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.

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:

• ESP8266 based room-conditions monitor, Part 1
• ESP8266 based room-conditions monitor, part 2: PCB

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

• Github project RoomMonitorClient
• blog post Freeform ESP8266 OLED MQTT client

• 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);

• 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

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.