Energy expert Paul Scheckel and Kevin discussed ways to monitor energy usage around the house. The whole-house electrical monitoring system that uses the internet to provide a "dashboard" showing electrical usage is manufactured by: eMonitor by PowerHouse Dynamics
617-454-1011

• OpenBTS is a software-based GSM access point, allowing standard GSM-compatible mobile phones to make telephone calls without using existing telecommunication providers' networks. OpenBTS is notable for being the first free software implementation of the industry-standard GSM protocol stack.
• The GSM Software Project: We want to bring together all the folks that are interested in building a gsm receiver.

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* is Unix

Jacob Kaplan-Moss

October 7, 2009

• via http://docs.google.com/View?id=ddjmqgw3_43gm6gvggf
• http://www.google.com/#hl=en&source=hp&q=pid+kalman&aq=f&aqi=&oq=&fp=7d15299a959dbb33

Roll Rate

File: In sw/airborne/fw_h_ctl.c we define the roll rate loop:

float cmd = throttle_dep_pgain * ( err + h_ctl_roll_rate_igain * roll_rate_sum_err / H_CTL_ROLL_RATE_SUM_NB_SAMPLES + h_ctl_roll_rate_dgain * d_err);

Note that the roll Pgain is variable with throttle and multiplies through the entire equation affecting the I and D terms as well for ease of tuning.

Are there yet ZigBee products on the market?

Yes, there are. Some implement an actual ZigBee stack while others feature a ZigBee ready platform like EmberNet.

Examples in the residential space include Control4 (lighting), Eaton (home automation), Golden Power Manufacturing (sprinklers and thermostats), Hawking Technology (home gateways), Kalirel (heating), Mija (fire extinguishers), Nice (shutters), and TSC Systems (home automation).

Examples in the commercial space include Mija (fire extinguishers), Philips (lighting), Siemens (building automation), and TAC (building automation).