Ive had this project working for years, something happened. It was posting to the server but the temp was coming back empty or blank. Its a 3 piece project; Uno grove shield & wifly [wifi bee vr1 from tinysine]. The Grove was mounted over the UNO and the wifly shield was connected to the Grove shield via 4 cables; 5V, GND, 7 & 8.
My code is as follows. If I have pins 4,5 set for the sensor in code and plug in the sensor into jack D4 on the grove shield (which correspond to pins 4 & 5), the co2 comes back fine. Then I connect pin 2 of the grove shield to pin 3 on the wifly and respectively, pin 3 on the grove shield to pin 2 on the wifly, i am not able to connect to the network.
The wifly used to work just fine before I disconnected/reconnected everything. What am I doing wrong. I havent changed anything else {that i know of}
#include <TimeAlarms.h>
#include <WiFlyHQ.h>
#include <SoftwareSerial.h>
#include <avr/wdt.h>
boolean initialiseSensorFlag;
unsigned long initialiseSensorTimestamp;
long previousMillis = 0;
long interval = 1000;
unsigned long duration;
unsigned long starttime;
unsigned long sampletime_ms = 30000;//sampe 30s ;
unsigned long lowpulseoccupancy = 0;
float ratio = 0;
float concentration = 0;
SoftwareSerial wifiSerial(2,3);
#define DEBUG 1
const int pinRx = 5;
const int pinTx = 4;
SoftwareSerial sensor(pinTx,pinRx);
const unsigned char cmd_get_sensor[] =
{
0xff, 0x01, 0x86, 0x00, 0x00,
0x00, 0x00, 0x00, 0x79
};
unsigned char dataRevice[9]; //CO2 Sensor
int temperature; // Store Temp - CO2 sensor
int CO2PPM; // Store CO2 ppm - CO2 sensor
float uvindex; // Store UV - UV Sensor
float mq2ratio; // Store mq2 - MQ2 Sensor
WiFly wifly; //WIFI
String data; //WIFI
const char mySSID[] = "myssid";
const char myPassword[] = "mypass";
const char site[] = "myserver.com";
void terminal();
void setup(){
Serial.begin(115200);
Alarm.timerRepeat(90, MainAlarm); //Every 30 mins
Serial.println("Alarms set!");
wdt_enable(WDTO_8S);
}
void loop(){
Alarm.delay(10); // wait one second between clock display
if (wifly.moduleCrashed==true){
Serial.println("moduleCrashed");
wdt_enable(WDTO_8S);
while (true);
}
wdt_reset();
if(initialiseSensorFlag == true && millis() - initialiseSensorTimestamp > 3000){
initialiseSensorFlag = false;
SampleUVAlarm(); // samples UV & MQ2
wdt_reset();
wifiStuff(); // connect to Wifi
wdt_reset();
reportToCloud(); // post to web
}
}
void wifiStuff(){
///////////////////WiFi CLIENT SETUP////////////////////////////////////////////
char buf[32];
Serial.print("Free memory: ");
Serial.println(wifly.getFreeMemory(),DEC);
wifiSerial.begin(9600);
if (!wifly.begin(&wifiSerial, &Serial)) {
Serial.println("Failed to start wifly");
terminal();
}
/* Join wifi network if not already associated */
if (!wifly.isAssociated()) {
/* Setup the WiFly to connect to a wifi network */
Serial.println("Joining network");
wifly.setSSID(mySSID);
wifly.setPassphrase(myPassword);
wifly.enableDHCP();
if (wifly.join()) {
Serial.println("Joined wifi network");
} else {
Serial.println("Failed to join wifi network");
terminal();
}
} else {
Serial.println("Already joined network");
}
wifly.setDeviceID("Wifly-WebClient2");
Serial.print("DeviceID: ");
Serial.println(wifly.getDeviceID(buf, sizeof(buf)));
if (wifly.isConnected()) {
Serial.println("Old connection active. Closing");
wifly.close();
}
}
void initialiseSensor(){
sensor.begin(9600);
Serial.begin(115200);
Serial.println("********************************************************");
}
void MainAlarm(){
Serial.println("Main Alarm...");
Serial.println(wifly.moduleCrashed);
initialiseSensor();
initialiseSensorFlag = true;
initialiseSensorTimestamp = millis();
}
void reportToCloud() {
data = "";
Serial.println("Reporting to cloud...");
