BMP180 on arduino pro mini not enough space? D:

7 years 3 months ago #536 by lewys.martin
Sketch uses 24,818 bytes (80%) of program storage space. Maximum is 30,720 bytes.
Global variables use 2,258 bytes (110%) of dynamic memory, leaving -210 bytes for local variables. Maximum is 2,048 bytes.


Anybody know if theres junk I can remove somewhere so that this sketch fits on a pro mini 328 ??
:(



#include <Esp8266EasyIoT.h>
#include <SFE_BMP180.h>
#include <Wire.h>
#include <SoftwareSerial.h>


#define ALTITUDE 301.0 // Altitude of my home
#define ESP_RESET_PIN 12

#define MILS_IN_MIN 60000

#define CHILD_ID_TEMP 0
#define CHILD_ID_BARO 1


int minuteCount = 0;
double pressureSamples[9][6];
double pressureAvg[9];
double dP_dt;

const char *weather[] = {
"stable","sunny","cloudy","unstable","thunderstorm","unknown"};

int forecast = 5;

unsigned long startTime;

SFE_BMP180 bmp180;
Esp8266EasyIoT esp;
SoftwareSerial serialEsp(10, 11);


Esp8266EasyIoTMsg msgTemp(CHILD_ID_TEMP, V_TEMP);
Esp8266EasyIoTMsg msgPress(CHILD_ID_BARO, V_PRESSURE);
Esp8266EasyIoTMsg msgForec(CHILD_ID_BARO, V_FORECAST);

void setup()
{
serialEsp.begin(9600);
Serial.begin(115200); // debug

if (bmp180.begin())
Serial.println("BMP180 init success");
else
{
Serial.println("BMP180 init fail\n\n");
while(1); // Pause forever.
}

startTime = -1;

esp.begin(NULL, ESP_RESET_PIN, &serialEsp, &Serial);

esp.present(CHILD_ID_TEMP, S_TEMP);
esp.present(CHILD_ID_BARO, S_BARO);
}


void loop()
{

for(int i =0; i<10;i++)
{
if (esp.process())
break;
}


if (IsTimeout())
{
char status;
double T,P,p0,a;

status = bmp180.startTemperature();
if (status != 0)
{
// Wait for the measurement to complete:
delay(status);

// Retrieve the completed temperature measurement:
// Note that the measurement is stored in the variable T.
// Function returns 1 if successful, 0 if failure.

status = bmp180.getTemperature(T);
if (status != 0)
{
// Print out the measurement:
Serial.print("temperature: ");
Serial.print(T,2);
Serial.print(" deg C, ");
Serial.print((9.0/5.0)*T+32.0,2);
Serial.println(" deg F");


static int lastSendTempInt;
int temp = round(T *10);

if (temp != lastSendTempInt)
{
lastSendTempInt = temp;
esp.send(msgTemp.set((float)T, 1));
}

status = bmp180.startPressure(3);
if (status != 0)
{
// Wait for the measurement to complete:
delay(status);


status = bmp180.getPressure(P,T);
if (status != 0)
{

p0 = bmp180.sealevel(P,ALTITUDE); // we're at 1655 meters (Boulder, CO)
Serial.print("relative (sea-level) pressure: ");
Serial.print(p0,2);
Serial.print(" mb, ");
Serial.print(p0*0.0295333727,2);
Serial.println(" inHg");


static int lastSendPresInt;
int pres = round(p0 *10);

if (pres != lastSendPresInt)
{
lastSendPresInt = pres;
esp.send(msgPress.set((float)p0, 1));
}

forecast = calculateForecast(p0);
static int lastSendForeInt = -1;


if (forecast != lastSendForeInt)
{
lastSendForeInt = forecast;
esp.send(msgForec.set(weather[forecast]));
}
}
else Serial.println("error retrieving pressure measurement\n");
}
else Serial.println("error starting pressure measurement\n");
}
else Serial.println("error retrieving temperature measurement\n");
}
else Serial.println("error starting temperature measurement\n");

