Hi Folks,
I've had my Ocelot and a bunch of SECU-16I's working well monitoring all the doors and windows in my home but I want to add temperature monitoring to the system.
I've run 4c22 telephone wire to each room for future motions sensors so I'm pre-wired for a number of options:
1) Buy a 1-wire interface, sensors and a plug-in to build a new network.
Star network (each sensor on own leg, ~50' max/leg)
Cost will be a few $100's of dollars if I need hub's.
2) I already have a small bag of Microchip MCP9700 analog temperature
sensors in a TO-92 package so I could wire them up and connect them
as analog inputs to my Ocelot and calculate the voltage from the reading.
I'm not sure it will be as accurate/reliable as I would like. The sensors
output 10mV/degree C and the SECU-16I inputs are sampled at 8-bit
resolution from 0-5V (~20mV resolution). It sounds like this approach
is a non-starter without amplification since the SECU-16I sampling
resolution is 1/2 the sensor resolution but I thought I'd ask the community
what they thought.
Has anyone used the Ocelot in this manner?
If I have to add amplification to get a usable signal then I might as well go with 1-wire.
Thoughts?
I've had my Ocelot and a bunch of SECU-16I's working well monitoring all the doors and windows in my home but I want to add temperature monitoring to the system.
I've run 4c22 telephone wire to each room for future motions sensors so I'm pre-wired for a number of options:
1) Buy a 1-wire interface, sensors and a plug-in to build a new network.
Star network (each sensor on own leg, ~50' max/leg)
Cost will be a few $100's of dollars if I need hub's.
2) I already have a small bag of Microchip MCP9700 analog temperature
sensors in a TO-92 package so I could wire them up and connect them
as analog inputs to my Ocelot and calculate the voltage from the reading.
I'm not sure it will be as accurate/reliable as I would like. The sensors
output 10mV/degree C and the SECU-16I inputs are sampled at 8-bit
resolution from 0-5V (~20mV resolution). It sounds like this approach
is a non-starter without amplification since the SECU-16I sampling
resolution is 1/2 the sensor resolution but I thought I'd ask the community
what they thought.
Has anyone used the Ocelot in this manner?
If I have to add amplification to get a usable signal then I might as well go with 1-wire.
Thoughts?
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