Initial SCD30 Support
This commit is contained in:
parent
c63132ebe0
commit
b3ae34e730
3 changed files with 233 additions and 2 deletions
155
lib/SCD30/SCD30.cpp
Normal file
155
lib/SCD30/SCD30.cpp
Normal file
|
@ -0,0 +1,155 @@
|
|||
/*
|
||||
SCD30.cpp - Sensirion SCD30 CO2-Sensor Library
|
||||
Copyright (c) 2020-2021, Stefan Brand
|
||||
All rights reserved.
|
||||
Redistribution and use in source and binary forms, with or without
|
||||
modification, are permitted provided that the following conditions are met:
|
||||
1. Redistributions of source code must retain the above copyright notice, this
|
||||
list of conditions and the following disclaimer.
|
||||
2. Redistributions in binary form must reproduce the above copyright notice,
|
||||
this list of conditions and the following disclaimer in the documentation
|
||||
and/or other materials provided with the distribution.
|
||||
3. Neither the name of the copyright holder nor the names of its
|
||||
contributors may be used to endorse or promote products derived from
|
||||
this software without specific prior written permission.
|
||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
||||
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
||||
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||||
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <Arduino.h>
|
||||
#include <inttypes.h>
|
||||
#include <Wire.h>
|
||||
#include "SCD30.h"
|
||||
|
||||
// Default Constructor
|
||||
SCD30::SCD30() {};
|
||||
|
||||
// Constructor with Measuring Interval and Autocalibration Status
|
||||
SCD30::SCD30(uint8_t interval, bool selfcalib) {
|
||||
this->interval = interval;
|
||||
this->selfcalib = selfcalib;
|
||||
}
|
||||
|
||||
// Initialize the Sensor, Enable Constant Measurement, Set Autocalibration and Interval
|
||||
void SCD30::initialize(void) {
|
||||
uint8_t fw[3];
|
||||
// Soft Reset
|
||||
reset();
|
||||
// Send Get Firmware, Workaround to Avoid First Real Command to be Ignored
|
||||
getBytes(SCD30_GET_FW_VER, fw, 3);
|
||||
delay(10);
|
||||
// Start Continous Measurement
|
||||
sendCmd(SCD30_CONT_MEASURE, 0);
|
||||
// Enable/Disable Autocalibration
|
||||
if (selfcalib) {
|
||||
sendCmd(SCD30_AUTOCAL, 1);
|
||||
} else {
|
||||
sendCmd(SCD30_AUTOCAL, 0);
|
||||
}
|
||||
delay(10);
|
||||
// Measurement Interval
|
||||
sendCmd(SCD30_SET_INTERVAL, interval);
|
||||
}
|
||||
|
||||
// Read Data From Sensor and Put Them Into the Payload Array
|
||||
uint8_t SCD30::getSensorData(char *payload, uint8_t startbyte) {
|
||||
uint8_t ready[2] = {0};
|
||||
uint8_t data[18] = {0};
|
||||
// Check if Sensor Data is Available
|
||||
getBytes(SCD30_DATA_READY, ready, 2);
|
||||
if (ready[1] == 1){
|
||||
// Get All Measurements (18 Bytes)
|
||||
getBytes(SCD30_GET_MEASURE, data, 18);
|
||||
|
||||
// CO2 PPM
|
||||
int16_t value = (int16_t)(byteToFloat(data[0], data[1], data[3], data[4]));
|
||||
int16ToPayload(value, payload, startbyte);
|
||||
|
||||
// Temperature
|
||||
value = (int16_t)(byteToFloat(data[6], data[7], data[9], data[10])*100);
|
||||
int16ToPayload(value, payload, startbyte+2);
|
||||
|
||||
// Humidity
|
||||
value = (int16_t)(byteToFloat(data[12], data[13], data[15], data[16])*100);
|
||||
int16ToPayload(value, payload, startbyte+4);
|
||||
}
|
||||
return startbyte+6;
|
||||
}
|
||||
|
||||
// Calibrate the Sensor to 400ppm (Outside Level)
|
||||
void SCD30::calibrate() {
|
||||
sendCmd(SCD30_SET_RECALIB, 400);
|
||||
}
|
||||
|
||||
// Sensor Soft Reset
|
||||
void SCD30::reset(void) {
|
||||
sendCmd(SCD30_RESET);
|
||||
delay(2000); // Bootup Time
|
||||
}
|
||||
|
||||
// Send a Command with Argument
|
||||
void SCD30::sendCmd(uint16_t cmd, uint16_t arg) {
|
||||
uint8_t args[2], crc;
|
||||
args[0] = (arg >> 8);
|
||||
args[1] = (arg & 0xFF);
|
||||
crc = calcCrc(args, 2);
|
||||
|
||||
Wire.beginTransmission(SCD30_ADDR);
|
||||
Wire.write(cmd >> 8);
|
||||
Wire.write(cmd & 0xFF);
|
||||
Wire.write(args[0]);
|
||||
Wire.write(args[1]);
|
||||
Wire.write(crc);
|
||||
Wire.endTransmission();
|
||||
}
|
||||
|
||||
// Send only a Command
|
||||
void SCD30::sendCmd(uint16_t cmd) {
|
||||
Wire.beginTransmission(SCD30_ADDR);
|
||||
Wire.write(cmd >> 8);
|
||||
Wire.write(cmd & 0xFF);
|
||||
Wire.endTransmission();
|
||||
}
|
||||
|
||||
// Read len Number of Bytes from Register reg into Array bytes
