Simple Arduino Sensors Proxy - aka sasp
The goal of this project is to decode values transmitted by Oregon Scientific weather sensors and send them over internet. You can check out a demo that is using my home weather station here.
Arduino side
Hardware:
- Arduino Uno (~22€)
- Ethernet shield (~34€)
- 434MHz receiver (RLP 434A) but Sparkfun got a cheaper one (~4€)
- Some leds and resistors
- A MPL115A2 (I2C Barometer) (~9€) [Added on 2011-11-11, optional]
Note: it's cheaper to use all-in-one board like the Ethernet Pro board.
Photos
Software:
- Code is heavily based on Weather Station Data Logger project
- Messages are sent over serial and ethernet
- Static ip are used (for source and server) until next arduino release that will enable native dhcp and dns support
- Data are sent using a simple HTTP/GET over TCP
- Arduino decodes RF and sends messages, no filterting are done in place
- Main is an active loop but I'm working on sleep mode to reduce the power consumption
- Source code will be released under LGPL when the dns/dhcp/sleep support is finished
timestamp-type-data
For example:
1732994-OS2-1D202692151089C7424
1798636-OS2-9CC313B0722005474C2
1851937-OS2-8CE313B3326502728611F17DD
1896814-OS2-1D202692051089C6445
1904648-OS2-DCC313B07220054B495
1978824-OS2-1D202692051089C6445
1978944-SA1-0201011002F103
Server side
Features:
- Designed for Google App Engine (gae)
- Simple sensor topology: Site > Locations > Sensors > Raw / Hourly / Daily values
- Raw data can be downsampled to reduce datastore usage
- Daily and hourly stats are periodically saved to stay in the gae free quotas
- Auto learn new sensors or rolling code updates
- Support Temperature, Humidity and UV Index sensors (see supported sensor list)
- Dashboard page with last value, last 24h stats, slope and links to charts page
- Charts page with last 24 (best resolution), last 7 days, last 30 days and current year
- Gauges page for fast overview
- Mobile version
- Heavy use of memcache to speedup page load and reduce gae ressource usage
- Source code will be released under LGPL when a stable version is ready
Supported sensors
- THGR122NX (0x1D20)
- THGN801 (0xF824)
- THGR810 (0xF8B4)
- THWR800 (0xC844)
- UVR128 (0xEC70)
- MPL115A2 (I2C custom SA1 protocol)
Screenshots
Third parties:
- bottle (web framework)
- jinja2 (template engine)
- jquery
- zepto for mobile pages (js micro framework)
- Google Chart Tools / Google Visualization
- dygraphs JavaScript Visualization Library