No need to wait after Wire.requestFrom() and it should not be followed by Wire.endTransmission().

[Koepel]

In the file "Radio/src/SI4703.cpp" the waiting after a Wire.requestFrom() may be removed. It is this line: while(Wire.available() < 32) ;

In the file "Radio/src/RDA5807M.cpp" the Wire.requestFrom() is followed by a Wire.endTransmission() in four places. Those Wire.endTransmission() may be removed.

Explanation: Common-mistakes, number 1 and 2.

[mathertel]

added changes to the code. Waiting for test results before creating new version.