Monday, December 28, 2015

Remote node code

Just created new GitHub repositories for remote node code and put links to them on the page here on blog.

In the code there is visible declaration of sensors and authentication units, and their way of registration to gateway. In the iButton node, there is also sound and led code that is based on tone library and performs feedback to user. Wired nodes use my own RS485 library, otherwise standard Arduino libraries are used.

Wednesday, December 23, 2015

New node

In past week I have created new board for remote node. Here is render from KiCad, how it should look like. It is my first board after switching from Eagle to KiCad, so we'll see what it will look like in real.

There are many changes, while keeping the current format 5x5cm, I have replaced most of the components. There is new switching power supply, actually two of them. One is for standard DC 5 - 20 V and up to 500mA. Second is for batteries and support voltage from 2 to 5.5 V but only 120mA. There is still present the RS485 half-duplex IC, speaker, and header for 1-Wire touch probe with 2 LEDs. IO Header grew with new pins and most importantly there is place for new RFM69W radio module on the back.

I have plans to use more battery powered nodes that should last long. Either to run them from rechargeable batteries like li-on or li-po or from standard packs or bigger button batteries. Waiting for the boards to get them alive :).