I’m trying to do some battery powered sensors for general domotic purpose.
Question for hw experts:
what’s the best solution in your opinion to run a battery powered domotic system? ESP8266 or Arduino micro modded + NRF24? please give also some comments to your choise
@joepesce I have some NRF24’s but I have never used them but I believe they are low power.
What I can say is that running ESP’s on batteries is quite difficult. The “9900mAh” 18650’s that are for sale at a $1 a piece will last around 8 hours on continuous use, but bear in mind the English translation of “9900mAh” is “1200mAh hence the low price”.
So a genuine 18650 of say 5400 mAh that might cost $20 to $30 would last a day and half before it needs recharging. Not long but can obviously be extended by using deepSleep but then a lot of the benefits of an ioT connected device are lost.
I have around 30 of the $1 18650’s and they are actually good value but I wish the suppliers would use the correct English translation (“1200mAh hence the low price”) in their marketing materials.