Hi,
I have a project in mind, and I'm trying to figure out the best Bluetooth board that I would need to accomplish it. Basically, I want to be able to wave my foot under the trunk of my SUV, and the lift gate will open. Here's how I plan to accomplish it: pair my cellphone with a Bluetooth board. Connect that board to an Arduino. On a continuous basis (with sleep intervals in between), the Arduino and the Bluetooth board will scan for the presence of my phone. If it's found, it will activate a motion sensor. If motion is detected (my foot waving underneath the car), it will open the liftgate (this part will be handled by my mechanic).
So, the question is, what Bluetooth board would be best for this project? It obviously needs to have scanning capability, and the lower the power usage, the better (ideally I only want this system activated when I'm very close to the car anyhow).
Thanks!
I imagine this might be one for the HM-10. This is BLE, low energy and compatible with iPhone. I don't think any bluetooth module has scanning capability. That's Arduino's job.
I understand there is a big difference in power consumption between BLE and plain-vanilla blue tooth but this might not amount to anything when you are using a car battery to drive it.
The HM-10 can replace an HC-05 and therefore can be configured as a master, but I'm getting the impression that master is a relative term and you need to check that it is capable of sniffing for a phone.
In view of the above, you might be better off with a BlueSmirf, which I believe has better capabilities, but is not BLE and I don't believe it will work with IPhone.
I only assume this stunt is phone-dependent and it would pay to check how cars do this. It is just as likely to be part of the locking system and it might actually be simpler if you work on that.