Hi Paul - Thanks for your sleuthing and recommended fix. I owe you. I can confirm the bug (introduced by me back in oct from user’s recommendation) and fix with your (uint8_t *) type cast.
New library version is pushed : https://github.com/sparkfun/SparkFun_Si … tag/v1.0.7
Should hit the IDE shortly. If you folks find any other issues please let me know.
Luke - sorry for running you round ragged. I hope this gets you going in the right direction.