compile with esp mqtt lib

lib/espMqttClient/scripts/CI/build_examples_pio.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+
+# already done by workflow
+#pip install -U platformio
+#platformio update
+#pio pkg install --global --library me-no-dev/AsyncTCP
+#pio pkg install --global --library EspAsyncTCP
+
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[0;33m'
+NC='\033[0m'
+
+lines=$(find ./examples/ -maxdepth 1 -mindepth 1 -type d)
+retval=0
+retvalpart=0
+while read line; do
+  if [[ "$line" != *esp8266 && "$line" != *esp32 && "$line" != *linux ]]; then
+    echo -e "========================== BUILDING $line =========================="
+    echo -e "${YELLOW}SKIPPING${NC}"
+    continue
+  fi
+  echo -e "========================== BUILDING $line =========================="
+  if [[ -e "$line/platformio.ini" ]]; then
+    output=$(platformio ci --lib="." --project-conf="$line/platformio.ini" $line 2>&1)
+    retvalpart=$?
+  else
+    if [[ "$line" == *esp8266 ]]; then
+      output=$(platformio ci --lib="." --project-conf="scripts/CI/platformio_esp8266.ini" $line 2>&1)
+      retvalpart=$?
+    else
+      output=$(platformio ci --lib="." --project-conf="scripts/CI/platformio_esp32.ini" $line 2>&1)
+      retvalpart=$?
+    fi
+    :
+  fi
+  if [ $retvalpart -ne 0 ]; then
+    echo "$output"
+    echo -e "Building $line ${RED}FAILED${NC}"
+    retval=1
+  else
+    echo -e "${GREEN}SUCCESS${NC}"
+  fi
+done <<< "$lines"
+
+# will be deleted together with container
+#pio pkg uninstall --global --library me-no-dev/AsyncTCP
+#pio pkg uninstall --global --library EspAsyncTCP
+
+exit "$retval"

lib/espMqttClient/scripts/CI/platformio_esp32.ini

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+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:esp32]
+platform = espressif32
+board = lolin32
+framework = arduino
+build_flags =
+  ;-Werror
+  -Wall
+  -Wextra

lib/espMqttClient/scripts/CI/platformio_esp8266.ini

@@ -0,0 +1,18 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:esp8266]
+platform = espressif8266
+board = d1_mini
+framework = arduino
+build_flags =
+  ;-Werror
+  -Wall
+  -Wextra

lib/espMqttClient/scripts/get-fingerprint.py

@@ -0,0 +1,30 @@
+#!/usr/bin/env python
+
+# https://github.com/marvinroger/async-mqtt-client/blob/develop/scripts/get-fingerprint/get-fingerprint.py
+
+import argparse
+import ssl
+import hashlib
+
+parser = argparse.ArgumentParser(description='Compute SSL/TLS fingerprints.')
+parser.add_argument('--host', required=True)
+parser.add_argument('--port', default=8883)
+
+args = parser.parse_args()
+print(args.host)
+
+cert_pem = ssl.get_server_certificate((args.host, args.port))
+cert_der = ssl.PEM_cert_to_DER_cert(cert_pem)
+
+md5 = hashlib.md5(cert_der).hexdigest()
+sha1 = hashlib.sha1(cert_der).hexdigest()
+sha256 = hashlib.sha256(cert_der).hexdigest()
+print("MD5: " + md5)
+print("SHA1: " + sha1)
+print("SHA256: " + sha256)
+
+print("\nSHA1 as array initializer:")
+print("const uint8_t fingerprint[] = {0x" + ", 0x".join([sha1[i:i+2] for i in range(0, len(sha1), 2)]) + "};")
+
+print("\nSHA1 as function call:")
+print("mqttClient.addServerFingerprint((const uint8_t[]){0x" + ", 0x".join([sha1[i:i+2] for i in range(0, len(sha1), 2)]) + "});")