Implement exponential retry/back-off strategy to avoid router overloading.

[aentinger]

No description provided.

[codecov-commenter]

Codecov Report

Merging #244 (621c1a3) into master (e5a6256) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #244   +/-   ##
=======================================
  Coverage   95.15%   95.15%           
=======================================
  Files          24       24           
  Lines         867      867           
=======================================
  Hits          825      825           
  Misses         42       42           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e5a6256...621c1a3. Read the comment docs.

[facchinm]

I think the big overhead could be due to pow() or std::min. Can we use arduino's min or a simplified version of pow() based on bitshift?

[aentinger]

Hi @facchinm 👋
I was wondering too why such a large increase of flash consumption happened. Good catch! I've replaced it with bit-shift mechanics although I don't particularly like that due to readability. However, the reduction in flash speaks for itself 👍

With regards to std::min - that was a workaround to allow compilation on all platforms, I've also dropped it (the whole commit).

[github-actions]

Memory usage change @ c543d14

Board	flash	%	RAM for global variables	%
arduino:mbed:envie_m4	🔺 +128 - +192	+0.01 - +0.02	🔺 +8 - +8	0.0 - 0.0
arduino:mbed:envie_m7	🔺 +184 - +192	+0.02 - +0.02	🔺 +8 - +8	0.0 - 0.0
arduino:mbed_nano:nanorp2040connect	🔺 0 - +104	0.0 - 0.0	🔺 0 - +8	0.0 - 0.0
arduino:samd:mkr1000	🔺 +152 - +152	+0.06 - +0.06	🔺 +8 - +8	+0.02 - +0.02
arduino:samd:mkrgsm1400	🔺 +160 - +160	+0.06 - +0.06	🔺 +8 - +8	+0.02 - +0.02
arduino:samd:mkrnb1500	🔺 +152 - +152	+0.06 - +0.06	🔺 +8 - +8	+0.02 - +0.02
arduino:samd:mkrwan1300	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkrwifi1010	🔺 0 - +152	0.0 - +0.06	🔺 0 - +8	0.0 - +0.02
arduino:samd:nano_33_iot	🔺 0 - +152	0.0 - +0.06	🔺 0 - +8	0.0 - +0.02
esp32:esp32:esp32	🔺 +164 - +164	+0.01 - +0.01	🔺 +8 - +8	0.0 - 0.0
esp8266:esp8266:huzzah	🔺 +156 - +172	+0.01 - +0.02	🔺 +52 - +52	+0.06 - +0.06

Click for full report table

Board	examples/ArduinoIoTCloud-Advanced flash	%	examples/ArduinoIoTCloud-Advanced RAM for global variables	%	examples/ArduinoIoTCloud-Basic flash	%	examples/ArduinoIoTCloud-Basic RAM for global variables	%	examples/utility/ArduinoIoTCloud_Travis_CI flash	%	examples/utility/ArduinoIoTCloud_Travis_CI RAM for global variables	%	examples/utility/Provisioning flash	%	examples/utility/Provisioning RAM for global variables	%	examples/utility/SelfProvisioning flash	%	examples/utility/SelfProvisioning RAM for global variables	%
arduino:mbed:envie_m4	128	0.01	8	0.0	192	0.02	8	0.0	184	0.02	8	0.0	192	0.02	8	0.0
arduino:mbed:envie_m7	192	0.02	8	0.0	184	0.02	8	0.0	184	0.02	8	0.0	192	0.02	8	0.0
arduino:mbed_nano:nanorp2040connect	104	0.0	8	0.0	104	0.0	8	0.0	104	0.0	8	0.0	96	0.0	8	0.0	0	0.0	0	0.0
arduino:samd:mkr1000	152	0.06	8	0.02	152	0.06	8	0.02	152	0.06	8	0.02	152	0.06	8	0.02
arduino:samd:mkrgsm1400	160	0.06	8	0.02	160	0.06	8	0.02	160	0.06	8	0.02	160	0.06	8	0.02
arduino:samd:mkrnb1500	152	0.06	8	0.02	152	0.06	8	0.02	152	0.06	8	0.02	152	0.06	8	0.02
arduino:samd:mkrwan1300	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:samd:mkrwifi1010	152	0.06	8	0.02	152	0.06	8	0.02	152	0.06	8	0.02	144	0.05	8	0.02	0	0.0	0	0.0
arduino:samd:nano_33_iot	152	0.06	8	0.02	152	0.06	8	0.02	152	0.06	8	0.02	152	0.06	8	0.02	0	0.0	0	0.0
esp32:esp32:esp32	164	0.01	8	0.0	164	0.01	8	0.0	164	0.01	8	0.0
esp8266:esp8266:huzzah	156	0.01	52	0.06	172	0.02	52	0.06	156	0.01	52	0.06

Click for full report CSV

Board,examples/ArduinoIoTCloud-Advanced<br>flash,%,examples/ArduinoIoTCloud-Advanced<br>RAM for global variables,%,examples/ArduinoIoTCloud-Basic<br>flash,%,examples/ArduinoIoTCloud-Basic<br>RAM for global variables,%,examples/utility/ArduinoIoTCloud_Travis_CI<br>flash,%,examples/utility/ArduinoIoTCloud_Travis_CI<br>RAM for global variables,%,examples/utility/Provisioning<br>flash,%,examples/utility/Provisioning<br>RAM for global variables,%,examples/utility/SelfProvisioning<br>flash,%,examples/utility/SelfProvisioning<br>RAM for global variables,%
arduino:mbed:envie_m4,128,0.01,8,0.0,192,0.02,8,0.0,184,0.02,8,0.0,192,0.02,8,0.0
arduino:mbed:envie_m7,192,0.02,8,0.0,184,0.02,8,0.0,184,0.02,8,0.0,192,0.02,8,0.0
arduino:mbed_nano:nanorp2040connect,104,0.0,8,0.0,104,0.0,8,0.0,104,0.0,8,0.0,96,0.0,8,0.0,0,0.0,0,0.0
arduino:samd:mkr1000,152,0.06,8,0.02,152,0.06,8,0.02,152,0.06,8,0.02,152,0.06,8,0.02,,,,
arduino:samd:mkrgsm1400,160,0.06,8,0.02,160,0.06,8,0.02,160,0.06,8,0.02,160,0.06,8,0.02,,,,
arduino:samd:mkrnb1500,152,0.06,8,0.02,152,0.06,8,0.02,152,0.06,8,0.02,152,0.06,8,0.02,,,,
arduino:samd:mkrwan1300,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,,,,,,,,
arduino:samd:mkrwifi1010,152,0.06,8,0.02,152,0.06,8,0.02,152,0.06,8,0.02,144,0.05,8,0.02,0,0.0,0,0.0
arduino:samd:nano_33_iot,152,0.06,8,0.02,152,0.06,8,0.02,152,0.06,8,0.02,152,0.06,8,0.02,0,0.0,0,0.0
esp32:esp32:esp32,164,0.01,8,0.0,164,0.01,8,0.0,164,0.01,8,0.0,,,,,,,,
esp8266:esp8266:huzzah,156,0.01,52,0.06,172,0.02,52,0.06,156,0.01,52,0.06,,,,,,,,