Can someone help with a method of flashing firmware onto the FRSKY XSR mini receiver please.
The beat way is to connect it to your taranis and load firmware via the taranis menu in our frsky receiver firmware update guide - http://www.dronetrest.com/t/how-to-upgrade-your-frsky-receiver-firmware-x8r-x4r-x4r-sb/1667
It doesn't have a pic showing how to connect the XSR but it's the same idea as all the others where you need to connect positive, negative and the signal wire to the back port on your taranis.
Thanks for the link. Do I connect it to the ppm or sbus?
You need to connect the Smart port (S.port) pin to your radio, so in the case of the XSR it's the middle pin