Wrapper script for sending OTA updates to your ESP8266/NodeMCU.

ota.sh

#!/bin/bash

# Wrapper script for sending OTA updates to your ESP8266 running NodeMCU.
# See https://judepereira.com/blog/sending-ota-updates-over-wifi-to-your-esp8266/

HOST=192.168.178.25
PORT=8080

for i in "$@"; do
    FILE=$i
    echo "Sending $i..."
    echo -n "BEGIN $FILE" | nc $HOST $PORT
    while read -r line; do
        #echo -n "write: $line ... "
        if ! echo "$line" | nc $HOST $PORT | grep "ok" &>/dev/null; then
            echo "Write failed! Please retry..."
            exit 1
        fi
    done <"$FILE"

    echo -n "DONE" | nc $HOST $PORT
done

echo -n "RESTART" | nc $HOST $PORT