPSPlus,and uses GPS SKG 13BL(GPS module).
#include <TinyGPS++.h>
#include <SoftwareSerial.h>
/*
This program sketch obtain and print the lati,logi,speed,date and time
It requires the use of SoftwareSerial, and assumes that you have a
9600-baud serial GPS device hooked up on pins 4(rx) and 3(tx).
*/
static const int RXPin = 4, TXPin = 3;
static const uint32_t GPSBaud = 9600;
// The TinyGPS++ object
TinyGPSPlus gps;
// The serial connection to the GPS device
SoftwareSerial ss(RXPin, TXPin);
void setup()
{
Serial.begin(9600);
ss.begin(GPSBaud);
Serial.println(F("GPS LOADING....."));
Serial.println(F("Obtain and print lati,logi,speed,date and time"));
Serial.println(F("Testing by : "));
Serial.println(F("Billa"));
Serial.println();
}
void loop()
{
// This sketch displays information every time a new sentence is correctly encoded.
while (ss.available() > 0)
if (gps.encode(ss.read()))
displayInfo();
if (millis() > 5000 && gps.charsProcessed() < 10)
{
Serial.println(F("No GPS detected: check wiring."));
while(true);
}
}
void displayInfo()
{
Serial.print(F("Location: "));
if (gps.location.isValid())
{
Serial.print(gps.location.lat(), 6);
Serial.print(F(","));
Serial.print(gps.location.lng(), 6);
}
else
{
Serial.print(F("INVALID"));
}
Serial.print(F(" Speed: "));
if (gps.speed.isValid())
{
Serial.print(gps.speed.kmph());
Serial.print(F(" KMPH "));
}
else
{
Serial.print(F("INVALID"));
}
Serial.print(F(" Date : "));
if (gps.date.isValid())
{
Serial.print(gps.date.month());
Serial.print(F("/"));
Serial.print(gps.date.day());
Serial.print(F("/"));
Serial.print(gps.date.year());
}
else
{
Serial.print(F("INVALID"));
}
Serial.print(F(" Time : "));
if (gps.time.isValid())
{
int hour= gps.time.hour() + 5;
if (hour < 10) Serial.print(F("0"));
if(hour > 12) hour-=11;
Serial.print(hour);
Serial.print(F(":"));
int minute = gps.time.minute() + 30;
if(minute >= 60) minute-=60;
if (minute < 10) Serial.print(F("0"));
Serial.print(minute);
Serial.print(F(":"));
if (gps.time.second() < 10) Serial.print(F("0"));
Serial.print(gps.time.second());
}
else
{
Serial.print(F("INVALID"));
}
Serial.println();
}
It obtained the required output.Displays the lines of data continusly on serial monitor.
But now i need to get these data exactly at every 5 secs (i.e At every 5 Secs the above code should generate output as per that instant).I tried to do this using delay and rewrote the loop code as follows
void loop()
{
delay(5000);
// This sketch displays information every time a new sentence is correctly encoded.
while (ss.available() > 0)
if (gps.encode(ss.read()))
displayInfo();
if (millis() > 5000 && gps.charsProcessed() < 10)
{
Serial.println(F("No GPS detected: check wiring."));
while(true);
}
}
But this doesnt obtained the output as desired.Can anyone please help me to solve this.Where should i edit and what changes should i make.
This is EXACTLY why I wrote NeoGPS. The example programs for all other libraries are just not structured properly. I'm looking at you, smartDelay()...
NeoGPS is structured around receiving a complete fix from the GPS device. This usually requires several sentences to be received. Other GPS libraries only tell you when one sentence is received. Furthermore, it's difficult to tell if two sentences are from the same 1-second update interval, or two consecutive intervals.
You want to display information once every 5 seconds, but that may be once every 20 sentences. And according to the Arduino millis() clock, it will be about 5000ms, but not exactly. millis() will drift against the GPS interval, depending on how accurate your crystal is. The GPS interval is very accurate,to the limits of the atomic clock, serial baud rate, and GPS device calculation time.
