Merge pull request cyberman54#569 from cyberman54/development

Development

Merge pull request cyberman54#565 from cyberman54/development

timesync.cpp: minor sanitizations

Merge pull request cyberman54#514 from cyberman54/development

Add SDcard support | bugfix TTN decoder | bugfix IRQ handler

Merge pull request cyberman54#469 from cyberman54/development

v1.9.6

Merge pull request cyberman54#442 from cyberman54/development

v1.8.2

Merge pull request cyberman54#436 from cyberman54/development

T-BEAM v1.0 ON/OFF button function added

Merge pull request cyberman54#425 from cyberman54/development

i2cscan fixes

Merge pull request cyberman54#412 from cyberman54/development

v1.7.93

Merge pull request cyberman54#406 from cyberman54/development

maintenance and bug fixes

Merge pull request cyberman54#385 from cyberman54/development

v1.7.7