feature request: add CR and CRC-check in MQTT for observer

[on1arf]

Hi,

I run a meshcore observer where I sent the data to my own MQTT server for analysis of the meshcore environment.

Feature-request:

Add the following information to the MQTT data:

• Coding-rate (4/5, 4/6, 4/7, 4/8)
• if a received packet has a valid CRC or not.

reason:
I want to investigate the actual impact of coding-rate on the network: evaluate to what degree changing the CR has impact on the throughput of the network.

For that, we will run a number of meshcore nodes in our network with the a certain CR for a certain period (say, a month) and then analyse to what degree this has impacted the network.

[cwichura]

Mainline firmware has no native MQTT sender. What tool/firmware are you using for your observer? This would be better posed to them directly.

[on1arf]

I use this tool:
https://analyzer.letsmesh.net/observer/onboard?type=companion

From how I understand it, the tool uses the same data you can also get with the "Rx Log" tool in the official meshcore android app.
So I guess the question is if the firmware provides the CR (*) and the "FCS-check" (**) data from the LoRa chip to the logging tool.

(for a sx1276)
(*) (RegModemStat (0x18) bits 7 to 5)
(**) I guess RegIrqFlags (0x12) bit 5 is the best way to find this