Flash sonoff with Tasmota #sonoff #tasmota

sonoff-flash.sh

#!/bin/bash

## Hotspot should be created
#  sonoffDiy 20170618sn
#  ref: https://www.sigmdel.ca/michel/ha/sonoff/sonoff_mini_en.html
#  ref: https://github.com/itead/Sonoff_Devices_DIY_Tools/blob/master/other/SONOFF%20DIY%20MODE%20Protocol%20Doc%20v1.4.md

download() {
  # Download latest
  # Get lite version (must be less 508kb!)
  latest_url=$(curl -s https://api.github.com/repos/arendst/Tasmota/releases/latest | sed -n '/browser_download_url.*tasmota-lite.bin/ { s/.*https:\(.*\)"/https:\1/; p }')
  latest_ver=$(echo $latest_url | sed 's/.*releases\/download\/\(v.*\)\/.*/\1/')
  firmware_path="firmwares/$latest_ver/tasmota-lite.bin"

  # overwrite the exising firmware
  if [ ! -f "$firmware_path" ]; then
    mkdir -p "$(dirname $firmware_path)"
    echo "Downloading the latest firmware $url..."
    curl -Lo $firmware_path "$latest_url" || exit 1
    echo
  else
    echo -e "The latest firmware has been download already...\n"
  fi 
}

checkDiy_wifi() {
  if ( ! nmcli -t dev wifi | grep -q "*:sonoffDiy" ); then
    echo "Create sonoffDiy hotspot with password 20170618sn and connect to it (must have Internet access!)."
    echo "https://www.sigmdel.ca/michel/ha/sonoff/sonoff_mini_en.html#desktop_ap"
    echo -n "Procced (press any key)"
    read
    echo
  fi
  nmcli -t dev wifi | grep -q "*:sonoffDiy" || { echo -e "Not connected. Aborting...\n"; exit 1; }
}

## ------- Script entry 
#

## Check CLI
requires=()
which avahi-browse &> /dev/null || requires+=("avahi-browse")
which nmcli &> /dev/null || requires+=("nmcli")
which docker &> /dev/null || requires+=("nmcli")

reqs=$(printf ', %s' "${requires[@]}")

if [ "$reqs" != ", " ]; then
  echo -e "Expecting ${reqs:1} to available. Aborting...\n"
  exit 1
fi

# 1. Check wifi
checkDiy_wifi

# 2. Download the latest firmware
export firmware_path
download

echo $firmware_path

# 3. Start nginx
## cleanup
function cleanup {
  set +x
  echo -n "Removing docker containers... " && docker rm -f sonoffdiy.$$
}
trap cleanup EXIT

echo "Starting nginx docker container..." && docker run --rm --name sonoffdiy.$$ -v $(pwd)/$(dirname $firmware_path):/usr/share/nginx/html:ro -p 38181:80 -d nginx
echo

# 4. Flash
# --------
shasum=$(sha256sum $firmware_path | cut -f1 -d' ')

# locate device_id and device_url
# read device_id device_url <<< $( avahi-browse -r _ewelink._tcp -t -p | sed -n '1d;s/.*eWeLink_\(.*\).local;\(.*\);.*/\1 \2/;s/;/:/p' )
if [ -z "$device_id" -o -z "$device_url" ]; then
  echo "Check sonoff mDNS device is avaiable..."
  echo -e "avahi-browse -r _ewelink._tcp -t -p\n"
  exit 1
fi

# flash
server_ip=$(nmcli connection show sonoffDiy | grep IP4.ADDRESS | tr -s ' ' | cut -f2 -d' ' | sed 's/\/.*//')
if [ -z "$server_ip" ]; then
  echo "Check connection sonoffDiy. Got empty address."
  exit 1
fi

read -r -d '' flash_payload <<-EHD
{"deviceid":"$device_id","data":{"downloadUrl":"http://$server_ip:38181/$(basename $firmware_path)","sha256sum":"$shasum"}}
EHD

echo "Unlock and start flasing..."
set -x
curl http://$device_url/zeroconf/ota_unlock -XPOST -d "{\"deviceid\":\"$device_id\",\"data\":{}}" && \
curl http://$device_url/zeroconf/ota_flash -XPOST -d "${flash_payload}"

echo "Wait for firmware to be downloaded (for 45 sec)..."
sleep 45