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Home automation with a nodemcu v3 via Telegram Bot

Bread board

Requeriments

Install

  • Install libraries: [CTBot] [UniversalTelegramBot] [Adafruit BME280] [Adafruit Unified Sensor] [Adafruit SSD1306] [NTPClient Fabrice] [ArduinoJson] (version 5.13.4 at the time of writing, not the last one because fails to compile!!) [WakeOnLan by a7md0 Version 1.1.6]
  • Follow instructions on how to create a Telegram Bot, via telegram bot BotFather or see examples insiee CTBot library
  • Rename file secrets.h_dist -> secrets.h changing all definitions
  • Connect nodemcu using usb to the computer
  • Configure Arduino Board to "nodeMCU v1.0"
  • Check on Board Manager that ESP8266 is versions 2.7,1
  • Select port (e.g. maybe /dev/ttyUSB0 on linux // maybe /dev/cu_.... on mac)
  • Upload Sketch to nodeMCU ¹
  • Open Serial Monitor
  • Test if messages are sent to the serial port and the OLED screen show information

Issues

¹ On linux maybe is needed to allow write permissions to the USB

sudo chmod a+rw /dev/ttyUSB0

Debug

Some information is sent to serial, so is it possible to check if the wifi is already connected, etc...

Telegram Bot

Example bot output

Telegram Bot

Customize icon, commands via BotFather

List of commands (commands must be lowercase):

motionon - Active motion on OVO
motionoff - Disable motion on OVO
temp - Get temperature of computers
pressure - Get pressure of computers
humidity - Get humidity of computers
altitude - Get altitude of computers
tempovo - Get temp inside cabin
weight - Weight inside cabin
position - Position of cabin
wolpc1 - Start computer PC1
wolpc2 - Start computer PC2

Web Page

Example

REST API

Created a JSON REST API to get weather information (no security!) Change "weather.local" or established hostName to ip if mDNS does not work

GET http://weather.local/api/v1/weather
GET http://weather.local/api/v1/relay/1/on
GET http://weather.local/api/v1/relay/1/off
GET http://weather.local/api/v1/relay/2/on
GET http://weather.local/api/v1/relay/2/off

GET http://192.168.1.46/api/v1/weather
GET http://192.168.1.46/api/v1/relay/1/on
GET http://192.168.1.46/api/v1/relay/1/off
GET http://192.168.1.46/api/v1/relay/2/on
GET http://192.168.1.46/api/v1/relay/2/off

Schema & Parts list

Schema

Schema nodemcu