I'm a "smart home" lover and I want to make some little data collector "module" for my house. To do so, I search on taobao.com for cheap components since that I'm currently in China :
For communication : NRF24L01 which is a transceiver 2.4Ghz (up to 6 devices can communicate which sounds good)
For programming : Arduino Nano
For the battery : 1x18650 power bank (around 1300 mA)
And one or two sensors like light sensor for exemple
I read a lot of things on power consumption of arduinos boards but I'm still not sure with my actual settings what will it really be so...
My question are :
1 : First, do you think my choices of components seems ok ?
2 : Could you help me calculate the time I could use this module with this battery ? (Let's say I use the "sleep mode" and I send data only if the "light state" change)
Thanks a lot, I hope I was clear cause I'm french and not so good in English.
After studying the basic ideas in the following tutorials, you can make an Arduino that will do what you want and run for at least a year on 2 or 3 AA batteries. No need for dangerous lithium rechargeable batteries.
but, I wanted to know if there was also a way to do it with a existing Arduino and my set up. I know it's more efficient to create my own Arduino but still, I prefer quick and simple installation with a rechargeable battery.
So.. Same question I asked before :
1 : First, do you think my choices of components seems ok ?
2 : Could you help me calculate the time I could use this module with this battery ? (Let's say I use the "sleep mode" and I send data only if the "light state" change)
For the battery : 1x18650 power bank (around 1300 mA)
Power banks are made to charge phones.
When the phone is charged, the power bank turns off.
The current draw of a Nano and NRF24L01 is likely too low to keep the power bank on.
Leo..
I'm not sure but I saw a video with my battery power bank and it seems that this one particularly stay on event on low draw, but you are maybe right !
I already did a project with it with a Arduino nano and this battery but not in sleep mode and with a bluetooth shield and It seems running, maybe it was suffisant to keep it on ?
Hi Simon, here is how I built the temp/humidity sensors for my home. I thought you might like to see an alternative approach. The design is very simple with a few inexpensive components. Each module communicates via WiFi directly to a remote database on the web, so I can view the readings from anywhere. The AAA size li-ion batteries last about 3 weeks. A larger 18650 size would last probably 6 months.
