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Generic Node Sensor Edition
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FreeRTOS RX retrieval windows to long #203

Open mcserved opened 3 years ago

mcserved commented 3 years ago

Summary:

FreeRTOS has some drift, causing downlinks to fail. This relates to PR #202 and issue #187.

Steps to Reproduce:

  1. Default value should show this in current consumption: image
  2. Change this: https://github.com/TheThingsIndustries/generic-node-se/blob/40636650a7cb9c0030e3905d1359de02d75471b3/Software/app/freertos_lorawan/conf/lorawan_conf.h#L117 And this will produce this image: image With this timing:
basic_lorawan freertos_lorawan (new) freertos
5s14ms 5s129ms 4s980ms
218ms 271ms 531ms
781ms 754ms 492ms
218ms 271ms 531ms

What do you see now?

Delayed RX windows.

What do you want to see instead?

RX windows closer to their appropriate values.

How do you propose to implement this?

Find the cause of the drift delaying the downlink.

Environment:

FreeRTOS

What can you do yourself and what do you need help with?

All

elsalahy commented 2 years ago

@marnixcro Can you please share some informations on your attempts to solve this?

mcserved commented 2 years ago

@marnixcro Can you please share some informations on your attempts to solve this?

I tried finding the cause with the clocks drifting, but the datasheet mentioned max drifts of only 1-2% on these clocks. I have not been able to find where in the firmware the downlink event gets triggered.

NicolasMrad commented 2 years ago

is this still relevant?