Weather Board For The Raspberry Pi / Arduino – Grove
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Note: Another name for the Weather Board is the WeatherPiArduino V3. This is a replacement board for the WeatherPiArduino Board V1 and V2. The WeatherPiArduino Version 1 product page is here and the WeatherPiArduino Version 2 product page is here.
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Want to build a Weather Station with the board?
The Weather Board for the Raspberry Pi / Arduino is now available and in stock!
WeatherRack Weather Sensors now available.
Outdoor Temperature and Humidity Sensors now available.
The Weather Board is a weather station controller board designed to interface to Arduino and Raspberry Pi computers. It is an interface board developed by SwitchDoc Labs to allow the user to easily build a fully functioned Weather Station while allowing customization of functions.
The Weather Board is derived from Project Curacao and the WeatherPiArduino. Generation 1 of this board was deployed and tested in Curacao before Generation 2 was released to production. The full WeatherPiArduino article was published in Raspberry Pi Geek magazine in September, 2014 and a follow up article has been published in April, 2015 (including the new lightning detector). The Weather Board comes with a SwitchDoc Labs DS3231/EEPROM board.
Combine the Weather Board with a SunAir or SunAirPlus board to create a solar powered weather station.
Downloads for the Weather Board
New! The new Weather Board software auto detects your weather devices and can be configured for the MOD-1016G Lightning Detector and SunAirPlus for Solar Power.
Arduino Software is here.
Arduino Software for the WeatherRack and the Weather Board is here.
Raspberry Pi Software is here.
WeatherRack Software can be found here.
You can download the Full Weather Board Specification here . The specification contains wiring lists for connecting the Weather Board to the Raspberry Pi and the Arduino family of products.
What are Grove Connectors?
Grove connectors are standardized plugs for connecting devices together easily and without soldering. See our Full Grove Tutorial here.
Grove Connectors
Startup of Raspberry Pi Test Software
pi@RPIZero:~/SDL_Pi_WeatherBoard $ vi WeatherBoard.py AM2315 = 28.1000003815 Weather Board Demo / Test Version 1.6 - SwitchDoc Labs Program Started at:2016-07-24 22:29:47 ---------------------- DS3231: Present BMP280: Present FRAM: Not Present HTU21DF: Present AM2315: Present ADS1015: Not Present ADS1115: Present AS3935: Present OLED: Present SunAirPlus: Present ---------------------- switch to Bus0 ---------------------------------------- ----------------- DS3231 Real Time Clock ----------------- Raspberry Pi= 2016-07-24 22:29:47 DS3231= 2016-07-24 22:29:47 DS3231 Temperature= 29.25 C ----------------- ----------------- WeatherRack Weather Sensors ----------------- Rain Total= 0.00 in Wind Speed= 0.00 MPH MPH wind_gust= 0.00 MPH Wind Direction= 270.00 Degrees Wind Direction Voltage= 4.472 V ----------------- ----------------- BMP280 Barometer ----------------- Temperature = 29.48 C Pressure = 94.49 KPa Altitude = 584.90 m Sealevel Pressure = 94.49 KPa ----------------- ----------------- AM2315 Temperature/Humidity Sensor ----------------- AM2315 temperature: 28.2 AM2315 humidity: 31.2 AM2315 crc: 1 ----------------- ----------------- HTU21DF Temp/Hum ----------------- Temperature = 28.40 C Humidity = 36.70 % ----------------- ----------------- AS3935 Lightning Detector ----------------- Last result from AS3935: ----No Lightning detected--- Lightning Count = 0 ----------------- ----------------- FRAM Not Present ----------------- ----------------- ----------------- SunAirPlus Present ----------------- LIPO_Battery Bus Voltage: 4.18 V LIPO_Battery Shunt Voltage: 0.64 mV LIPO_Battery Load Voltage: 4.18 V LIPO_Battery Current 1: 6.40 mA Solar Cell Bus Voltage 2: 3.08 V Solar Cell Shunt Voltage 2: 0.00 mV Solar Cell Load Voltage 2: 3.08 V Solar Cell Current 2: -0.00 mA Output Bus Voltage 3: 4.98 V Output Shunt Voltage 3: 22.44 mV Output Load Voltage 3: 5.01 V Output Current 3: 224.40 mA Sleeping 10 seconds
Specification
You can download the Full Weather Board Specification here . The specification contains wiring lists for connecting the Weather Board to the Raspberry Pi and the Arduino family of products.
Block Diagram
It was specifically designed to interface with the SwitchDoc WeatherRack, ArgentData Weather Sensors, SparkFun Weather Meters SEN-08942 along with auxiliary I2C units.
Interfaces on Weather Board
- I2C for Raspberry Pi and Arduino (Board works at 3.3V and 5V)
- RJ11 Plugs installed for SwitchDoc Labs WeatherRack, etc.
