Hello
I'm looking to use 1-wire for temperature sensors as the first step of an HA project (see earlier).
I have a solar cylinder with pockets for temperature measurement which extend about 10-15cm into the cylinder. Any sensors will have to fit alongside the boiler controls (e.g. one is a sensor probe, a bit like Ruggedised Temperature Probe).
So as a first step I'm looking for 1-wire temperature sensors that can be installed in the top, middle and bottom pockets of the cylinder. These pockets are sealed on the outside (with some kind of rubber bung) and could reach up to 90C.
So, my initial questions are:
1) Who are people's favourite 1-wire suppliers in the UK? There's a thread here but it's quite old now. I'll need a retail suppliers, not trade account only.
2) What is the most suitable temp sensor for this use? The ruggedised probe above is £28 each so not really viable - can I make some sort of cover/sleeve for a DS18*20? I suppose if they need replacing periodically that wouldn't be a problem if they were relatively cheap.
As for control etc that will have to wait for another day (week/month!) - the main thing is to get the sensors installed along with the cylinder (the week after next). Of course ideally I'd like to be able to test them so have considered one of those 1-wire to USB interfaces. Ultimately I think I'm aiming to get 1-wire -> (Ethernet e.g. opn-one) xAP -> O2 Joggler but that seems a long way off at the moment.
Any advice or pitfalls (1-wire layout looks like a common one) would be most welcome!
Simon
I'm looking to use 1-wire for temperature sensors as the first step of an HA project (see earlier).
I have a solar cylinder with pockets for temperature measurement which extend about 10-15cm into the cylinder. Any sensors will have to fit alongside the boiler controls (e.g. one is a sensor probe, a bit like Ruggedised Temperature Probe).
So as a first step I'm looking for 1-wire temperature sensors that can be installed in the top, middle and bottom pockets of the cylinder. These pockets are sealed on the outside (with some kind of rubber bung) and could reach up to 90C.
So, my initial questions are:
1) Who are people's favourite 1-wire suppliers in the UK? There's a thread here but it's quite old now. I'll need a retail suppliers, not trade account only.
2) What is the most suitable temp sensor for this use? The ruggedised probe above is £28 each so not really viable - can I make some sort of cover/sleeve for a DS18*20? I suppose if they need replacing periodically that wouldn't be a problem if they were relatively cheap.
As for control etc that will have to wait for another day (week/month!) - the main thing is to get the sensors installed along with the cylinder (the week after next). Of course ideally I'd like to be able to test them so have considered one of those 1-wire to USB interfaces. Ultimately I think I'm aiming to get 1-wire -> (Ethernet e.g. opn-one) xAP -> O2 Joggler but that seems a long way off at the moment.
Any advice or pitfalls (1-wire layout looks like a common one) would be most welcome!
Simon
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