Reddit mentions of Elitech RC-5 USB Temperature Data Logger Recorder 32000 Points High Accuracy

Sure, I have my own IoT temperature sensors publishing data using an ESP8266. I also made one with an Arduino Pro Mini, micro SD card module, and a real time clock module. I like the HTU21D - you can get clones on ebay for cheap, and they're about $15 from Sparkfun. They're very accurate. You can also buy an Arduino Uno and a data logging shield (with SD card and RTC built in) to reduce the soldering needed.

But your landlord might not know what to make of a homemade temperature logger. Honestly, there are already commercial products that do this pretty cheaply.

It's a fun project, but it might not be the right solution to your problem.

I would think that anything non manual is going to be expensive unless you build it yourself. You'd need multiple temperature probes, some sort of communication between the readings and a datalogger. Using a computer would simplify things, but you'd be doing at least some low level programming, and measuring multiple points without having wires running all over your house means communication, which means power sources and other complications.

If you're not against crunching a little data yourself, just compiling some spreadsheets together, then I'd grab some simple temperature data loggers. Here's a temp only for super cheap:

https://www.amazon.com/Elitech-RC-5-Temperature-Recorder-Accuracy/dp/B00MQSCZF2/ref=pd_sim_328_2?_encoding=UTF8&pd_rd_i=B00MQSCZF2&pd_rd_r=3NFG19818199WDFMJ0JS&pd_rd_w=Ng9gF&pd_rd_wg=QW5Zl&psc=1&refRID=3NFG19818199WDFMJ0JS

And here's temp an humidity. Not terribly expensive, but adds up a bit for four. Still, I doubt you'll get much cheaper (providing you can get them in EU for similar price):

https://www.amazon.com/dp/B01H3669T4?psc=1

USB temperature logger:

http://www.amazon.com/Elitech-RC-5-Accuracy-Temperature-recorder/dp/B00MQSCZF2/ref=pd_sim_328_4?ie=UTF8&dpID=41z0hYchsUL&dpSrc=sims&preST=_AC_UL160_SR160%2C160_&refRID=0RZE5G0XE7WRTH4627J5

http://www.ebay.com/itm/USB-Temperature-LCD-Data-Logger-Datalogger-RC-5-Temp-Recorder-Internal-Sensor-/251862739086

Or temp/humidity monitor if you only want to check min max:

http://www.amazon.com/gp/product/B0013BKDO8?psc=1&redirect=true&ref_=oh_aui_detailpage_o08_s00

Last week I found an older post of yours that got me thinking about temperature data loggers. Of course I wanted to see how cheap of devices there are out there. I found this which is kind of cool since there is a display, it's a recorder but no Bluetooth. Elitech RC-5 USB Temperature Data logger Recorder 32000 Points High Accuracy https://www.amazon.com/dp/B00MQSCZF2/ref=cm_sw_r_cp_apa_Jri.BbZGVRK0S.

I like that watch that was posted in this thread, I wonder if there is an affordable watch that has temperature and compass features and also records data over time?

https://www.amazon.com/Elitech-RC-5-Temperature-Recorder-Accuracy/dp/B00MQSCZF2/ref=sr_1_3?ie=UTF8&qid=1497552201&sr=8-3&keywords=temperature+logger

hmm this seems like an OK low tech solution, thank you!!

I just wanted to rig my house, wasn't looking for like a hobbyist build-your-solution-from-assembly-language-and-pins solution.