Wishlist

A short list of all kinds of wishes regarding the great Pahka

For the project in general:

1.1 reasonably fault-tolerant

• galvanic isolation will limit small electrical troubles to area governed with one Pahka node
• back-up battery will provide tolerance for power loss for a time
• single points of failure are numerous, this is not a HA solution
• failure at one node should not propagate
  • non-managed switches cannot shut down possible flooding from a faulty node, this is considered an accepted risk.
• all nodes should have a reasonable safe modus operandi in case of connectivity issues
  • door locks open or close based on what the door is for
  • what should the alarm actuators do?

1.2 centrally configured

• a node reads its configuration from the control node at boot time

1.3 reconfigurable

1.4 centrally controlled ?? or just centrally managed?

• nodes only communicate with the controller node

1.5 able to map any input to any action

1.6 acts as an extra input for a home protection system?

• connection faults can possibly indicate break ins (or not)

For the controller node

2.x

For the remote node

3.1 inputwise:

• logic level digital in (at what voltages?)
• current loop 4-20mA for interfacing with factory transducers etc
• 0-10V voltage input
• DMX512 (wishful...)
• 230VAC digital input (needs galvanic isolation)
• PWM input
• servo pulse input

3.2 outputwise:

• logic level digital out
• 4-20mA current loop
• 0-10V voltage output
• DMX512
• one or three phase triac on/off control
• PWM output
• servo pulse output

For the gateway to other networks

4.1