startTime = millis();
}

//delay(5000); // Pause for 5 seconds.
}

boolean IsTimeout()
{
unsigned long now = millis();
if (startTime <= now)
{
if ( (unsigned long)(now - startTime ) < MILS_IN_MIN )
return false;
}
else
{
if ( (unsigned long)(startTime - now) < MILS_IN_MIN )
return false;
}

return true;
}


int calculateForecast(double pressure) {
//From 0 to 5 min.
if (minuteCount <= 5){
pressureSamples[0][minuteCount] = pressure;
}
//From 30 to 35 min.
else if ((minuteCount >= 30) && (minuteCount <= 35)){
pressureSamples[1][minuteCount - 30] = pressure;
}
//From 60 to 65 min.
else if ((minuteCount >= 60) && (minuteCount <= 65)){
pressureSamples[2][minuteCount - 60] = pressure;
}
//From 90 to 95 min.
else if ((minuteCount >= 90) && (minuteCount <= 95)){
pressureSamples[3][minuteCount - 90] = pressure;
}
//From 120 to 125 min.
else if ((minuteCount >= 120) && (minuteCount <= 125)){
pressureSamples[4][minuteCount - 120] = pressure;
}
//From 150 to 155 min.
else if ((minuteCount >= 150) && (minuteCount <= 155)){
pressureSamples[5][minuteCount - 150] = pressure;
}
//From 180 to 185 min.
else if ((minuteCount >= 180) && (minuteCount <= 185)){
pressureSamples[6][minuteCount - 180] = pressure;
}
//From 210 to 215 min.
else if ((minuteCount >= 210) && (minuteCount <= 215)){
pressureSamples[7][minuteCount - 210] = pressure;
}
//From 240 to 245 min.
else if ((minuteCount >= 240) && (minuteCount <= 245)){
pressureSamples[8][minuteCount - 240] = pressure;
}


if (minuteCount == 5) {
// Avg pressure in first 5 min, value averaged from 0 to 5 min.
pressureAvg[0] = ((pressureSamples[0][0] + pressureSamples[0][1]
+ pressureSamples[0][2] + pressureSamples[0][3]
+ pressureSamples[0][4] + pressureSamples[0][5]) / 6);
}
else if (minuteCount == 35) {
// Avg pressure in 30 min, value averaged from 0 to 5 min.
pressureAvg[1] = ((pressureSamples[1][0] + pressureSamples[1][1]
+ pressureSamples[1][2] + pressureSamples[1][3]
+ pressureSamples[1][4] + pressureSamples[1][5]) / 6);
float change = (pressureAvg[1] - pressureAvg[0]);
dP_dt = change / 5;
}
else if (minuteCount == 65) {
// Avg pressure at end of the hour, value averaged from 0 to 5 min.
pressureAvg[2] = ((pressureSamples[2][0] + pressureSamples[2][1]
+ pressureSamples[2][2] + pressureSamples[2][3]
+ pressureSamples[2][4] + pressureSamples[2][5]) / 6);
float change = (pressureAvg[2] - pressureAvg[0]);
dP_dt = change / 10;
}
else if (minuteCount == 95) {
// Avg pressure at end of the hour, value averaged from 0 to 5 min.
pressureAvg[3] = ((pressureSamples[3][0] + pressureSamples[3][1]
+ pressureSamples[3][2] + pressureSamples[3][3]
+ pressureSamples[3][4] + pressureSamples[3][5]) / 6);
float change = (pressureAvg[3] - pressureAvg[0]);
dP_dt = change / 15;
}
else if (minuteCount == 125) {
// Avg pressure at end of the hour, value averaged from 0 to 5 min.
pressureAvg[4] = ((pressureSamples[4][0] + pressureSamples[4][1]
+ pressureSamples[4][2] + pressureSamples[4][3]
+ pressureSamples[4][4] + pressureSamples[4][5]) / 6);
float change = (pressureAvg[4] - pressureAvg[0]);
dP_dt = change / 20;
}
else if (minuteCount == 155) {
// Avg pressure at end of the hour, value averaged from 0 to 5 min.
pressureAvg[5] = ((pressureSamples[5][0] + pressureSamples[5][1]
+ pressureSamples[5][2] + pressureSamples[5][3]
+ pressureSamples[5][4] + pressureSamples[5][5]) / 6);
float change = (pressureAvg[5] - pressureAvg[0]);
dP_dt = change / 25;
}
else if (minuteCount == 185) {
// Avg pressure at end of the hour, value averaged from 0 to 5 min.
pressureAvg[6] = ((pressureSamples[6][0] + pressureSamples[6][1]
+ pressureSamples[6][2] + pressureSamples[6][3]
+ pressureSamples[6][4] + pressureSamples[6][5]) / 6);
float change = (pressureAvg[6] - pressureAvg[0]);
dP_dt = change / 30;
}
else if (minuteCount == 215) {
// Avg pressure at end of the hour, value averaged from 0 to 5 min.
pressureAvg[7] = ((pressureSamples[7][0] + pressureSamples[7][1]
+ pressureSamples[7][2] + pressureSamples[7][3]
+ pressureSamples[7][4] + pressureSamples[7][5]) / 6);
float change = (pressureAvg[7] - pressureAvg[0]);
dP_dt = change / 35;
}
else if (minuteCount == 245) {
// Avg pressure at end of the hour, value averaged from 0 to 5 min.
pressureAvg[8] = ((pressureSamples[8][0] + pressureSamples[8][1]
+ pressureSamples[8][2] + pressureSamples[8][3]
+ pressureSamples[8][4] + pressureSamples[8][5]) / 6);
float change = (pressureAvg[8] - pressureAvg[0]);
dP_dt = change / 40; // note this is for t = 4 hour

