I am just getting started with Xbee so any help would be appreciated. I can connect my devices and data is transmitted but it comes out garbled. See example below.
I can connect my devices and data is transmitted but it comes out garbled.
What data is transmitted by what code?
I am playing with some different code I put together to see how Arduino works so its very messy. It monitors the ambient temperature, ground temperature, ambient light and soil moisture. See below.
// include the library code:
#include <LiquidCrystal.h>
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(7, 8, 9, 10, 11, 12);
// which analog pin to connect
#define THERMISTORPIN A1
// resistance at 25 degrees C
#define THERMISTORNOMINAL 10000
// temp. for nominal resistance (almost always 25 C)
#define TEMPERATURENOMINAL 25
// how many samples to take and average, more takes longer
// but is more 'smooth'
#define NUMSAMPLES 5
// The beta coefficient of the thermistor (usually 3000-4000)
#define BCOEFFICIENT 3950
// the value of the 'other' resistor
#define SERIESRESISTOR 10000
// which analog pin to connect
#define THERMISTORPIN2 A2
// resistance at 25 degrees C
#define THERMISTORNOMINAL2 1000
// temp. for nominal resistance (almost always 25 C)
#define TEMPERATURENOMINAL2 25
// how many samples to take and average, more takes longer
// but is more 'smooth'
#define NUMSAMPLES2 5
// The beta coefficient of the thermistor (usually 3000-4000)
#define BCOEFFICIENT2 3100
// the value of the 'other' resistor
#define SERIESRESISTOR2 1000
#define voltageFlipPin1 6
#define voltageFlipPin2 5
#define sensorPin 3
int flipTimer = 1000;
int dis;
int samples[NUMSAMPLES];
int samples2[NUMSAMPLES2];
int photocellPin = 0; // the cell and 10K pulldown are connected to a0
int photocellReading; // the analog reading from the analog resistor divider
void setup() {
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
Serial.begin(9600);
analogReference(EXTERNAL);
pinMode(voltageFlipPin1, OUTPUT);
pinMode(voltageFlipPin2, OUTPUT);
pinMode(sensorPin, INPUT);
}
void setSensorPolarity(boolean flip){
if(flip){
digitalWrite(voltageFlipPin1, HIGH);
digitalWrite(voltageFlipPin2, LOW);
}else{
digitalWrite(voltageFlipPin1, LOW);
digitalWrite(voltageFlipPin2, HIGH);
}
}
void loop() {
lcd.setCursor(0, 0);
uint8_t i;
float average2;
float average;
// take N samples in a row, with a slight delay
for (i=0; i< NUMSAMPLES2; i++) {
samples2 = analogRead(THERMISTORPIN2);
-
delay(10);*
-
}*
-
// average all the samples out*
-
average2 = 0;*
-
for (i=0; i< NUMSAMPLES2; i++) {*
_ average2 += samples2*;_
_ }_
_ average2 /= NUMSAMPLES2;*_
* //Serial.print("Average analog reading2 ");*
* //Serial.println(average2);*
* // convert the value to resistance*
* average2 = 1023 / average2 - 1;*
* average2 = SERIESRESISTOR2 / average2;*
* //Serial.print("Thermistor resistance2 ");*
* //Serial.println(average2);*
* float steinhart2;*
* steinhart2 = average2 / THERMISTORNOMINAL2; // (R/Ro)*
* steinhart2 = log(steinhart2); // ln(R/Ro)*
_ steinhart2 /= BCOEFFICIENT2; // 1/B * ln(R/Ro)_
* steinhart2 += 1.0 / (TEMPERATURENOMINAL2 + 273.15); // + (1/To)*
* steinhart2 = 1.0 / steinhart2; // Invert*
* steinhart2 -= 273.15; // convert to C*
* lcd.print("T=");*
* lcd.print(steinhart2);*
* Serial.print("Ground Temperature=");*
* Serial.print(steinhart2);*
* Serial.print('\n');*