if (wifly.available() > 0) {
char ch = wifly.read();
Serial.write(ch);
if (ch == '\n') {
/* add a carriage return */
Serial.write('\r');
}
}
if (wifly.open(site, 80)) {
Serial.print("Connected to ");
Serial.println(site);
// Set data to send
static char outstr1[15];
static char outstr2[15];
static char outstr3[15];
static char outstr4[15];
String dataString1 = dtostrf(uvindex, 8, 2, outstr1);
String dataString2 = dtostrf(mq2ratio, 8, 2, outstr2);
String dataString3 = dtostrf(CO2PPM, 8, 2, outstr3);
String dataString4 = dtostrf(temperature, 8, 2, outstr4);
data = String("uvindex=" + dataString1 + "&mq2=" + dataString2 + "&age=" + dataString3 + "&name=" + dataString4);
Serial.print(data); //name = temp && age = co2
//Reset all values
uvindex = 0;
mq2ratio = 0;
CO2PPM = 0;
temperature = 0;
/* Send the request */
wifly.println("POST /arduino/data_post.php HTTP/1.0");
wifly.println("Host: www.santiapps.com"); // SERVER ADDRESS HERE TOO
wifly.println("Content-Type: application/x-www-form-urlencoded" );
wifly.print("Content-Length: ");
wifly.println(data.length());
wifly.println();
wifly.print(data);
Serial.println("Posted successfully");
} else {
Serial.println(">>Failed to connect");
}
if (Serial.available() > 0) {
wifly.write(Serial.read());
}
//Added Sat 14 Nov @820am
wifly.close();
}
/* Connect the WiFly serial to the serial monitor. */
void terminal(){
while (1) {
if (wifly.available() > 0) {
Serial.write(wifly.read());
}
if (Serial.available() > 0) {
wifly.write(Serial.read());
}
}
}
void SampleUVAlarm (){
Serial.println("Sampling UV");
int sensorValue = 0;
long sum = 0;
uvindex = 0;
for(int i=0;i<1024;i++)
{
sensorValue=analogRead(A0);
sum=sensorValue+sum;
delay(2);
}
sum = sum >> 10;
Serial.print("The UV voltage value:");
Serial.print(sum*4980.0/1023.0);
Serial.print(" mV");
delay(20);
Serial.print("UVIndex is: ");
uvindex = (307*(sum*4980.0/1023.0))/200; //mW/m2 -> W/m2
Serial.println(uvindex);
Serial.print("\n");
SampleMQ2Alarm();
}
void SampleMQ2Alarm() {
Serial.println("Sampling MQ2");
float sensor_volt = 0;
float RS_gas = 0; // Get value of RS in a GAS
float ratio = 0; // Get ratio RS_GAS/RS_air
mq2ratio = 0;
int sensorValue = analogRead(A1);
sensor_volt=(float)sensorValue/1024*5.0;
RS_gas = (5.0-sensor_volt)/sensor_volt; // omit *RL
//R0 stabilized at 0.08 in secret room
/*-Replace the name "R0" with the value of R0 in the demo of First Test -*/
ratio = RS_gas/0.08; // ratio = RS/R0
/*-----------------------------------------------------------------------*/
Serial.print("MQ2 Sensor_volt = ");
Serial.println(sensor_volt);
Serial.print("RS_ratio = ");
Serial.println(RS_gas);
Serial.print("Rs/R0 = ");
Serial.println(ratio);
mq2ratio = ratio;
Serial.print("\n\n");
delay(1000);
//mq2ratio = 333;
printCO2(); // sample co2
}
void printCO2() {
Serial.println("printing co2...");
if(dataRecieve())
{
Serial.print("Temperature: ");
Serial.print(temperature);
Serial.print(" CO2: ");
Serial.print(CO2PPM);
Serial.println("");
}
delay(1000);
}
bool dataRecieve(void) {
byte data[9];
int i = 0;
CO2PPM = 0;
temperature = 0;
//transmit command data
for(i=0; i<sizeof(cmd_get_sensor); i++)
{
sensor.write(cmd_get_sensor[i]);
}
delay(10);
//begin reveiceing data
if(sensor.available())
{
while(sensor.available())
{
for(int i=0;i<9; i++)
{
data[i] = sensor.read();
}
}
}
//#if DEBUG
for(int j=0; j<9; j++)
{
Serial.print(data[j]);
Serial.print(" ");
}
Serial.println("");
//#endif
if((i != 9) || (1 + (0xFF ^ (byte)(data[1] + data[2] + data[3]
+ data[4] + data[5] + data[6] + data[7]))) != data[8])
{
Serial.println("false returned");
return false;
}
CO2PPM = (int)data[2] * 256 + (int)data[3];
temperature = (int)data[4] - 40;
Serial.println(temperature);
return true;
}
