Thanks for the quick reply and I'm glad it's an original. As I plan to buy some more I had to be sure that they are not copies. With the firmware it was stupidity on my part because I thought the programming time was displayed, but it is the build time and this does not change if the current firmware is already installed. Installing an earlier version works fine and then the build time also changes.
Another thing that drives me crazy is the power switch. When I have connected the TinySA via USB, I cannot switch on the device. When I unplug the USB and move the switch from the right to the left position and then immediately back to the right position, the device switches on. Is this normal switch-on behaviour? Incidentally, I can also switch the device on in this way if I have connected the USB cable to a power supply unit rather than to the PC. However, I always have to switch the switch back and forth quickly.
I've tried it umpteen times and always get the same result.
