- On board 0.91” OLED, 128×32 pixels, configure as IIC interface, drive by SSD1306. Color Blue.
- On board AT24C02 small size EEPROM (256 bytes), can save a few data for user
- On board DS1307 RTC clock, with backup battery holder.
- On board logic shifter and 5V-3.3V regulator, can use 5V logic and power supply, or 3V group logic and power supply.
- Reserved DS18B20 temperature sensor socket, output to DQ pin.
- Two groups of 3.3V, GND, SCL, SDA IIC interface, cascadable design, can connect as many IIC devices as you want.
- Interface:
- two groups pins: 3.3V GND, SCL, SDA (3.3V logic)
- DQ, SQ, BAT pin: DS18B20 one wire output pin DQ, DS1307 time output pin SQ, DS1307 backup battery pin BAT.
- 5V GND, SCL SDA (5V logic). LDO supply up to 500mA/16V.
- Read write EEPROM, print data to OLED demo sketch here. Schematic see here.
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