我正在创建一个程序，该程序使用Adafruit Data Logger Sheild和Arduino Uno板从播种机5003接收数据并将其写入SD卡。它由外部电池组供电，因为其目标是能够在房子中安装它，并使其能够收集数据约2天，或者直到电池用完为止。我只希望它打印出日期，时间，2.5ppm，10ppm，3um，5um。
当前，它将在大约前30次测量中将数据正确打印到SD卡，但随后会反复吐出“ 16962”，并偶尔恢复正常读数（在我家，大约为10-30）一行，然后返回到16962。
它还会在大约4次良好读数后打印到串行监视器，然后校验和失败。
//The first few readings may be all 0's due to the sensor needing to start up
//but the SD card starts before it so it writes 0's since the sensor is not awake yet
#include <SD.h>
#include <SPI.h>
#include <SoftwareSerial.h>
#include <Wire.h>
#include "RTClib.h"
//Real time clock
RTC_PCF8523 rtc;
//The data enterss with pin 0, and writes to pin 10
SoftwareSerial pmsSerial(0, 10);
//SD pin is 10 with the sheild
const int chipSelect = 10;
void setup() {
// our debugging output
Serial.begin(19200);
// sensor baud rate is 9600
pmsSerial.begin(9600);
Serial.print("Initializing SD card...");
// see if the card is present and can be initialized:
if (!SD.begin(chipSelect)) {
Serial.println("Card failed, or not present");
// don't do anything more:
while (1);
}
Serial.println("card initialized.");
//opens CSV file
File csvFile = SD.open("datalog2.csv", FILE_WRITE);
if (csvFile) {
//Headers for the data
csvFile.println("Date,Time,25PPM,100PPM,03UM,05UM");
csvFile.close();
}
//Start the RTC
rtc.begin();
//Uncomment if you need to reset the time and date from a computer -> should only have to if the coin cell battery dies(~5 years)
// rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
}
//Sets up the Plantower 5003 info
struct pms5003data {
uint16_t framelen;
uint16_t pm10_standard, pm25_standard, pm100_standard;
uint16_t pm10_env, pm25_env, pm100_env;
uint16_t particles_03um, particles_05um, particles_10um, particles_25um, particles_50um, particles_100um;
uint16_t unused;
uint16_t checksum;
};
struct pms5003data data;
void loop() {
//Calls the RTC at the moment just before printing to get a snapshot of the current time
DateTime now = rtc.now();
File csvFile = SD.open("datalog3.csv", FILE_WRITE);
if (csvFile) {
//printing the date, time, and PPM info to a CSV file that can be opened in Excel
csvFile.print(now.year());
csvFile.print("/");
csvFile.print(now.month());
csvFile.print("/");
csvFile.print(now.day());
csvFile.print(",");
csvFile.print(now.hour());
csvFile.print(":");
csvFile.print(now.minute());
csvFile.print(":");
csvFile.print(now.second());
csvFile.print(",");
csvFile.print(data.pm25_standard);
csvFile.print(",");
csvFile.print(data.pm100_standard);
csvFile.print(",");
csvFile.print(data.particles_03um);
csvFile.print(",");
csvFile.println(data.particles_05um);
csvFile.close();
}
// Telling it to collect/write data every 1 second (1000) , or 60 seconds (60000)
delay(1000);
if (readPMSdata(&pmsSerial)) {
//Prints to serial monitor
// reading data was successful!
Serial.println();
Serial.println("---------------------------------------");
Serial.println("Concentration Units (standard)");
Serial.print("PM 1.0: "); Serial.print(data.pm10_standard);
Serial.print("\t\tPM 2.5: "); Serial.print(data.pm25_standard);
Serial.print("\t\tPM 10: "); Serial.println(data.pm100_standard);
Serial.println("---------------------------------------");
Serial.println("Concentration Units (environmental)");
Serial.print("PM 1.0: "); Serial.print(data.pm10_env);
Serial.print("\t\tPM 2.5: "); Serial.print(data.pm25_env);
Serial.print("\t\tPM 10: "); Serial.println(data.pm100_env);
Serial.println("---------------------------------------");
Serial.print("Particles > 0.3um / 0.1L air:"); Serial.println(data.particles_03um);
Serial.print("Particles > 0.5um / 0.1L air:"); Serial.println(data.particles_05um);
Serial.print("Particles > 1.0um / 0.1L air:"); Serial.println(data.particles_10um);
Serial.print("Particles > 2.5um / 0.1L air:"); Serial.println(data.particles_25um);
Serial.print("Particles > 5.0um / 0.1L air:"); Serial.println(data.particles_50um);
Serial.print("Particles > 10.0 um / 0.1L air:"); Serial.println(data.particles_100um);
Serial.println("---------------------------------------");
}
}
//Dont touch, from internet, needed for the sensor to work properly
boolean readPMSdata(Stream *s) {
if (! s->available()) {
return false;
}
// Read a byte at a time until we get to the special '0x42' start-byte
if (s->peek() != 0x42) {
s->read();
return false;
}
// Now read all 32 bytes
if (s->available() < 32) {
return false;
}
uint8_t buffer[32];
uint16_t sum = 0;
s->readBytes(buffer, 32);
// get checksum ready
for (uint8_t i=0; i<30; i++) {
sum += buffer[i];
}
/* debugging
for (uint8_t i=2; i<32; i++) {
Serial.print("0x"); Serial.print(buffer[i], HEX); Serial.print(", ");
}
Serial.println();
*/
// The data comes in endian'd, this solves it so it works on all platforms
uint16_t buffer_u16[15];
for (uint8_t i=0; i<15; i++) {
buffer_u16[i] = buffer[2 + i*2 + 1];
buffer_u16[i] += (buffer[2 + i*2] << 8);
}
// put it into a nice struct :)
memcpy((void *)&data, (void *)buffer_u16, 30);
if (sum != data.checksum) {
Serial.println("Checksum failure");
return false;
}
// success!
