文件列表:

Makefile (225, 2019-11-24)
static (0, 2019-11-24)
static\js (0, 2019-11-24)
static\js\Chart.min.js (50937, 2019-11-24)
templates (0, 2019-11-24)
templates\home.jinja2 (5554, 2019-11-24)
templates\layout.jinja2 (1340, 2019-11-24)
weather.py (4351, 2019-11-24)
weathermon.c (3843, 2019-11-24)
weathermon.h (230, 2019-11-24)

# weathermon Raspberry Pi-based weather monitor for [Ambient Weather F007-TH][] sensors. Listens to RF signals from the F007-TH sensors using a [434MHz reciever][], tracks weather data, and serves a weather site written in [Flask][]. Also sold as TFA sensor 30.3208.02. [Ambient Weather F007-TH]: http://www.ambientweather.com/amf007th.html [434Mhz reciever]: https://www.sparkfun.com/products/10532 [Flask]: http://flask.pocoo.org ### F007-TH Data Encoding Format * RF communication at 434MHz * Uses Manchester Encoding ( '1' represented by high --> low transition) * bit time = 1ms * 195 bit frame, 65 bit packet repeated 3 times * frames sent every ~1 min (varies by channel) * Map of channel id to transmission interval: {1: 53s, 2: 57s, 3: 59s, 4: 61s, 5: 67s, 6: 71s, 7: 73s, 8: 79s} * Source: [github.com/gr-ambient](https://github.com/volgy/gr-ambient/blob/master/docs/notes.txt) * Packet Format * header: all 1s, with final 01 before data starts * 8 bit sensor ID: F007th = Ox45 * 8 bit random ID: resets each time the battery is changed * 1 bit low battery indicator: 1 ==> low battery * 3 bit channel number: channel 1-8 represented as binary 0-7, selectable on F007th unit using dip switches on back * 12 bit temperature data: * To Farenheit: subtract 400 and divide by 10 e.g. 010001001011 => 1099, (1099-400) / 10 = 69.9F * To Celsius: subtract 720 and multiply by 0.0556 e.g. (1099 - 720) * 0.0556 = 21.1C * 8 bit humidity data: relative humidity as integer * 8 bit checksum: [cracked by Ron (BaronVonSchnowzer on Arduino forum)](https://eclecticmusingsofachaoticmind.wordpress.com/2015/01/21/home-automation-temperature-sensors/) * padding: some 0s to fill out packet **Sample Data:** ``` 0 1 2 3 4 5 6 7 FD 45 4F 04 4B 0B 52 0 0 1 2 3 4 5 6 7 8 9 A B C D E 11111101 01000101 01001111 00000100 01001011 00001011 01010010 0000 header sensorid randomid BCh#temp_perature humidity checksum xxxx ^ battery, channel number ``` Translates to: Channel 1 F007th sensor displaying 21.1 Centigrade and 11% RH

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