darkorigin
发表于 2016-8-27 23:02:31
塑料盒可以用电烙铁直接烫,没有的话 用回形针烧红了烫也可以
比较好的方法是用电磨,挖方孔用刀片,打洞用钻头,挖坑可以用铣头。。。
rockorange
发表于 2016-12-9 21:13:48
请教楼主
if (loopCnt % 40 == 0) {
getDHT22();
}
应该怎么理解摸?
还有,我数据格式报错,请问是什么问题? sketch_dec09c.ino: In function 'int Filter()':
sketch_dec09c.ino:26:16: error: incompatible types in assignment of 'int' to 'int '
sketch_dec09c.ino:32:39: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
sketch_dec09c.ino:33:21: error: invalid conversion from 'int*' to 'int' [-fpermissive]
sketch_dec09c.ino:34:20: error: incompatible types in assignment of 'int' to 'int '
sketch_dec09c.ino:40:48: error: invalid conversion from 'int*' to 'int' [-fpermissive]
编译有误。
第三个问题,怎么能从5秒钟或者10个数后开始显示数据,因为G5可能是里面脏了前几个数据偏大。
jackz2007
发表于 2016-12-21 13:08:01
请教下楼主,在编译时出错,中位值平均滤波那段,filter_buf = filter_buf; 提示“incompatible types in assignment of 'int' to 'int ' ”,怎么改呢?:D
FN2879
发表于 2017-1-11 08:58:59
G5传感器0.3颗粒物有显示吗?
machh03
发表于 2017-3-24 01:23:32
请问下oled的连线方式,谢谢
jasonwang1208
发表于 2017-3-24 10:49:38
3Q for sharing.
wwwyyy317
发表于 2017-4-7 20:06:05
感谢LZ!!!
mega2560+G1+DHT22+LCD12864(接线8,9,3)稍微改了一下代码,一次通过!
滤波那一段代码可以去掉吗?实在是看不大懂
swag王大爷
发表于 2017-12-4 20:20:02
摘取了你的G5程序,但是串口监视器那什么都没有,因为我的传感器是一个原来的学长留下来的,所以没有例程,只能借用你的了,帮忙看看程序哪错了,谢谢。
#include <SoftwareSerial.h>
SoftwareSerial mySerial(9, 10);
struct PARAMS {
float T;//显示温度
float H;//显示湿度
long P;//显示PM2.5
long _P;//读取PM2.5
} _params;
//G5 相关变量
static unsigned char ucRxBuffer;
static unsigned char ucRxCnt = 0;
//循环计数器
unsigned char loopCnt = 0;
void setup() {
Serial.begin(9600);
//软串口读取G5
mySerial.begin(9600);
delay(500);
}
//获取PM2.5的值
void getPM25(unsigned char ucData) {
ucRxBuffer = ucData;
if (ucRxBuffer != 0x42 && ucRxBuffer != 0x4D){
ucRxCnt = 0;
}
if (ucRxCnt > 31) {
_params._P = (float)ucRxBuffer * 256 + (float)ucRxBuffer; //美国标准
// _params._P = (float)ucRxBuffer * 256 + (float)ucRxBuffer; //中国标准
ucRxCnt = 0;
}
}
//中位值平均滤波,处理PM2.5的值
#define FILTER_N 5
int Filter() {
int i;
int filter_sum = 0;
int filter_max, filter_min;
int filter_buf;
for (i = 0; i < FILTER_N; i++) {
filter_buf = _params._P;
delay(1);
}
filter_max = filter_buf;
filter_min = filter_buf;
filter_sum = filter_buf;
for (i = FILTER_N - 1; i > 0; i--) {
if (filter_buf > filter_max)
filter_max = filter_buf;
else if (filter_buf < filter_min)
filter_min = filter_buf;
filter_sum = filter_sum + filter_buf;
filter_buf = filter_buf;
}
i = FILTER_N - 2;
filter_sum = filter_sum - filter_max - filter_min + i / 2; // +i/2 的目的是为了四舍五入
filter_sum = filter_sum / i;
return filter_sum;
}
void loop() {
while (mySerial.available()) {
getPM25(mySerial.read());
}
_params.P = Filter();
}