return true;
}
这是我当前获得的数据的示例
3/24/2019 14:56:49 0 0 0 0
3/24/2019 14:56:50 12 12 1596 470
3/24/2019 14:56:52 12 12 1596 470
3/24/2019 14:56:53 12 12 1596 470
3/24/2019 14:56:54 13 13 1590 463
3/24/2019 14:56:55 13 13 1590 463
3/24/2019 14:56:56 13 13 1590 463
3/24/2019 14:56:57 13 13 1590 463
3/24/2019 14:56:58 13 13 1590 463
3/24/2019 14:56:59 13 13 1590 463
3/24/2019 14:57:00 13 13 1590 463
3/24/2019 14:57:01 13 13 1590 463
3/24/2019 14:57:02 13 13 1590 463
3/24/2019 14:57:03 13 13 1590 463
3/24/2019 14:57:04 13 13 1590 463
3/24/2019 14:57:05 13 13 1590 463
3/24/2019 14:57:06 13 13 1590 463
3/24/2019 14:57:08 13 13 1590 463
3/24/2019 14:57:09 13 13 1590 463
3/24/2019 14:57:10 13 13 1590 463
3/24/2019 14:57:11 13 13 1590 463
3/24/2019 14:57:12 13 13 1590 463
3/24/2019 14:57:13 13 13 1590 463
3/24/2019 14:57:14 13 13 1590 463
3/24/2019 14:57:15 13 13 1590 463
3/24/2019 14:57:16 13 13 1590 463
3/24/2019 14:57:17 13 13 1590 463
3/24/2019 14:57:18 13 13 1590 463
3/24/2019 14:57:19 13 13 1590 463
3/24/2019 14:57:20 13 13 1590 463
3/24/2019 14:57:21 13 13 1590 463
3/24/2019 14:57:22 13 13 1590 463
3/24/2019 14:57:23 13 13 1590 463
3/24/2019 14:57:24 13 13 1590 463
3/24/2019 14:57:25 13 13 1590 463
3/24/2019 14:57:26 13 13 1590 463
3/24/2019 14:57:27 13 13 1590 463
3/24/2019 14:57:28 16962 16962 16962 16962
3/24/2019 14:57:29 16962 16962 16962 16962
3/24/2019 14:57:30 16962 16962 16962 16962
3/24/2019 14:57:32 16962 16962 16962 16962
3/24/2019 14:57:33 16962 16962 16962 16962
3/24/2019 14:57:34 16962 16962 16962 16962
3/24/2019 14:57:35 16962 16962 16962 16962
3/24/2019 14:57:36 16962 16962 16962 16962
3/24/2019 14:57:37 16962 16962 16962 16962
3/24/2019 14:57:38 16962 16962 16962 16962
3/24/2019 14:57:39 16962 16962 16962 16962
3/24/2019 14:57:40 16962 16962 16962 16962
3/24/2019 14:57:41 16962 16962 16962 16962
3/24/2019 14:57:42 16962 16962 16962 16962
3/24/2019 14:57:43 16962 16962 16962 16962
3/24/2019 14:57:44 16962 16962 16962 16962
3/24/2019 14:57:45 16962 16962 16962 16962
3/24/2019 14:57:46 16962 16962 16962 16962
3/24/2019 14:57:47 16962 16962 16962 16962
3/24/2019 14:57:48 16962 16962 16962 16962
3/24/2019 14:57:49 16962 16962 16962 16962
3/24/2019 14:57:50 16962 16962 16962 16962
3/24/2019 14:57:51 16962 16962 16962 16962
3/24/2019 14:57:52 16962 16962 16962 16962
3/24/2019 14:57:53 16962 16962 16962 16962
3/24/2019 14:57:54 16962 16962 16962 16962
3/24/2019 14:57:55 16962 16962 16962 16962
3/24/2019 14:57:56 16962 16962 16962 16962
3/24/2019 14:57:57 16962 16962 16962 16962
3/24/2019 14:57:58 16962 16962 16962 16962
3/24/2019 14:57:59 16962 16962 16962 16962
3/24/2019 14:58:00 16962 16962 16962 16962
3/24/2019 14:58:01 11 12 1614 431
3/24/2019 14:58:03 16962 16962 16962 16962
3/24/2019 14:58:04 16962 16962 16962 16962
3/24/2019 14:58:05 16962 16962 16962 16962
3/24/2019 14:58:06 16962 16962 16962 16962