31–40 of 232 posts
The legit Hackrf One is known to have frequency smearing, I wouldn’t use one off Aliexpress to transmit without testing it with a spectrum analyzer first (which you probably don’t have if you are buying knockoffs from Aliexpress).
One doesn’t actually need any extra hardware for this… just 8cm of wire and this https://github.com/F5OEO/rpitx (use at your own risk of course)
From the linked repo: > rpitx is a general radio frequency transmitter for Raspberry Pi which doesn't require any other hardware unless filter to avoid intererence. It can handle frequencies from 5 KHz up to 1500 MHz. Wait, how does that work? 1.5GHz is a _lot_, I can't imagine this is done with bit-banging an I/O line, nor do I expect the Pi will have a DAC with anything close to a 3GHz+ sample rate. > Plug a wire o…
Funny how the manufacturer proudly claims that the protocol is encrypted, but completely forget to mitigate replay attacks,thus making the encryption completely useless
Which raises the question whether the OP now unknowingly also controls the heater in the apartment next to his...
Speaking of newish natural gas (CH4) heaters, they all should have modulating thermostat capability with OpenTherm/eBus or other protocol. Combined with a thermostat with outdoor temperature sensor system efficiency is increased a few percent and that should help offset thermostat and installation costs. In the end you have more efficient modern heating system.
Same should apply for heat pump systems.
Funny how the manufacturer proudly claims that the protocol is encrypted, but completely forget to mitigate replay attacks,thus making the encryption completely useless
I wonder what the ideal one-size fits all thermostat looks like. The one in my apartment has a “feature” a lot of US thermostats now have, where you set four ordered times called wake, leave, return, and sleep and the temperature you want the space in each interval. I know very few people who actually live in a household where everyone wakes, leaves, returns, and sleeps on the same schedule every day. I work from hom…
Nope! The smart learning feature was the biggest pain in the ass. You’d be sleeping during the day for a night shift, only to find yourself freezing because it decided no one was home.
Cool project. Speaking of newish natural gas (CH4) heaters, they all should have modulating thermostat capability with OpenTherm/eBus or other protocol. Combined with a thermostat with outdoor temperature sensor system efficiency is increased a few percent and that should help offset thermostat and installation costs. In the end you have more efficient modern heating system. Same should apply for heat pump systems.
I wonder what the ideal one-size fits all thermostat looks like. The one in my apartment has a “feature” a lot of US thermostats now have, where you set four ordered times called wake, leave, return, and sleep and the temperature you want the space in each interval. I know very few people who actually live in a household where everyone wakes, leaves, returns, and sleeps on the same schedule every day. I work from hom…
Anyway, my ideal setup would be to install 'smart' thermostat taps on every radiator in the house, either manually turn them down when you're not in the room or have them automatically detect activity or open windows and adjust accordingly. But each one has the authority to trigger the central boiler if needs be, instead of only the master thermostat in the living room.
I wonder what the ideal one-size fits all thermostat looks like. The one in my apartment has a “feature” a lot of US thermostats now have, where you set four ordered times called wake, leave, return, and sleep and the temperature you want the space in each interval. I know very few people who actually live in a household where everyone wakes, leaves, returns, and sleeps on the same schedule every day. I work from hom…
I'm still of the opinion that a dial works best. Especially in modern homes (in Europe at least), there seems to be a school of thought that you should just leave your thermostat at the same temperature at all times - the theory being that warming up a cold house in the morning costs more energy than maintaining a stable temperature. Anyway, my ideal setup would be to install 'smart' thermostat taps on every radiator…
Regarding "what is better" from energy efficiency, I would prefer a system that "check it" because my guess is that it depends a lot based on the individual situation. I mean everybody is going crazy over "IA" but a couple of sensors and a system smart enough to adjust your usage based on your particular situation and preferences (like "eco", etc.) is an exception.
Earlier quoted context omitted.
I'm still of the opinion that a dial works best. Especially in modern homes (in Europe at least), there seems to be a school of thought that you should just leave your thermostat at the same temperature at all times - the theory being that warming up a cold house in the morning costs more energy than maintaining a stable temperature. Anyway, my ideal setup would be to install 'smart' thermostat taps on every radiator…
I think in real life there are more constraints. For example there are people that sleep better at a lower temperature than the daily one (so leaving the thermostat at the same temperature it's a minus for them). Regarding "what is better" from energy efficiency, I would prefer a system that "check it" because my guess is that it depends a lot based on the individual situation. I mean everybody is going crazy over "I…
But of course, not really feasible in Atlanta or Phoenix. Nighttime temps are too warm.