* delay(1000);*
* // take N samples in a row, with a slight delay*
* for (i=0; i< NUMSAMPLES; i++) {*
_ samples = analogRead(THERMISTORPIN);
* delay(10);
}*_
* // average all the samples out*
* average = 0;*
* for (i=0; i< NUMSAMPLES; i++) {*
_ average += samples*;
}
average /= NUMSAMPLES;*_
* //Serial.print("Average analog reading ");*
* //Serial.println(average);*
* // convert the value to resistance*
* average = 1023 / average - 1;*
* average = SERIESRESISTOR / average;*
* //Serial.print("Thermistor resistance ");*
* //Serial.println(average);*
* float steinhart;*
* steinhart = average / THERMISTORNOMINAL; // (R/Ro)*
* steinhart = log(steinhart); // ln(R/Ro)*
_ steinhart /= BCOEFFICIENT; // 1/B * ln(R/Ro)
* steinhart += 1.0 / (TEMPERATURENOMINAL + 273.15); // + (1/To)
steinhart = 1.0 / steinhart; // Invert*
* steinhart -= 273.15; // convert to C*_
* lcd.print(" ET=");*
* lcd.print(steinhart);*
* Serial.print("External Temperature=");*
* Serial.print(steinhart);*
* Serial.print('\n');*
* delay(1000);*
lcd.setCursor(0, 1);
* photocellReading = analogRead(photocellPin); *
* Serial.print("Light=");*
* Serial.print(photocellReading);*
* Serial.print('\n');*
* lcd.print("L=");*
* lcd.print(photocellReading); // the raw analog reading*
* delay(1000);*
//
* setSensorPolarity(true);*
* delay(flipTimer);*
* int val1 = analogRead(sensorPin);*
* delay(flipTimer); *
* setSensorPolarity(false);*
* delay(flipTimer);*
* // invert the reading*
* int val2 = 1023 - analogRead(sensorPin);*
* //*
* reportLevels(val1,val2);*
}
void reportLevels(int val1,int val2){
* int avg = (val1 + val2) / 2;*
* String msg = " M=";*
* msg += avg;*
dis=avg; //May need to change to analogRead
* Serial.print("Moisture");*
* Serial.println(msg);*
* //Serial.print('\n');*
* lcd.print(msg);*
if (dis < 850)
{
lcd.print("Dry");
Serial.print("Dry");
Serial.print('\n');
Serial.print('\n');
delay(1000);
}
if (dis > 850)
{
lcd.print("OK");
Serial.print("OK");
Serial.print('\n');
Serial.print('\n');
delay(1000);
}
}
It's unlikely that your code really looks like that. Modify your post. Select the code. Select the # icon. Save the changes.
Explain something, please:
#define voltageFlipPin1 6
#define voltageFlipPin2 5
Similar names. Both get numbered.
#define NUMSAMPLES 5
#define NUMSAMPLES2 5
Similar names. Only one gets numbered. Why?
int samples[NUMSAMPLES];
int samples2[NUMSAMPLES2];
Similar names. Only one gets numbered. Why?
Actually no, my code does look like that. Like I said, I am using the code to see how things work with xbee as it works fine to lcd and computer connected serial but when I run it to the serial through xbee it comes out strange. Regarding the questions:
#define voltageFlipPin1 6
#define voltageFlipPin2 5
Voltage is flipped between two digital pins to avoid electrolosis. The measurement is taken against the anologe pin.
#define NUMSAMPLES 5
#define NUMSAMPLES2 5
and
int samples[NUMSAMPLES];
int samples2[NUMSAMPLES2];
I am using two different thermistors to measure the temperature, both with different ohms.
Like I said, any help is appreciated.
Like I said, any help is appreciated.
Like I said, you need to post your code correctly.
Don't get you?
Don't get you?
Modify your post. Select the code. Select the # icon. Save the changes.
It ain't rocket surgery.
I would love to see someone do surgery on a rocket....