# LoRA BME280 Environmental Node (with webbased backend)

**URL:** <https://www.thethingsnetwork.org/forum/t/lora-bme280-environmental-node-with-webbased-backend/9264>\
**Category:** Use Cases\
**Created:** [August 31, 2017, 2:34pm UTC](https://www.thethingsnetwork.org/forum/t/lora-bme280-environmental-node-with-webbased-backend/9264 "2017-08-31T14:34:09Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![lex\_ph2lb](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/lex_ph2lb/32/44998_2.png) [@lex\_ph2lb](https://www.thethingsnetwork.org/forum/u/lex_ph2lb)\
**Post date:** [August 31, 2017, 3:12pm UTC](https://www.thethingsnetwork.org/forum/t/lora-bme280-environmental-node-with-webbased-backend/9264/3 "2017-08-31T15:12:38Z")

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Don’t know yet, I updated the firmware of the node on 25 juli 2017 with a firmware containing the great [Battery ADC method](https://www.thethingsnetwork.org/forum/t/full-arduino-mini-lorawan-and-1-3ua-sleep-mode/8059/32?u=lex_ph2lb) from @Charles. And still haven’t lost 0.1V from that day (the resistor battery monitor was unstable).  
The ArduinoMiniPro has a brownout of 1.8V. So I hope it will have enough power for atleast a year 🙂

My first prototype had the default brown-out of 3.3V, wasn’t very low power (had 1 low current power indicator led) and used 3 very cheap AAA batteries as a power source. Giving enough power for just 2 months before going down.

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