pgreendale / d1_bmp280_mqtt

ThermoDude - Wemos D1 Mini MQTT Temp Sensor with BMP280 and OLED Display

This is just put together from some tutorials Randomnerdtutorials, works well enough to have some cheap sensors flying around. I use these modules together with Mosquitto and NodeRED in a Raspberry Pi 3 for temperature monitoring at home.

Application example

Circuit

Circuit overall

Required Hardware

• Wemos / Lolin D1 Mini or equivalent D1 example
• BMP280 Temp + Pressure Sensor BMP280 Breakout example
• 128*64 OLED Display, better use Adafruit to support the Company Oled Display example
• Case, 3D printed Thingiverse, NodeMCU V3 Case

Required Software

• ESP ESP Arduino Libraries
• Pubsubclient library pucsubclient
• BMP 280 Library DFRobot_BMP280
• OLED Display Library (Adafruit Oled Library)[https://github.com/adafruit/Adafruit_SSD1306]

How to proceed?

• Get components, put them together as shown in circuit
• Install arduino framework and needed libraries
• Edit code, you'll need to put in your wlan ssid and password and your mqtt IP which needs to be in reach within network , change MQTT device ID and Topic
• compile, upload

Troubleshooting

• some oled display have a different base address
• I experienced some issues during uploading new firmware while the program is running, caused by messages on the serial port
  • try it again in between 2 MQTT messages, shortly after temperature update