Here is your sketch, modified to use NeoGPS:
#include <NMEAGPS.h>
/*
This program sketch obtain and print the lati,logi,speed,date and time
It requires the use of SoftwareSerial, and assumes that you have a
9600-baud serial GPS device hooked up on pins 4(rx) and 3(tx).
*/
#include <NeoSWSerial.h>
static const int RXPin = 4, TXPin = 3;
NeoSWSerial gpsPort(RXPin, TXPin);
static const uint32_t GPSBaud = 9600;
NMEAGPS gps;
gps_fix fix;
uint8_t fixCount = 0;
void setup()
{
Serial.begin(9600);
gpsPort.begin(GPSBaud);
Serial.println(F("GPS LOADING....."));
Serial.println(F("Obtain and print lati,logi,speed,date and time"));
Serial.println(F("Testing by : "));
Serial.println(F("Billa"));
Serial.println();
}
void loop()
{
while (gps.available( gpsPort )) {
fix = gps.read();
// Once every 5 seconds...
if (++fixCount >= 5) {
displayInfo();
fixCount = 0;
}
}
if ((gps.statistics.chars < 10) && (millis() > 5000)) {
Serial.println( F("No GPS detected: check wiring.") );
while(true);
}
}
void displayInfo()
{
Serial.print(F("Location: "));
if (fix.valid.location) {
Serial.print( fix.latitude(), 5 );
Serial.print( ',' );
Serial.print( fix.longitude(), 5 );
} else {
Serial.print(F("INVALID"));
}
Serial.print(F(" Speed: "));
if (fix.valid.speed) {
Serial.print(fix.speed_kph());
Serial.print(F(" KMPH "));
} else {
Serial.print(F("INVALID"));
}
// Shift the date/time to local time
NeoGPS::clock_t localSeconds;
NeoGPS::time_t localTime;
if (fix.valid.date && fix.valid.time) {
using namespace NeoGPS; // save a little typing below...
localSeconds = (clock_t) fix.dateTime; // convert structure to a second count
localSeconds += 5 * SECONDS_PER_HOUR + 30 * SECONDS_PER_MINUTE; // shift timezone
localTime = localSeconds; // convert back to a structure
}
Serial.print(F(" Date : "));
if (fix.valid.date) {
Serial.print(localTime.month);
Serial.print('/');
Serial.print(localTime.date);
Serial.print('/');
Serial.print(localTime.year);
} else {
Serial.print(F("INVALID"));
}
Serial.print(F(" Time : "));
if (fix.valid.time) {
Serial.print(localTime.hours);
Serial.print(':');
if (localTime.minutes < 10) Serial.print('0');
Serial.print(localTime.minutes);
Serial.print(':');
if (localTime.seconds < 10) Serial.print(F("0"));
Serial.print(localTime.seconds);
} else {
Serial.print(F("INVALID"));
}
Serial.println();
}
This sketch displays every fifth fix, without using the inaccurate millis(), or the nasty delay(). Ain't nobody got time for dat!
And each fix is accumuated from all the sentences in each 1-second interval, whether it's one sentence (RMC?), or 8 sentences (GGA, GLL, RMC, GSV*3, GSA and VTG). In NeoGPS, counting fixes is equivalent to counting seconds.
NOTE: if you need a super-accurate 5-second interval, consider using the PPS pin, if available.
The local time is CORRECTLY computed in this sketch, even if the timezone shift steps into a new hour, day, month or year. Your sketch does not cross day boundaries correctly. 5.5 hour shift, if I read your sketch correctly.
Should I mention NeoGPS is smaller, faster and more accurate than all other libraries? :) It's available from the Arduino IDE Library Manager, under the menu Sketch -> Include Library -> Manage Libraries.
You should also consider using something besides SoftwareSerial. It is very inefficient, because it disables interrupts for long periods of time. This can interfere with other parts of your sketch or with other libraries.
