Hi,
Looking at the code for setVal, although the comment in the code says that it sets an 8-bit value, value is actually taken to be 16 bits and is copied into payloadCfg[8] and payloadCfg[9].
8 and 32 bit versions are needed. Strictly, a 64-bit version is needed too for double precision values.
My approach would be to create setVal8, setVal16 and setVal32.
Let me know if you need a pull request.
Many thanks!
Paul