Remote temperature sensors

Hi Folks,

I love that I can easily see the current state of things and go back through their history really easily with home assistant. Temperatures round the house and outside being very good examples that I use a lot both in dashboards and automations.

What I would like is to be able to do the same but on an adhoc basis remotely. Something like either:

  1. a portable (small!) temperature logger that I can take with me when I am away camping and then it automatically uploads its data to home assistant when I get home
  2. a portable device that can log live back to home assistant either with its own cellular connection or via being paired to a mobile phone.

Anyone aware of such things existing?

Thanks

J