Wednesday, August 29, 2007
Botanicalls
A soil moisture sensor in each plant sends information to an Arduino board which then passes the information to a ZigBee network. An XPort is used to send data via PHP to a mySQL database and to Asterisk, which drives the phone calls.
The code on the chip averages the data and makes decisions about when a phone call request should be sent. There are set thresholds, unique to each plant, for minimum and maximum soil moisture.
The moisture sensor circuit is based on Forrest Mims. Read more here.
Labels: agriculture, asterisk, sensors, wireless Links to this post
Posted by Kevin Walker at 8/29/2007 11:40:00 PM 0 comments
Tuesday, May 01, 2007
Asterisk VOIP gateway
Asterisk is an open source telephony system. It can be installed on any server, take incoming calls and do various things with them, such as route them internationally via VOIP, record audio, perform messaging functions, and interface with web servers.
Here is an asterisk to skype gateway. This means that phone calls made to the asterisk server can be routed internationally via skype. Conversely, contact with the server via skype could be routed to local phones.
Here is a method of podcasting vis Asterisk. Audio podcasts can be recorded by making a phone call, or by uploading files. They can be listened to by making a phone call, or by accessing audio files on the server.
Labels: asterisk, mobilephone, podcast, skype, SMS, web, wireless Links to this post
Posted by Kevin Walker at 5/01/2007 12:20:00 PM 0 comments