Helper script to enter DFU mode from recovery on A11+ devices

a11dfu.sh

#!/bin/sh -e

step() {
    for i in $(seq "$1" -1 1); do
        printf '\r\e[1;36m%s (%d) ' "$2" "$i"
        sleep 1
    done
    printf '\r\e[0m%s (0)\n' "$2"
}

step 3 'get ready'
step 4 'hold volume down + side button' &
sleep 3
irecovery -c reset
sleep 1
step 10 'release side button but keep holding volume down'
if lsusb | grep -q 'DFU Mode'; then
    echo 'successfully entered DFU'
else
    echo 'failed to enter DFU, try again'
fi