Smart Doorbell System - Part 1 - Getting to know the CC2640R2

RE: Smart Doorbell System - Part 1 - Getting to know the CC2640R2

aspork42 — Sat, 12 May 2018 04:43:10 GMT

Cool idea!

I have long had lose ideas/plans to make my own doorbell pushbutton / chime system. In the US there is usually around 16-18 VAC available at the pushbutton; so if one is crafty they can make a power supply from that.

If you are planning on a 1 year battery life, that would be awesome. I've done battery projects (Using Arduino ProMini + ESP 01 module) and it was a lot of work to get the power consumption down.

RE: Smart Doorbell System - Part 1 - Getting to know the CC2640R2

mcb1 — Mon, 07 May 2018 22:18:51 GMT

Great Project.

Determining where to stop is key to these Design Challenges, as it's easy to run out of time ... [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-b3c916a5-0d7e-4751-81e6-23a41e6ec40d/contentimage_5F00_1.png:16:16]

I wonder if the next iteration (2.1) you can add battery low warning that triggers the chime, in theory you only need to check it at each bell press, and act if it is low.

Look forward to the upcoming posts.

Mark

RE: Smart Doorbell System - Part 1 - Getting to know the CC2640R2

Jan Cumps — Sun, 06 May 2018 18:31:11 GMT

I've worked with that Sensor Controller Engine on another BLE microcontroller, from the same family as yours.

Here's a blog series on what it does for the CC sub-1 GHz controllers (it's 3 blogs, starting with a project, finishing with power profiling):

SimpleLink[emoticon:7d377b609b6f44bf9290e3d8a0b9a733] Sub-1 GHz Wireless Microcontroller - Sensor Controller Engine Part 1: Dry Run

The CC1310 in that example is a very close nephew to your controller. It has a radio that's configured for sub-1 GHz instead of BLE, but the rest uses similar concepts (separate ARMS for core and radio, the sensor engine).

These are actually devices made by another company that's acquired by TI. That's one of the reasons why you get different GUIs for core (CCS), radio (SmartRF Studio) and sensor engine (Sensor Controller Studio). The edges are still rough here and there ...

RE: Smart Doorbell System - Part 1 - Getting to know the CC2640R2

DAB — Sun, 06 May 2018 17:22:19 GMT

Interesting project.

DAB

RE: Smart Doorbell System - Part 1 - Getting to know the CC2640R2

Jan Cumps — Sun, 06 May 2018 16:48:24 GMT

[mention:b0bc65b9ecdc4307bd967592f00e340a:e9ed411860ed4f2ba0265705b8793d05] , check out the onboard Sensor Controller Engine. You may be able to put the ARM core and BLE radio in a deep deep sleep with that SCE serving as low power watchdog - certainly for the sending side. It can wake up the other parts of the IC when receiving a bell button push ...

edit: ah, I see you mentioned it. MIssed that on first read.

RE: Smart Doorbell System - Part 1 - Getting to know the CC2640R2

genebren — Sun, 06 May 2018 15:47:09 GMT

Shabaz,

This is a great start to your doorbell project. I like how you are already limiting the 'creep' of features right at the beginning (where it should be). I look forward to following along with your updates and seeing where this goes.

Good luck!

Gene