The best software serial port library is AltSoftSerial. If you can switch to pins 8 & 9, I would strongly recommend doing so.
If you can't switch pins (are you really sure?), you should use my NeoSWSerial. It works on any two pins, and is almost as efficient. It supports the 9600 baud rate you are using.
You should avoid using the normal delay function when working with this library, as it requires a new fix at a regular interval. In the example code you will find a function called smartDelay()copy this function in to your code and use this instead. It looks like this.
static void smartDelay(unsigned long ms)
{
unsigned long start = millis();
do
{
while (ss.available())
gps.encode(ss.read());
} while (millis() - start < ms);
}
Put this code in the bottom of your code at call smartDelay(5000); instead of delay(5000); in the bottom of the void loop()
You should also place the call to displayInfo(); just below smartDelay() like this.
void loop()
{
while (ss.available() > 0)
if (gps.encode(ss.read()))
if (millis() > 5000 && gps.charsProcessed() < 10) {
Serial.println(F("No GPS detected: check wiring."));
while(true);
}
smartDelay(5000);
displayInfo();
}
Edit: A even better way
A even better way, especially if you like to do other stuff while you showing the data, is to use millis(). this will also be called more precise every 5 sec.
You wil have to declare a variable at the top for this to work. It will look like this.
long timeToDisplay = 0; // Declare this at the top
void loop()
{
while (ss.available() > 0)
if (gps.encode(ss.read()))
if (millis() > 5000 && gps.charsProcessed() < 10) {
Serial.println(F("No GPS detected: check wiring."));
while(true);
}
if(timeToDisplay <= millis()) {
timeToDisplay = millis() + 5000;
displayInfo();
}
}
slash-dev give me an answer on how to get data in 5 secs interval from GPS.He also provided some improved methods, which when i followed obtains perfect output.It solved some bugs in the code i provided too.Link to the answer :
https://stackoverflow.com/a/43009260/7699452
result :
https://i.stack.imgur.com/pzvsu.png
I am trying to wait for user input to start a program operation and then when the user sends a stop command, the loop stops running. I have been unable to get the Serial port to keep reading an input while the loop is running.
So I want the user to Press 1 and then it'll go into the loop and will display the data from the interrupt. But I want it to keep monitoring the Serial Input so when I type in 2, I will get out of the loop and stop printing to the Serial Port.
The serial port isn't registering my second input.
I left out some of the code, but the important stuff should be there.
int userStart = 0; // Holder for user input to start program
int userStop = 0; // Holder for user input to stop program
void setup() {
Serial.begin(115200);
pinMode(motorEncoderA, INPUT);
digitalWrite(motorEncoderA, HIGH); // Pull up resistor
pinMode(motorEncoderB, INPUT);
digitalWrite(motorEncoderB,HIGH); // Pull up resistor
// Interrupt on change of Pin A
attachInterrupt(digitalPinToInterrupt(2), encoderFunc, CHANGE);
Serial.print("Press 1 to start the Process & 2 to Stop");
}
void loop() {
if (Serial.available() > 0)
{
userStart = Serial.read();
if (userStart = 1) {
Serial.print('\n');
while(userStop != 2) {
unsigned long timee = millis();
// Only update if the shaft has moved
if (encoderPositionLast != rotationCounter) {
Serial.print("Time: ");
Serial.print(timee);
Serial.print(" Count: ");
Serial.print (rotationCounter);
Serial.print('\n');
encoderPositionLast = rotationCounter;
Serial.print(userStart);
}
if (Serial.available() > 0) {
userStop = Serial.read();
Serial.print(userStop);
}
}
}
}
Well, I think your problem is that userStart and userStop should not be 1 and 2, but '1' and '2'.
That said, there are some things in your code I dislike.
First of all why is everybody using int as the base type for all numeric variables? If one single byte is enough, use it. On 32bit machines int and byte are almost the same, but on 8bit ones working with ints wastes space and time.
