- Notifications
You must be signed in to change notification settings - Fork1
Air Quality Monitoring Station
License
fu-hsi/AQMS
Folders and files
| Name | Name | Last commit message | Last commit date | |
|---|---|---|---|---|
Repository files navigation
After a long time I decided to share my Personal Weather Station.
It is based on my PMS library (https://github.com/fu-hsi/PMS).
Configuration
Before uploading code, change configuration:
// Don't touch this ;-)// #define FU_PROFILE#ifdef FU_PROFILE#include"Settings.h"#else// Debug (D4)#defineDBG Serial1// Webservicestaticconstchar* WS_UA ="AQMS/2.0";staticconstchar* WS_TOKEN ="YOUR TOKEN";staticconstchar* WS_URL ="YOUR SERVER SCRIPT";// Wireless credentialsstaticconstchar* WL_SSID ="YOUR SSID";staticconstchar* WL_PASS ="YOUR PASSWORD";staticconstuint8_t WL_CHANNEL =0;// OTA credentialsstaticconstchar* BE_USERNAME ="admin";staticconstchar* BE_PASSWORD ="admin";// PMS configuration (INTERVAL & DELAY can't be equal!!!)staticconstuint32_t PMS_READ_INTERVAL =150000;staticconstuint32_t PMS_READ_DELAY =30000;// Takes N samples and counts the averagestaticconstuint8_t PMS_READ_SAMPLES =2;#endif// FU_PROFILE
Board settings
Board identification
If you have any problems, use flashInfo() function to identify board orCheckFlashConfig.ino (it's the same).This is very imporant for OTA update.
Circuit
I don't have necessary components for Fritzing, sorry...
| Component | WeMos | Note |
|---|---|---|
| Debug output | D4 | |
| Battery monitor | A1 | 100k resistor in series (max. 4.2V). |
| PMS7003 | TX => RX RX => TX VCC => 5V GND => GND | Disconnect before programming via a usb port! |
| SHT31-D | SDA => D1 SCL => D2 VCC => 3.3V GND => GND | For temperature and humidity (built-in heater). |
| BME280 | SDA => D1 SCL => D2 VCC => 3.3V GND => GND | For pressure and temperature (temperature and humidity as backup). |
Alternative sensors
I testet many sensors... The following list shows my ranking.
| Rank | Sensor | Note |
|---|---|---|
| 1 | SHT31-D | Temperature, Humidity (built-in heater, Filter Caps are also available). |
| 2 | BMP280 | Temperature, Pressure. |
| 3 | BMP180 | Temperature, Pressure. |
| 4 | BME280 | Temperature, Humidity, Pressure. |
| 5 | DHT22 (AM2302) | Temperature, Humidity. |
Don't use BME280 for measuring temperature... I get readings overstated more than 2°C.
DHT22 is also a bad choice for measuring humidity.
Best combo for me is SHT31-D with BMP280, but BMP280 stopped working properly before publishing this project and I use BME280 now.
- Radiation shield TFA 98.1114.02
- Wemos D1 ESP-WROOM-02
- Plantower PMS7003
- SHT31-D
- BME280
- Pollution
- Temperature and humidity
- Pressure
- Battery voltage
- OTA update over Wi-Fi
- Sending data to the server
- Mobility (Lithium-ion battery)
- Battery monitor
- File logging
Up to8 hours with listed conditions:
- Default configuration
- Li-Ion ~1500mAh
- Temperature ~3°C
In surface mounted S-BOX 116B IP65 (old hardware).
Merged with my previous meteorological station in the radiation shield.
Mounted on the balcony and powered through a thin cable connected to a PC USB.
USB socket in WeMos was removed (accidentally ;-).
Couple pictures from inside.
