Hello people!
I recently bought a Gravity UART 50,000ppm CO2 sensor.
Found the code on the DFrobot website and it came back with an error message.
I wired it up on the MKR1000
And this is the code found on their website
/***************************************************
* Infrared CO2 Sensor 0-50000ppm(Wide Range)
* ****************************************************
* The follow example is used to detect CO2 concentration.
* @author lg.gang(lg.gang@qq.com)
* @version V1.0
* @date 2016-6-6
* GNU Lesser General Public License.
* See <http://www.gnu.org/licenses/> for details.
* All above must be included in any redistribution
* ****************************************************/
#include <SoftwareSerial.h>
SoftwareSerial mySerial(10, 11); // RX, TX
unsigned char hexdata[9] = {0xFF,0x01,0x86,0x00,0x00,0x00,0x00,0x00,0x79}; //Read the gas density command /Don't change the order
void setup() {
Serial.begin(9600);
while (!Serial) {
}
mySerial.begin(9600);
}
void loop() {
mySerial.write(hexdata,9);
delay(500);
for(int i=0,j=0;i<9;i++)
{
if (mySerial.available()>0)
{
long hi,lo,CO2;
int ch=mySerial.read();
if(i==2){ hi=ch; } //High concentration
if(i==3){ lo=ch; } //Low concentration
if(i==8) {
CO2=hi*256+lo; //CO2 concentration
Serial.print("CO2 concentration: ");
Serial.print(CO2);
Serial.println("ppm");
}
}
}
}
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boycreeper123:
Any fix?
Yes. The problem is that you're using the SoftwareSerial library, which is not compatible with the MKR1000. Luckily, the MKR1000 has a free hardware serial port you can use instead (which is much better anyway).
Do this:
Wire your sensor to pins 13 and 14 on the MKR1000.
Hello there, thanks for the advice.
Unfortunately changing everthing to Serial1 still gave me an error message.
Arduino: 1.8.5 (Windows 10), Board: "Arduino/Genuino MKR1000"
sketch_jan27a:2: error: conflicting declaration 'SoftwareSerial Serial1'
SoftwareSerial Serial1(13, 14); // RX, TX
^
In file included from C:\Users\Korisnik\AppData\Local\Arduino15\packages\arduino\hardware\samd\1.6.18\cores\arduino/delay.h:23:0,
from C:\Users\Korisnik\AppData\Local\Arduino15\packages\arduino\hardware\samd\1.6.18\cores\arduino/Arduino.h:81,
from sketch\sketch_jan27a.ino.cpp:1:
C:\Users\Korisnik\AppData\Local\Arduino15\packages\arduino\hardware\samd\1.6.18\variants\mkr1000/variant.h:172:13: error: 'Serial1' has a previous declaration as 'Uart Serial1'
extern Uart Serial1;
^
C:\Users\Korisnik\Desktop\sketch_jan27a\sketch_jan27a.ino: In function 'void loop()':
sketch_jan27a:23: error: 'mySerial' was not declared in this scope
int ch=mySerial.read();
^
exit status 1
conflicting declaration 'SoftwareSerial Serial1'
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
Here is the current code:
#include <SoftwareSerial.h>
SoftwareSerial Serial1(13, 14); // RX, TX
unsigned char hexdata[9] = {0xFF,0x01,0x86,0x00,0x00,0x00,0x00,0x00,0x79}; //Read the gas density command /Don't change the order
void setup() {
Serial.begin(9600);
while (!Serial) {
}
Serial.begin(9600);
}
void loop() {
Serial1.write(hexdata,9);
delay(500);
for(int i=0,j=0;i<9;i++)
{
if (Serial1.available()>0)
{
long hi,lo,CO2;
int ch=Serial1.read();
if(i==2){ hi=ch; } //High concentration
if(i==3){ lo=ch; } //Low concentration
if(i==8) {
CO2=hi*256+lo; //CO2 concentration
Serial.print("CO2 concentration: ");
Serial.print(CO2);
Serial.println("ppm");
}
}
}
}