Temperature Senors - indoor, roof space & external

Hi,

I am looking to add a temperature sensors in every room of my house, plus some external sensors outdoors and in the roof space.

Indoor sensors is there really much difference between all the brands? i current have few SONOFF SNZB-02D and Ikea VINDSTYRKA, however i am wanting to move to no display, zigbee + battery powered. so looking to just get SONOFF SNZB-02P however before i pull the pin i just want to make sure i am not missing anything in terms on accuracy and quality on the sensors?

For roof space, i am thinking best options will be esp32 with POE + I/O Multiplexers + BME280 (or similar); the conditions in the roof space is very dusty so i might need to look at the impact that has on the chosen temp sensor.

For external i really haven’t found much that is reasonable price and IP65+ rated, any recommendation? or am i better of going down the esp32 route as well.

thanks

I have a SNZB-02P currently installed to monitor my bedroom temp and humidly levels and its been on the same battery its come with almost a full year now with it still showing 100%.

From what I can see in the logs it fires off a check in event every 1hr.

Its been pretty accurate thus far vs my airgradient one that I use in the center of the home and the switchbot hub2 I use in the bathroom.

As for crawlspace and POE capable you could look into say this one:

and just use an adapter like this to power it via POE to USB:

That Apollo also has the option of using a long cabled probe so you can keep the main device indoors and just stick the sensor probe outdoors.

Temp sensor doesn’t care about dust. BME280 is humidity sensor.
Use DS18B20.

For outdoors, if BLE is option for you, Switchbot has ip65 sensor with good battery life:

I’m quite happy with it, I’m reading the temp/rh with Esp32 board that is nearby for other purpose.