|
||||
void SCD30::getBytes(uint16_t reg, uint8_t bytes[], uint8_t len) {
|
||||
sendCmd(reg);
|
||||
delay(3);
|
||||
Wire.requestFrom((uint8_t)SCD30_ADDR, (uint8_t)len);
|
||||
if (Wire.available()) {
|
||||
for (uint8_t i = 0; i<len; i++)
|
||||
bytes[i] = Wire.read();
|
||||
}
|
||||
}
|
||||
|
||||
// Calculate CRC8
|
||||
uint8_t SCD30::calcCrc(uint8_t bytes[], uint8_t len) {
|
||||
uint8_t crc8 = 0xFF;
|
||||
for (uint8_t i = 0; i < len; i++)
|
||||
{
|
||||
crc8 ^= bytes[i];
|
||||
for (uint8_t j = 0; j < 8; j++)
|
||||
{
|
||||
if (crc8 & 0x80)
|
||||
crc8 = (uint8_t)((crc8 << 1) ^ 0x31);
|
||||
else
|
||||
crc8 <<= 1;
|
||||
}
|
||||
}
|
||||
return crc8;
|
||||
}
|
||||
|
||||
// Convert 4 Bytes from the Measurement to a Float Value
|
||||
float SCD30::byteToFloat(uint8_t mmsb, uint8_t mlsb, uint8_t lmsb, uint8_t llsb) {
|
||||
uint32_t iValue = (uint32_t)((((uint32_t)mmsb) << 24) | (((uint32_t)mlsb) << 16) | (((uint32_t)lmsb) << 8) | ((uint32_t)llsb));
|
||||
float fValue = *(float*)&iValue;
|
||||
return fValue;
|
||||
}
|
69
lib/SCD30/SCD30.h
Normal file
69
lib/SCD30/SCD30.h
Normal file
|
@ -0,0 +1,69 @@
|
|||
/*
|
||||
SCD30.h - Sensirion SCD30 CO2-Sensor Library
|
||||
Copyright (c) 2020-2021, Stefan Brand
|
||||
All rights reserved.
|
||||
Redistribution and use in source and binary forms, with or without
|
||||
modification, are permitted provided that the following conditions are met:
|
||||
1. Redistributions of source code must retain the above copyright notice, this
|
||||
list of conditions and the following disclaimer.
|
||||
2. Redistributions in binary form must reproduce the above copyright notice,
|
||||
this list of conditions and the following disclaimer in the documentation
|
||||
and/or other materials provided with the distribution.
|
||||
3. Neither the name of the copyright holder nor the names of its
|
||||
contributors may be used to endorse or promote products derived from
|
||||
this software without specific prior written permission.
|
||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
||||
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
||||
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||||
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#ifndef SCD30_H
|
||||
#define SCD30_H
|
||||
|
||||
#include "../../include/attsensor.h"
|
||||
|
||||
// Sensor I2C Address
|
||||
#define SCD30_ADDR 0x61
|
||||
|
||||
// Commands and Registers
|
||||
#define SCD30_CONT_MEASURE 0x0010
|
||||
#define SCD30_SET_INTERVAL 0x4600
|
||||
#define SCD30_DATA_READY 0x0202
|
||||
#define SCD30_GET_MEASURE 0x0300
|
||||
#define SCD30_AUTOCAL 0x5306
|
||||
#define SCD30_SET_RECALIB 0x5204
|
||||
#define SCD30_SET_TEMPOFFSET 0x5403
|
||||
#define SCD30_SET_ALTCOMP 0x5102
|
||||
#define SCD30_RESET 0xD304
|
||||
#define SCD30_STOP_MEAS 0x0104
|
||||
#define SCD30_GET_FW_VER 0xD100
|
||||
|
||||
class SCD30 : public AttSensor {
|
||||
private:
|
||||
bool selfcalib = false;
|
||||
uint16_t interval = 2;
|
||||
|
||||
void reset(void);
|
||||
void sendCmd(uint16_t cmd, uint16_t arg);
|
||||
void sendCmd(uint16_t cmd);
|
||||
void getBytes(uint16_t register, uint8_t bytes[], uint8_t len);
|
||||
uint8_t calcCrc(uint8_t bytes[], uint8_t len);
|
||||
float byteToFloat(uint8_t mmsb, uint8_t mlsb, uint8_t lmsb, uint8_t llsb);
|
||||
|
||||
public:
|
||||
SCD30();
|
||||
SCD30(uint8_t interval, bool selfcalib);
|
||||
void initialize(void);
|
||||
uint8_t numBytes(void) {return 6;};
|
||||
uint8_t getSensorData(char *payload, uint8_t startbyte);
|
||||
void calibrate();
|
||||
};
|
||||
|
||||
#endif
|
11
src/main.cpp
11
src/main.cpp
|
@ -27,6 +27,9 @@
|
|||
#ifdef HAS_SENSAIRS8
|
||||
#include <SENSAIRS8.h>
|
||||
#endif
|
||||
#ifdef HAS_SCD30
|
||||
#include <SCD30.h>
|
||||
#endif
|
||||
#ifdef HAS_BME280
|
||||
#include <BME280.h>
|
||||
#endif
|
||||
|
@ -301,12 +304,16 @@ void setup()
|
|||
sensors[i] = new SENSAIRS8();
|
||||
i++;
|
||||
#endif
|
||||
#ifdef HAS_BME280
|
||||
#ifdef HAS_SCD30
|
||||
sensors[i] = new SCD30();
|
||||
i++;
|
||||
#endif
|
||||
#ifdef HAS_BME280
|
||||
sensors[i] = new BME280();
|
||||
i++;
|
||||
#endif
|
||||
#ifdef HAS_SHT21
|
||||
sensors[i] = new SHT21()
|
||||
sensors[i] = new SHT21();
|
||||
i++;
|
||||
#endif
|
||||
#ifdef HAS_DS18B20
|
||||
|
|
Loading…
Reference in a new issue