esp-clock

Clock with ESP8266 and OLED display. It shows time, outside temp and inside temp with SSD1306, ESP8266 and DS18B20.

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HW used

• Esp01s
• 5V -> 3V3 converter
• SSD1306 128x64 (you can use other display, but you have to customize the positions of entities)
• DS18B20
• 4k7 resistor
• 2x 10 uF caps
• LM7805

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Setup

WiFi

Edit lines 12 & 13 and set your WiFi connection:

#define SSID "Your SSID"
#define PASSWORD "Your password"

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Outside temp

Register on openweathermap.com, get API key and change line 14:

#define APIKEY "Your API key"

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Your location

OpenWeatherMap has many methods to get your location. I am using my ZIP code, but you can use for example GPS coordinates, city or state name. To set zip code, edit line 15:

#define ZIPCODE "Your ZIP code"

If you want to use custom method, edit line 40:

http.begin("http://api.openweathermap.org/data/2.5/weather?zip=ZIPCODE,cz&units=metric&APPID=APIKEY");

OpenWeatherMap documentation: https://openweathermap.org/api

Time

Edit line 16 to set your timezone.

#define TIMEOFFSET "Your time offset"

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Issues

• Some OLED displays have non-standard addresses. For example my is 128x64 and it should have 0x3D address, but it has 0x3C. Try to determinate your address. It is not my fault.

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Libraries

• https://github.com/bblanchon/ArduinoJson
• https://github.com/esp8266/Arduino
• https://github.com/ThingPulse/esp8266-oled-ssd1306
• https://github.com/PaulStoffregen/OneWire
• https://github.com/milesburton/Arduino-Temperature-Control-Library
• https://github.com/arduino-libraries/NTPClient