Secondly, I highly discourage you to block the loop function, otherwise you won-t be able to do anything else. Instead, use a variable to track wheter you are running or not, update it with the serial interface, and then execute the code if you are running.
This code should do it. And IMHO it is much better than blocking the loop:
bool running = false;
void setup()
{
...
running = false;
}
void loop()
{
if (Serial.available() > 0)
{
switch(Serial.read())
{
case '1':
running = true;
Serial.print('\n');
break;
case '2':
running = false;
Serial.print("stopped");
break;
}
}
if (running)
{
unsigned long timee = millis();
// Only update if the shaft has moved
if (encoderPositionLast != rotationCounter) {
Serial.print("Time: ");
Serial.print(timee);
Serial.print(" Count: ");
Serial.print (rotationCounter);
Serial.print('\n');
encoderPositionLast = rotationCounter;
Serial.print("running");
}
}
}
I am trying to configurate my XBee module by an Arduino pro mini that is connected to my computer by de FTDI basic from sparkfun.
I already can write and send data from the Xbee to another Xbee module by the Arduino.
My problem is that I want to configure the Xbee by the arduino. I am sending ‘+++’ with the arduino to my Xbee and want to receive the ‘OK’ from the Xbee with the serial monitor from the arduino editor. The problem is that I can send it but never receive and ‘OK’, and when I am trying to configure the Xbee the configuration never happened. So I cant reach the Xbee command line.
uint8_t pinRx = 0, pinTx = 1; //Initialise pins on the Arduino
char GotChar;
long BaudRate = 4800;
int incomingByte=0;
SoftwareSerial mySerial( pinRx , pinTx ); //Initialise SoftwareSerial
void init_USB()
{
Serial.begin(BaudRate);
Serial.println("Start");
mySerial.begin(BaudRate);
}
void init_XBee()
{
Serial.begin(9600);
int check = 0;
while(T_XBEE_CONTROLLER_CheckOK() == 0)
{
Serial.println("CheckOK");
Serial.write("+++");
delay(2000);
}
Serial.println("ATCH 8\r");
delay(2000);
Serial.write("ATID 1234\r");
delay(2000);
Serial.write("+++");
delay(2000);
Serial.write("ATPL 0\r");
delay(2000);
Serial.write("+++");
delay(2000);
Serial.write("ATAP 2\r");
delay(2000);
}
int T_XBEE_CONTROLLER_CheckOK()
{
char ch[2];
ch[0] = 0x00;
while(! ((ch[0] == 'O' ) && (ch[1] == 'K') ))
{
ch[0] = mySerial.read();
ch[1] = mySerial.read();
if((ch[0] != 'O') && (ch[1] != 'K') && (ch[2] != '\r'))
{
Serial.println("FAILED");
return 0;
}
Serial.println("SUCCES");
return 1;
}
return 0;
}
it is a stupid answer but first of all, you should check that your Xbee is configured as AT device instead of API device. If it is API mode, the module wont understand the messages.
To do that you just have to use X-CTU application and read the configuration of the module, and change it to AT device.
Hope that helps.
Thanks for the response and the help, and also sorry for the late response.
I already solved the problem. The problem was the function write(). If you want to reach the command mode from the XBee you should only send "+++". If there is some kind of character behind the "+++" you can't reach the command line. The function write put a (for me) unknown character behing the "+++". So that's the problem for not reaching the command line.
To resolve this problem just use the function print("+++"). After using this function it is possible to reach the command line.
You have to read from the serial right after you send the +++ command, because this is where the xbee writes 'OK'. Also a better way to respect the guard times is to wait for a reply, and test to see if it is 'OK'.
Here is my code, I don't remember if it was working the last time I checked but I will just paste it here and you can modify it as you like. All it does is broadcast A1, B2, C3, etc.