- Wind Vane, Rain Bucket, Anemometer computer connections for Raspberry Pi and Arduino
- Grove Connections for all interfaces
I2C devices Included with the Weather Board
Plug in I2C Interfaces provided
- Embedded Adventures I2C Lightning Detector MOD-1016 board
- Adafruit HTU21D-F Temperature/Humidity breakout board
- Adafruit 32KB FRAM I2C breakout board
- Adafruit ADS1015 4 Channel A/D I2C board
I2C Device Specifications
BMP280 (Barometer / Temperature)
AS3935 (MOD-1016 – Lightning Detector)
FRAM (32KB Fast Non-Volatile Storage)
Want to build a control panel for the Weather Board? Look at this post and the picture below:
The SDL_Weather_80422 class library is designed to provide all the functions of the SwitchDoc WeatherRack, ArgentData Weather Sensors, SparkFun Weather Meters SEN-08942 in one C++ class.
The library is easy to use and hides the complexity of the interface to the sensors. The C++ class has two Interrupt Service Routines (ISR), one each for the anemometer and the rain bucket. The wind vane is connected to an Analog to Digital Converter (ADC) input pin on the Arduino. Note that the C++ class is designed to be a singleton, in other words, you only can interface one sensor package without some additional work (mostly involving Interrupts). The article in Raspberry Pi Geek magazine discusses this in detail.
There are two main modes for the class.
SDL_MODE_SAMPLE
SDL_MODE_SAMPLE mode means return immediately after asking for the wind speed. The wind speed is averaged at sampleTime or since you last asked, whichever is longer. If the sample time has not passed since the last call, the class returns the last calculated wind speed. That means that you will never see changes faster than the specified sample time. This allows you to not wait for the wind speed, you can just grab the last valid reading.
SDL_MODE_DELAY
SDL_MODE_DELAY mode means to wait for the set sample time to expire and return the average wind speed at the expiration. You would use this if you want to make sure you have the latest value and your program architecture allows you to pause for the sample time before continuing. Which mode you use depends on the specific software architecture of your Arduino application.
Typically, I use SDL_MODE_SAMPLE because I can tolerate not having a current value of wind speed.
The example code for the SDL_Weather_80422 library is shown below:
/*
SDL_Weather_80422_Library.ino - Example for using SDL_Weather_80422 Library
For SwitchDoc Labs WeatherRack
Weather Sensor Assembly 80422 Argent Data Systems
SparkFun
Created by SwitchDoc Labs July 27, 2014.
Released into the public domain.
*/
#include
#include
#include "SDL_Weather_80422.h"
#define pinLED 13 // LED connected to digital pin 13
#define pinAnem 18 // Anenometer connected to pin 18 - Int 5
#define pinRain 2
#define intAnem 5
#define intRain 0
// for mega, have to use Port B - only Port B works.
/*
Arduino Pins PORT
------------ ----
Digital 0-7 D
Digital 8-13 B
Analog 0-5 C
*/
// initialize SDL_Weather_80422 library
SDL_Weather_80422 weatherStation(pinAnem, pinRain, intAnem, intRain, A0, SDL_MODE_INTERNAL_AD);
uint8_t i;
float currentWindSpeed;
float currentWindGust;
float totalRain;
void setup()
{
Serial.begin(57600);
Serial.println("-----------");
Serial.println("WeatherPiArduino SDL_Weather_80422 Class Test");
Serial.println("Version 1.0");
Serial.println("-----------");
weatherStation.setWindMode(SDL_MODE_SAMPLE, 5.0);
//weatherStation.setWindMode(SDL_MODE_DELAY, 5.0);
totalRain = 0.0;
}
void loop()
{
Serial.println("----------------");
currentWindSpeed = weatherStation.current_wind_speed()/1.6;
currentWindGust = weatherStation.get_wind_gust()/1.6;
totalRain = totalRain + weatherStation.get_current_rain_total()/25.4;
Serial.print("rain_total=");
Serial.print(totalRain);
Serial.print(""" wind_speed=");
Serial.print(currentWindSpeed);
Serial.print("MPH wind_gust=");
Serial.print(currentWindGust);
Serial.print("MPH wind_direction=");
Serial.println(weatherStation.current_wind_direction());
delay(1000);
}
When you run this, you should get a result similar to this:
----------- WeatherArduino SDL_Weather_80422 Class Test Version 1.0 ----------- ---------------- rain_total=0.00 wind_speed=13.20MPH wind_gust=12.40MPH wind_direction=90.00 ---------------- rain_total=0.00 wind_speed=9.60MPH wind_gust=9.48MPH wind_direction=90.00 ---------------- rain_total=0.00 wind_speed=10.20MPH wind_gust=9.23MPH wind_direction=90.00 ---------------- rain_total=0.00 wind_speed=11.10MPH wind_gust=9.84MPH wind_direction=90.00