# Best way to do a temperature sensing projekt without access to wifi or power **URL:** \ **Category:** Projects\ **Created:** [March 1, 2018, 10:05am UTC](https://forums.pimoroni.com/t/best-way-to-do-a-temperature-sensing-projekt-without-access-to-wifi-or-power/7247 "2018-03-01T10:05:26Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![shiggyDiggy](https://avatars.discourse-cdn.com/v4/letter/s/35a633/32.png) [@shiggyDiggy](https://forums.pimoroni.com/u/shiggyDiggy)\ **Post date:** [March 1, 2018, 10:05am UTC](https://forums.pimoroni.com/t/best-way-to-do-a-temperature-sensing-projekt-without-access-to-wifi-or-power/7247/1 "2018-03-01T10:05:26Z")
Hi! I’ve a project where I want to sense the temperature/humidity where I got no access to either wifi/ethernet connections or power and want send a notification without using too much power being on a battery. So far I got thinking around using a Adafruit Feather or likewise with a gsm module but that looks quite expensive (which is not a deal breaker but…). Another thing that came up was to utilize radio but I don’t even know if that is possible since I got no experience there. Previous projects has been various sensing stuff with raspberry pi’s but those boards feels a bit overpower for a “lite” project as this. Any ideas? ---
**Author:** ![gadgetoid](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/gadgetoid/32/13_2.png) [@gadgetoid](https://forums.pimoroni.com/u/gadgetoid)\ **Post date:** [March 1, 2018, 10:13am UTC](https://forums.pimoroni.com/t/best-way-to-do-a-temperature-sensing-projekt-without-access-to-wifi-or-power/7247/2 "2018-03-01T10:13:20Z")
Depending on where you want to deploy it and what country you’re in, you may be able to use anything from a pair of simple long range serial radio breakouts to LoRaWan or SigFox and probably a whole bunch of stuff in between. What are the distances involved? ---
**Author:** ![shiggyDiggy](https://avatars.discourse-cdn.com/v4/letter/s/35a633/32.png) [@shiggyDiggy](https://forums.pimoroni.com/u/shiggyDiggy)\ **Post date:** [March 1, 2018, 10:16am UTC](https://forums.pimoroni.com/t/best-way-to-do-a-temperature-sensing-projekt-without-access-to-wifi-or-power/7247/3 "2018-03-01T10:16:40Z")
Based in Sweden. Well perhaps around 25-35 meters to where I can put up a hub so to speak. ---
**Author:** ![gadgetoid](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/gadgetoid/32/13_2.png) [@gadgetoid](https://forums.pimoroni.com/u/gadgetoid)\ **Post date:** [March 1, 2018, 10:33am UTC](https://forums.pimoroni.com/t/best-way-to-do-a-temperature-sensing-projekt-without-access-to-wifi-or-power/7247/4 "2018-03-01T10:33:19Z")
You’ll probably want something like this: [https://shop.pimoroni.com/products/adafruit-rfm69hcw-transceiver-radio-breakout](https://shop.pimoroni.com/products/adafruit-rfm69hcw-transceiver-radio-breakout) Albeit these are still overkill- in the right conditions they can achieve multiple kilometres of range. You’d probably want a Feather with one of these modules, and a corresponding module to connect with the host. As for whether that should be a Cortex M0 or ATMega 32u4 feather- it’s debatable, some good info here: [https://forums.adafruit.com/viewtopic.php?f=24&t=85750](https://forums.adafruit.com/viewtopic.php?f=24&t=85750) It will boil down to what you’re most comfortable working with, since either one of them can be set up to have extremely low idle power consumption. ---
**Author:** ![shiggyDiggy](https://avatars.discourse-cdn.com/v4/letter/s/35a633/32.png) [@shiggyDiggy](https://forums.pimoroni.com/u/shiggyDiggy)\ **Post date:** [March 1, 2018, 10:37am UTC](https://forums.pimoroni.com/t/best-way-to-do-a-temperature-sensing-projekt-without-access-to-wifi-or-power/7247/5 "2018-03-01T10:37:38Z")
Thank you, now my project feels somewhat possible. But the sms route, would you skip that? ---
**Author:** ![gadgetoid](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/gadgetoid/32/13_2.png) [@gadgetoid](https://forums.pimoroni.com/u/gadgetoid)\ **Post date:** [March 1, 2018, 1:13pm UTC](https://forums.pimoroni.com/t/best-way-to-do-a-temperature-sensing-projekt-without-access-to-wifi-or-power/7247/6 "2018-03-01T13:13:01Z")
The power requirements for GSM would be higher, it depends if you want a solution you can deploy even _further_ outside of the range of other networks or if you want the slightly easier/possibly more robust in some cases GSM. GSM has to find a network, register, etc before it can even transmit any data. LoRa and similar radio setups just fire-and-forget.