small updates

platformio.ini-example

@@ -0,0 +1,33 @@
+[platformio]
+env_default = nodemcuv2
+#env_default = d1_mini
+
+[common]
+platform = espressif8266
+build_flags = -g -DMQTT_MAX_PACKET_SIZE=300
+build_flags_custom = '-DWIFI_SSID="<my_ssid>"' '-DWIFI_PASSWORD="<my_password>"' '-DMQTT_IP="<broker_ip>"' '-DMQTT_USER="<broker_username>"' '-DMQTT_PASS="<broker_password>"' 
+lib_deps =
+  Time
+  PubSubClient
+  ArduinoJson
+  Ticker
+
+[env:nodemcuv2]
+board = nodemcuv2
+platform = ${common.platform}
+framework = arduino
+lib_deps = ${common.lib_deps}
+build_flags = ${common.build_flags} ${common.build_flags_custom}
+upload_speed = 921600
+; comment out next line if using USB and not OTA
+upload_port = "boiler."
+
+[env:d1_mini]
+board = d1_mini
+platform = ${common.platform}
+framework = arduino
+lib_deps = ${common.lib_deps}
+build_flags = ${common.build_flags} ${common.build_flags_custom}
+upload_speed = 921600
+; comment out next line if using USB and not OTA
+upload_port = "boiler."