There's a lot of commenting out where I was experimenting, but the regular comments are informative. Make sure you go through it step by step, it's quite simple when you get your head around it. Don't forget to change the destination address low to 0xFFFF if you want to broadcast.
In the end you'll come to the same realisation I did that AT mode is not suitable for configuring the xbee by writing programs.
For example I had an xbee constantly transmitting the number '2', and when another xbee was entering command mode using this code, it would receive the number 2 from the remote xbee when it should have received the 'OK' message from the local xbee, thus the program didn't acknowledge it being in command mode and breaking. When entering command mode you'd think an xbee would turn it's receiver off, but that's not the case so you can easily get into trouble.
If you want to do it the right way, have a look at API mode. I have series 1 xbee's so I'm implementing the Digimesh protocol, which so far I haven't seen anyone online do, but it's almost identical to the Zigbee so it's easy. If you'd like I can give you my code for that which can serve as a simple example.
/*
unicast_configure
Configure an XBee for unicast transmission and transmit
some characters to test
*/
#include <SoftwareSerial.h>
// Pins on Bees Shield:
SoftwareSerial xbee(2, 3); // TX, RX
boolean configured;
char c = 'A';
boolean configureRadio() {
// Set the data rate for the SoftwareSerial port:
xbee.begin(9600);
// Put the radio in command mode:
Serial.write("Entering command mode\r");
delay(1000);
while(xbee.available()>0) {xbee.read();}
xbee.write("+++");
while(xbee.available()>0) {xbee.read();}
//delay(1000);
//while(xbee.available() > 0) {Serial.write(xbee.read());}
String ok_response = "OK\r"; // The response we expect
// Read the text of the response into the response variable
// This satisfies the guard time by waiting for the OK message
String response = String("");
while (response.length() < ok_response.length()) {
if (xbee.available() > 0) {
response += (char) xbee.read();
}
}
Serial.println("response1: " + response);
// If we got received OK, configure the XBee and return true:
if (response.equals(ok_response)) {
Serial.println("Enter command mode successful");
// Restore to default values:
Serial.println("Restoring default values before making changes");
xbee.write("ATRE\r");
Serial.println("Setting addr high");
xbee.write("ATDH0\r"); // Destination high
//while(xbee.available() > 0) {Serial.write(xbee.read());}
Serial.println("Setting addr low");
xbee.write("ATDL1\r"); // Destination low-REPLACE THIS
//while(xbee.available() > 0) {Serial.write(xbee.read());}
Serial.println("Setting MY address");
xbee.write("ATMYFFFF\r");
// Apply changes:
Serial.println("Applying changes");
xbee.write("ATAC\r");
/*
///////////////////////////////////////////////
// Write to non-volatile memory:
// Use similar technique as above to satisfy guard time
Serial.write("Saving\r");
xbee.write("ATWR\r");
String response2 = String("");
//while (xbee.available() > 0) {Serial.write(xbee.read());}
while (response2.length() < ok_response.length()) {
if (xbee.available() > 0) {
response2 += (char) xbee.read();
}
}
Serial.println("response2: " + response2);
if (response2.equals(ok_response)) {
Serial.println("Save successful");
}
else { Serial.println("Save not successful");
return false;
}
// And reset module:
Serial.println("Resetting");
xbee.write("ATFR\r");
///////////////////////////////////////////////
*/
Serial.write("Exit command mode\r");
xbee.write("ATCN\r"); // Exit command mode
//while(xbee.available() > 0) {Serial.write(xbee.read());}
Serial.write("Finished\r");
return true;
} else {
return false; // This indicates the response was incorrect
}
}
void setup() {
Serial.begin(9600); // Begin serial
configured = configureRadio();
}
void loop() {
// Test transmission:
if (configured) {
xbee.print(c);
Serial.print(c);
c = c + 1;
if (c > 'Z') { c = 'A'; }
}
else {
Serial.println("Not configured (in loop)");
delay(5000);
Serial.println("Retrying configuration");
configured = configureRadio();
}
delay(1500);
}