minuteCount -= 30;
pressureAvg[0] = pressureAvg[1];
pressureAvg[1] = pressureAvg[2];
pressureAvg[2] = pressureAvg[3];
pressureAvg[3] = pressureAvg[4];
pressureAvg[4] = pressureAvg[5];
pressureAvg[5] = pressureAvg[6];
pressureAvg[6] = pressureAvg[7];
pressureAvg[7] = pressureAvg[8];
}

minuteCount++;

if (minuteCount < 36) //if time is less than 35 min
return 5; // Unknown, more time needed
else if (dP_dt < (-0.25))
return 4; // Quickly falling LP, Thunderstorm, not stable
else if (dP_dt > 0.25)
return 3; // Quickly rising HP, not stable weather
else if ((dP_dt > (-0.25)) && (dP_dt < (-0.05)))
return 2; // Slowly falling Low Pressure System, stable rainy weather
else if ((dP_dt > 0.05) && (dP_dt < 0.25))
return 1; // Slowly rising HP stable good weather
else if ((dP_dt > (-0.05)) && (dP_dt < 0.05))
return 0; // Stable weather
else
return 5; // Unknown
}

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7 years 3 months ago #537 by HarryDutch
Try to use Serial.print(F("xxxxxxxx")) instead of Serial.print("xxxxxxx"). Using the F- macro will save a lot of memory.

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7 years 3 months ago #539 by EasyIoT
Try to comment #define DEBUG in Esp8266EasyIoTConfig.h file. It will remove all debug code.

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7 years 3 months ago #541 by Dennis
And check if you really need 16bit integers on all variables in your code (which is what the arduino "int" data type means) - you could as well use "uint8_t" or "int8_t" data types if you can get along with 8 bit data size...

regards

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7 years 3 months ago #542 by EasyIoT
Of course there's room for optimization. This is just sample code and it works on my Arduino Mega 2560 as part of heather thermostat.

I also recommend to optimize code around double pressureSamples[9][6]; You do not need so many samples, because you always calculate average after 6 samples. Array double pressureSamples[6]; is enough, but you need to change code a little bit.

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7 years 3 months ago - 7 years 3 months ago #543 by lewys.martin

EasyIoT wrote: Try to comment #define DEBUG in Esp8266EasyIoTConfig.h file. It will remove all debug code.

comment it ?



EasyIoT wrote: Of course there's room for optimization. This is just sample code and it works on my Arduino Mega 2560 as part of heather thermostat.

I also recommend to optimize code around double pressureSamples[9][6]; You do not need so many samples, because you always calculate average after 6 samples. Array double pressureSamples[6]; is enough, but you need to change code a little bit.




yes I will be trying to optimise this code for weaker arduinos and will share it when finished :)

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