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RoomMonitor

Software/firmware for DYI room conditions monitor.

  • ESP8266 wifi connection & brain
  • SHT30 or SHT21 - temperature and humidity sensor
  • BMP280 - atmospheric pressure sensor (optional)
  • BH1750 - light intensity sensor.

All sesnors communicate via I2C bus. Data are sent to a MQTT broker.

2 prototypes and the actual PCB version

PlatformIO is used to build this project but it should be easy to convert it back to a project for Arduino IDE.

More information can be found in this series of blog posts:

There is also another projects for a remote MQTT display for measured data:

Flashing the device

Config

  • change the name of the room in config.h
  • setup IP and port for MQTT server in main.cpp
const char mqttServer[] = "192.168.178.31";
const int mqttServerport = 1883; 
  • setup IP for the device and network details in main.cpp
IPAddress ip(192, 168, 178, 51);
IPAddress gateway(192, 168, 178, 1);
IPAddress subnet(255, 255, 255, 0);

First flash

  • use the programming breakout J1 on the board
  • check the layout in the schematic
  • hold PRG button and pres RST to get into programming mode

OTA

You need to know IP of the device.

Setup in platformio.ini as this:

platform = espressif8266
board = esp12e
framework = arduino
upload_protocol = espota
upload_port = 192.168.178.51
  • Restart the device and press shortly PRG after restart. The device will switch into "waiting for OTA" mode.
  • Run upload through platformio.

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Software for esp8266 based iot room monitor

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