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1.SSH into your Pi

ssh root@<your-pi-ip>

2.Paste the setup block

One paste does it all: it generates a unique station UUID, picks a free local port for MLAT results (starting at 39002), appends the two AlignedContact targets to the end ofFEEDER_ULTRAFEEDER_CONFIG - leaving your existing feeds untouched - and recreates the ultrafeeder container so the new configuration takes effect. The block is idempotent: run it a second time and it will simply do nothing.

CFG=/opt/adsb/config/.env
if grep -q 'feed.alignedcontact.com' "$CFG"; then
  echo "AlignedContact is already configured - nothing to do."
else
  UUID=$(cat /proc/sys/kernel/random/uuid)
  PORT=$(for p in $(seq 39002 39099); do
    if ! grep -q ",$p," "$CFG" && ! ss -ltn 2>/dev/null | grep -q ":$p "; then
      echo "$p"; break
    fi
  done)
  if [ -z "$PORT" ]; then
    echo "No free port found in 39002-39099 - please contact us."
  else
    CUR=$(grep '^FEEDER_ULTRAFEEDER_CONFIG=' "$CFG" | tail -n1 | cut -d= -f2- | sed 's/;*$//')
    ENTRY="adsb,feed.alignedcontact.com,30004,beast_reduce_plus_out,uuid=$UUID;mlat,feed.alignedcontact.com,40147,$PORT,uuid=$UUID,--privacy"
    if [ -n "$CUR" ]; then NEW="$CUR;$ENTRY"; else NEW="$ENTRY"; fi
    if grep -q '^FEEDER_ULTRAFEEDER_CONFIG=' "$CFG"; then
      sed -i "s|^FEEDER_ULTRAFEEDER_CONFIG=.*|FEEDER_ULTRAFEEDER_CONFIG=$NEW|" "$CFG"
    else
      echo "FEEDER_ULTRAFEEDER_CONFIG=$NEW" >> "$CFG"
    fi
    echo "Added AlignedContact (Beast on 30004, MLAT results on local port $PORT). Recreating ultrafeeder..."
    /opt/adsb/docker-compose-start
  fi
fi