Re-add testing mode #407

Re-add testing mode

Usage Workflow file

2 errors and 10 warnings

The job was canceled because "Mega_-_Arduino_-_Loops__h" failed.

The operation was canceled.

Compile: home/arduino/user/libraries/TinyGSM/src/TinyGsmClientSequansMonarch.h#L515

'sprintf' writing a terminating nul past the end of the destination [-Wformat-overflow=]

Compile: home/arduino/user/libraries/ModularSensors/src/sensors/DwyerSBLT2.h#L270

'DwyerSBLT2::_conversion_coefficient' will be initialized after [-Wreorder]

Compile: home/arduino/user/libraries/ModularSensors/src/sensors/DwyerSBLT2.h#L270

'float DwyerSBLT2::_conversion_constant' [-Wreorder]

Compile: home/arduino/user/libraries/ModularSensors/src/sensors/DwyerSBLT2.cpp#L16

when initialized here [-Wreorder]

Compile: home/arduino/user/libraries/RTCZero/src/RTCZero.cpp#L96

'oldTime.RTC_MODE2_CLOCK_Type::reg' may be used uninitialized in this function [-Wmaybe-uninitialized]

Compile: home/arduino/user/libraries/PubSubClient/src/PubSubClient.cpp#L523

comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Wsign-compare]

Compile: home/arduino/user/libraries/TinyGSM/src/TinyGsmClientSequansMonarch.h#L515

'sprintf' writing a terminating nul past the end of the destination [-Wformat-overflow=]

Compile: home/arduino/user/libraries/ModularSensors/src/sensors/DwyerSBLT2.h#L270

'DwyerSBLT2::_conversion_coefficient' will be initialized after [-Wreorder]

Compile: home/arduino/user/libraries/ModularSensors/src/sensors/DwyerSBLT2.h#L270

'float DwyerSBLT2::_conversion_constant' [-Wreorder]

Compile: home/arduino/user/libraries/ModularSensors/src/sensors/DwyerSBLT2.cpp#L16

when initialized here [-Wreorder]