How much time for set up 100 relay node.

[Carey]

I have to question: 1: if customer use relay node for mesh net, how much is the power consumption for one node? is there any passable to declare the power consumption to lower than 5mA(nrf52832)?

2: if customer have 100 relay node. and they just can connected one by one, how much time for the first node to transmit the last node? and when they all closed and power on together, how much time do they need spend for all the relay node totally set finished?

[Matt]

How close is "all closed"? With 100 nodes it's highly unlikely they are "all close" to within 1 room? Maybe across 2 floor is what you have in mind?

[Carey]

for example, a computer with Widows10 power on and reset, maybe they need 10 or 20 second time for start widows, I mean, How much time for 100 relay node configure or start after power on or reset?

[Matt]

I doubt you ever power down all the relay nodes (why???); they go to sleep mode if nothing else is "happening", but since they relay messages the radio is on most of the time, and that more or less answers your question 1: it is most likely more than 5mA you are looking at for those relay nodes.

[thst]

1. Currently relay nodes are not 'low-power' in the mesh specification because they have the radio listening 100%. You can lower this to trade off battery for packet latency if you don't need <20ms delays.

2. It takes ~7 seconds for a node to reboot, initialize, and re-sync keys with the network. This is assuming that the previous keys&state were stored in flash. (optional feature in the nRF Mesh SDK) If you don't save network state, then provisioner will have to add them 1 at a time, after they have initialized. ~2 seconds per node.

   100 nodes with Persistant storage:      7 seconds  
   100 nodes without Persistant storage: 4 minutes