How many "hops" can lora do?

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1

Just wondering how many times a message can be repeated across a mesh network.

2

This protocol maxes out at 7. But it is really more limited by all nodes only having one radio (which is a fine choice for cost and complexity reasons).

The sending node specifies a Max hops per packet and currently picks 3 for that value. Because given the long range of the radios and the initial use case that makes sense (given that we mostly use naive flood routing).

I’ve promised @CycloMies an updated version of the protocol doc this week. And he will further improve it.

3

So three is the limit for now, but 7 might be in the near future?

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4

This is an important topic to myself as well. I am curious how the protocol behaves when there are multiple devices between exceeding the 3 hops default and how the design decides routes to provide delivery?

5

Thanks to @geeksville and @CycloMies please look at documentation that is now provided
I think it helps a lot in explaining what options are available.

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6

My request, when the android app shows a check mark in the ‘cloud’ that the message is acknowledged/received, … I would like to know the ‘name’ of the device that has acknowledged receipt.

The reason… If a nearby device acknowledged receipt… then it might not mean the ‘mesh’ has received the message.

The second reason, once a message is acknowledged, it is no longer in the transmit que. I kinda like the minimum number of re-tries still performed by the original initiating device.