Table structure
CREATETABLE `weather_pms` (`id`int(10) unsignedNOT NULL AUTO_INCREMENT,`dt`timestampNOT NULL DEFAULTCURRENT_TIMESTAMP,`pm1`smallint(6) DEFAULTNULL,`pm25`smallint(6) DEFAULTNULL,`pm10`smallint(6) DEFAULTNULL,`rv`smallint(6) DEFAULTNULL,`v` float(4,2) DEFAULTNULL,`temperature` float(4,2) DEFAULTNULL,`humidity` float(4,2) DEFAULTNULL,`pressure` float(6,2) DEFAULTNULL,`bm280_temp` float(4,2) DEFAULTNULL,`bm280_hum` float(4,2) DEFAULTNULL,PRIMARY KEY (`id`)) ENGINE=InnoDB AUTO_INCREMENT=146810 DEFAULT CHARSET=utf8;
Sample data
id dt pm1 pm25 pm10 rv v temperature humidity pressure bm280_temp bm280_hum ------ ------------------- ------ ------ ------ ------ ------ ----------- -------- -------- ---------- -----------146810 2018-12-17 22:00:57 22 40 52 1024 4.20 -0.79 95.15 1008.28 -0.26 81.28146809 2018-12-17 21:57:57 26 44 66 1024 4.20 -0.72 94.94 1008.31 -0.17 80.95146808 2018-12-17 21:54:57 22 36 40 1024 4.20 -0.76 94.93 1008.31 -0.28 81.25146807 2018-12-17 21:51:57 18 34 43 1024 4.20 -0.79 95.20 1008.26 -0.17 81.19146806 2018-12-17 21:48:57 16 34 50 1024 4.20 -0.92 95.49 1008.25 -0.35 81.66146805 2018-12-17 21:45:57 22 40 52 1024 4.20 -0.93 95.45 1008.27 -0.41 81.77I have PHP script on my VPS server where I receive POST data.These data are then sent (after some calculations) to:
What calculations do I mean? For example:
- Reduced pressure
- Heat Index
- Dev Point
I also reject the results below a certain voltage.
For simplicity, I share only a basicws.php script. Rest is in your gesture.
<?phperror_reporting(0);ini_set('display_errors',0);date_default_timezone_set('Europe/Warsaw');// define('FU_PROFILE', true);if (defined('FU_PROFILE')) {require_once'config.php';}else {define('WS_TOKEN','YOUR TOKEN');define('DB_HOST','YOUR DB HOST');define('DB_USER','YOUR DB USER');define('DB_PASS','YOUR DB PASS');define('DB_NAME','YOUR DB NAME');}classDB{privatestatic$db =null;privatefunction__construct() {}publicstaticfunctiongetConnection() {if (self::$db ==null) {$dsn =sprintf('mysql:dbname=%s;host=%s',DB_NAME,DB_HOST);$options =array(PDO::MYSQL_ATTR_INIT_COMMAND =>"SET NAMES utf8",PDO::ATTR_ERRMODE =>PDO::ERRMODE_SILENT,PDO::ATTR_DEFAULT_FETCH_MODE =>PDO::FETCH_ASSOC, );self::$db =newPDO($dsn,DB_USER,DB_PASS,$options); }returnself::$db; }}if (!empty($_SERVER['HTTP_X_TOKEN']) &&$_SERVER['HTTP_X_TOKEN'] ==WS_TOKEN) {// Allowed fields$whiteList = ['pm1','pm25','pm10','rv','v','temperature','humidity','pressure','bm280_temp','bm280_hum' ];// Clear array$whiteList =array_fill_keys($whiteList,NULL);// Prepare array$storeData = [];$storeData =array_merge($storeData,$whiteList,array_intersect_key($_POST,$whiteList));try {$db =DB::getConnection();$stm =$db->prepare('INSERT INTO weather_pms SET dt = NOW(),' .implode(',',array_map(function ($key) {return$key .' = :' .$key; },array_keys($storeData))));$stm->execute($storeData); }catch(PDOException$e) {exit('DB error'); }}?>
- Add a GPS module for use in the field (https://github.com/fu-hsi/FuGPS).
UTC time from GPS is an extra bonus for work in offline mode.
About
Air Quality Monitoring Station
Topics
Resources
License
Uh oh!
There was an error while loading.Please reload this page.