Hi Willem,

Great, glad the hardware serial is working.

Regarding the USB TinyShield, it doesn't work directly in that application because the TX/RX are the same as the GPS and not inverted as when compared to the processor board. Wiring it in for that application is probably too much effort. However software on the TinyZero can easily implement a low throughput 'adapter' from hardware to virtual serial in the main loop- look up the "SerialPassthrough" example to get an idea of how to do so.

Thanks,
Ben

Hi Ben,

many thanks.

You are right, crossing Tx and Rx is also necessary for the use as 'USB to UART Bridge'.

I think I will go for a HW solution: an additional temporary cross in the wiring, because the connection to the external GPS units I currently use is through a protoboard with wiring to connectors.

Many thanks again,

Willem