I just completed this setup again after updating to a 2TB SSD and Raspberry Pi 5 with 8 GB of RAM, and it took me a took me a while to figure this out again - I was stuck at step 2 above:
- For Type, select Private Electrum
I couldn’t find the correct URL on my Umbrel for Sparrow’s Private Electrum server option in the Bitcoin Node (Core) app on Umbrel. You have to install Electrs - go into the Electrs app on Umbrel and copy the Tor address into the Sparrow URL field along with the port # (typically 50001).
As explained on the Sparrow website, using the Electrs (Electrum server) instead of Bitcoin Node (Bitcoin core) app provides speed and privacy over connecting directly to the bitcoin node with how it indexes transactions.