Posted 02 February 2015 - 07:51 PM
Posted 02 February 2015 - 07:54 PM
Posted 02 February 2015 - 10:17 PM
Edited by TerryE, 02 February 2015 - 10:18 PM.
Posted 03 February 2015 - 08:33 AM
Edited by Alphonsox, 03 February 2015 - 08:36 AM.
Posted 09 February 2015 - 03:30 PM
Posted 09 February 2015 - 04:27 PM
Posted 09 February 2015 - 04:46 PM
Posted 09 February 2015 - 04:51 PM
Posted 09 February 2015 - 04:55 PM
Posted 09 February 2015 - 06:26 PM
In this application less is better. To be quite honest, the bandwidth and communications requirements between the master and slave are tiny: read and write access to a register pad of maybe 64-128 bytes which contains set parameters and data out values. A simple AT protocol would be quite adequate here.
I agree SPI or I²C is really for on board (or adjacent board) connectivity. When I read the specs last week, I realised that it's not really designed for driving over distances. However, USB will happily go up to 5m per repeater and this fine for my needs and the geometry of my house. I could have the FTDI USB->3.3 V TTL serial I/F 5m from the controller Pi 2 or multiple slaves configured this way if I wanted. I just can't have multiple masters on the same USB. Ditto for connections to an AVR micro-controller (e.g,Ardiuno).
Edited by TerryE, 10 February 2015 - 12:32 PM.
Posted 09 February 2015 - 06:43 PM
Posted 10 February 2015 - 12:42 PM
Posted 26 November 2015 - 12:14 PM
We haven't had an oven since the end of March and it doesn't look like we'll get one in time for Christmas either.
Posted 30 November 2015 - 01:37 PM
It is easy enough to write a bit of Python script to send the data using FTPLIB, but how do I make sure it is really secure.
Is there an easy way to encrypt the data before transmission in Python?