Hello
I've some problems with the Arduino Mini. I've a DS18S20 sensor connected to pin 6 of the arduino.
I uploaded the sketch below. After the upload when i opened the serial monitor all worked fine and the temperature number are printed like this :
1 86
24.37
1 85
24.31
1 86
24.37
1 86
24.37
So i unplugged the arduino from the power source (usb with arduino2serial adaptator) and wait about 5 minutes.
Then i plugged the power source and then nothing... The arduino seems to sleep. I open the serial monitor and nothing appear.
When i reload the sketch all work fine again until i unplug the power source.
I've tried with a brand new Arduino mini rev5 and it was the same.
What is the problem ? I'm blocked
I wanted to create a wireless sensor with an xbee series 2 API. I was thinking that the xbee causing some problems, so i write the same code without xbee management but i had the same problem...
(Sorry for my english, i'm french 
)
Thank you
#include <SoftwareSerial.h>
#include <OneWire.h>
long previousMillis = 0; // will store last time LED was updated
long interval = 2000; // interval at which to blink (milliseconds)
//Temperature chip i/o
int DS18S20_Pin = 6; //DS18S20 Signal pin on digital 6
OneWire ds(DS18S20_Pin); // on digital pin 6
int statusLed = 13;
int errorLed = 11;
void setup(void) {
pinMode(statusLed, OUTPUT);
pinMode(errorLed, OUTPUT);
digitalWrite(statusLed, HIGH);
digitalWrite(errorLed, HIGH);
Serial.begin(9600);
}
void loop(void) {
unsigned long currentMillis = millis();
if(currentMillis - previousMillis > interval) {
// save the last time you blinked the LED
previousMillis = currentMillis;
digitalWrite(statusLed, HIGH);
float temperature = getTemp();
Serial.println(temperature);
digitalWrite(statusLed, LOW);
}
}
void flashLed(int pin, int times, int wait) {
digitalWrite(pin, LOW);
for (int i = 0; i < times; i++) {
digitalWrite(pin, HIGH);
delay(wait);
digitalWrite(pin, LOW);
if (i + 1 < times) {
delay(wait);
}
}
digitalWrite(pin, HIGH);
}
float getTemp(){
//returns the temperature from one DS18S20 in DEG Celsius
byte data[12];
byte addr[8];
if ( !ds.search(addr)) {
//no more sensors on chain, reset search
ds.reset_search();
return -1000;
}
if ( OneWire::crc8( addr, 7) != addr[7]) {
Serial.println("CRC is not valid!");
return -1000;
}
if ( addr[0] != 0x10 && addr[0] != 0x28) {
Serial.print("Device is not recognized");
return -1000;
}
ds.reset();
ds.select(addr);
ds.write(0x44,1); // start conversion, with parasite power on at the end
byte present = ds.reset();
ds.select(addr);
ds.write(0xBE); // Read Scratchpad
for (int i = 0; i < 9; i++) { // we need 9 bytes
data[i] = ds.read();
}
ds.reset_search();
byte MSB = data[1];
byte LSB = data[0];
float tempRead = ((MSB << 8) | LSB); //using two's compliment
float TemperatureSum = tempRead / 16;
Serial.print(MSB,HEX);
Serial.print(" ");
Serial.print(LSB,HEX);
Serial.println();
return TemperatureSum;
}
The code with the xbee attached :
#include <SoftwareSerial.h>
#include <XBee.h>
#include <OneWire.h>
long previousMillis = 0; // will store last time LED was updated
long interval = 1000; // interval at which to blink (milliseconds)
long xbeeInterval=6000;
//Temperature chip i/o
int DS18S20_Pin = 6; //DS18S20 Signal pin on digital 6
OneWire ds(DS18S20_Pin); // on digital pin 6
//SoftwareSerial xbeeSerial(4,5);
// create the XBee object
XBee xbee = XBee();
uint8_t payload[] = { 0, 0 };
// SH + SL Address of receiving XBee
XBeeAddress64 addr64 = XBeeAddress64(0x0013a200, 0x40B14DE4);
ZBTxRequest zbTx = ZBTxRequest(addr64, payload, sizeof(payload));
ZBTxStatusResponse txStatus = ZBTxStatusResponse();
int statusLed = 13;
int errorLed = 11;
void setup(void) {
pinMode(statusLed, OUTPUT);
pinMode(errorLed, OUTPUT);
digitalWrite(statusLed, HIGH);
digitalWrite(errorLed, HIGH);
Serial.begin(9600);
delay(1000);
Serial.println("Serial port ok !");
xbeeSerial.begin(9600);
Serial.println("Xbee Serial port initialized !");
delay(1000);
xbee.setSerial(xbeeSerial);
}
void loop(void) {
unsigned long currentMillis = millis();
if(currentMillis - previousMillis > interval) {
// save the last time you blinked the LED
previousMillis = currentMillis;
float temperature = getTemp();
Serial.println(temperature);
delay(2000);
}
}
void flashLed(int pin, int times, int wait) {
digitalWrite(pin, LOW);
for (int i = 0; i < times; i++) {
digitalWrite(pin, HIGH);
delay(wait);
digitalWrite(pin, LOW);
if (i + 1 < times) {
delay(wait);
}
}
digitalWrite(pin, HIGH);
}
float getTemp(){
//returns the temperature from one DS18S20 in DEG Celsius
byte data[12];
byte addr[8];
if ( !ds.search(addr)) {
//no more sensors on chain, reset search
ds.reset_search();
return -1000;
}
if ( OneWire::crc8( addr, 7) != addr[7]) {
Serial.println("CRC is not valid!");
return -1000;
}
if ( addr[0] != 0x10 && addr[0] != 0x28) {
Serial.print("Device is not recognized");
return -1000;
}
ds.reset();
ds.select(addr);
ds.write(0x44,1); // start conversion, with parasite power on at the end
byte present = ds.reset();
ds.select(addr);
ds.write(0xBE); // Read Scratchpad
for (int i = 0; i < 9; i++) { // we need 9 bytes
data[i] = ds.read();
}
ds.reset_search();
byte MSB = data[1];
byte LSB = data[0];
float tempRead = ((MSB << 8) | LSB); //using two's compliment
float TemperatureSum = tempRead / 16;
//Send Temp byte to xBee
sendData(MSB,LSB);
Serial.print(MSB,HEX);
Serial.print(" ");
Serial.print(LSB,HEX);
Serial.println();
return TemperatureSum;
}
void sendData(byte Msb, byte Lsb) {
// break down 10-bit reading into two bytes and place in payload
payload[0] = Lsb;
payload[1] = Msb;
xbee.send(zbTx);
// flash TX indicator
flashLed(statusLed, 1, 100);
// after sending a tx request, we expect a status response
// wait up to half second for the status response
if (xbee.readPacket(5000)) {
// got a response!
// should be a znet tx status
if (xbee.getResponse().getApiId() == ZB_TX_STATUS_RESPONSE) {
xbee.getResponse().getZBTxStatusResponse(txStatus);
// get the delivery status, the fifth byte
if (txStatus.getDeliveryStatus() == SUCCESS) {
// success. time to celebrate
flashLed(statusLed, 6, 150);
} else {
// the remote XBee did not receive our packet. is it powered on?
flashLed(errorLed, 6, 150);
}
}
} else if (xbee.getResponse().isError()) {
//nss.print("Error reading packet. Error code: ");
//nss.println(xbee.getResponse().getErrorCode());
} else {
// local XBee did not provide a timely TX Status Response -- should not happen
flashLed(errorLed, 6, 150);
}
delay(xbeeInterval);
}