NTP clock with Adafruit 1.2" I2C display on ESP8266 in Micropython

This project uses submodules. Clone with git clone --recurse-submodules or git submodule init in each submodule directory.

• 1x esp8266 development board with USB - I used a nodemcuv2 variant
• 1x Adafruit 1.2" 4-Digit 7-Segment Display with I2C Backpack - there are a few color choices. Based on HT16K33 controller.
• 1x DHT-22 Temperature and Humidity Sensor
• 3x 10K resistors for pullups
• 1x old phone USB charger - to power it when it is on the wall

Pins are currently hardcoded

1. IO → 3V3
2. + → VIN (5V)
3. - → GND
4. D → D1 (Pin 5) + pullup resistor to IO or 3V3
5. C → D2 (Pin 4) + pullup resistor to IO or 3V3

1. VDD → 3V3
2. Data → D5 (Pin 14) + pullup resistor to VDD or 3V3
3. NC
4. GND → GND

• Install micropython to your board https://docs.micropython.org/en/latest/esp8266/esp8266/tutorial/intro.html
• cp config.json.example config.json and edit config.json to match your environment
• Upload the sources to the device - load.sh is an example using ampy to load them over serial

• Configurable I/O Pins
• Improve MQTT configurability
• Improve DHT-22 configurability
• Make DHT-22 optional
• Improve localization (Timezone and DST offsetting)