Could someone point me at a demo/resource that does (or gives me a good start) this:
Remote temperature sensor(s) that will store data on a sd card then upload on demand by wifi data that can by used in a spreadsheet.
I want to record data, upload once a day, use in spreadsheet.
I’ve done a search on this and there is quite a few temperature sensor demos/examples, so many thats its not possible for me to choose one to focus on ? I just dont have the knowledge to know whats a good one to use.
Thanks for any help you can give
Well, I guess you are left with taking up somebody else's biased opinion, but you need to consider your environment. I submit the DS18B20 is hard to beat in the range -10 > 85C. It is cheap reliable, very popular and well-supported round here.
You need to be more forthcoming about what you mean by remote, and sensors, how you envisage the setup with the SD, etc.
If you use WiFi, you may find that the ESP8266 WiFi module can do what you want without using Arduino. You might also consider bluetooth. I send continuous data stream to Bluetooth, and also back up to SD. The same bluetooth can be used to download from SD at leisure.
Thanks for the reply is pretty much what i hopped for, a pointer to actual working demo would be good but your info gives me a start, gives me two units to look at. Didn't want to waist time starting on dead ends.
A bit more info - I'm wanting
A small stand alone battery powered unit that will.
Monitor the temperature in my garden, record that data in a sd card, upload on request once a day? will also need to wipe the sent data off the sd card and store new data.
I'm not wanting to use the info for anything like turning anything on/off.
WiFi or Bluetooth ? whatever I'll find the easiest to implement, what Bluetooth module do you use
Just had a FB arduino group temperature Bluetooth thing show, quite opportune
'ESP8266 WiFi module can do what you want without using Arduino' i shall look into it and hope it doesn't push me into 'my head hurts' territory
IGraham:
A small stand alone battery powered unit that will.
Monitor the temperature in my garden, record that data in a sd card, upload on request once a day?
Battery power is a science in itself. You might find it easier to to develop things on a mains-powered setup with a Uno or w.h.y., and then get deep and meaningful about sleep modes and low power operation later. This may entail using a postage stamp Arduino like the Pro Mini, but they are only two or three dollars.
will also need to wipe the sent data off the sd card and store new data.
I bet you don't. If it actually takes five years before you really need to wipe anything, remember where you heard it first.
WiFi or Bluetooth ? whatever I'll find the easiest to implement, what Bluetooth module do you use
I just use a plain-vanilla HC-06 bluetooth - $3-50. I can monitor live events or download accumulated data. This is with just one mains-powered Arduino, all its sensors are cable-connected. As I said, you need to define "remote". In my case "remote" means simply standing nearby and getting it all on the phone. The downloads can be transferred to PC later.
'ESP8266 WiFi module can do what you want without using Arduino' i shall look into it and hope it doesn't push me into 'my head hurts' territory
I only mention this because, by "remote", you may mean really remote, and your sensors are really remote from each other. The thing about the ESP8266 is that it has some Arduino-like capability and can handle DS18B20s without requiring any additional hardware. They are also dirt cheap - cheaper than long cables, but you still have to power them.
odd how the occasional forum notification reply email decides to go missing
thanks for the (more) info, i was aware (to an extent) that power supply issues might be a problem. Possibly/probably the garden greenhouse can supply the needed mains supply, will cut down some of the 'remote' freedom, but you cant have everything.
I'll be head scratching for a good while before i start putting this one together - savor the journey