Processor board with 32MHz AVR AT Xmega256-A3 processor.
Form factor identical to Arduino UNO.
- Switch Mode Power Supply (SMPS). High efficiency and wide input power supply range 8-32V. Can supply up to 700mA of DC Power to the board’s 5V rail, which is also available on the Arduino power connector pins. Also used to generate system power 3.3V
- Lithium battery charger circuit MCP73831. Will charge 245mA into a 3.7V battery connected to the J2 battery connector. Charging power taken either from the on board SMPS power supply or from a connected USB port.
- 8 Power/Gnd connectors, Arduino style, 5V/700mA + 3.3V/100mA
- USB connector Mini-B. More robust than the brittle micro-usb connector
- ON/OFF soft power button S1. Will activate 3.3V system power from the Lithium battery.
- USB to UART serial converter CH340.
- Bluetooth BLE5 transceiver MDBT42Q-512k using high speed SPI (not UART) allowing up to 800 kbit/s “Over the Air” (OTA).
Bluetooth transceivers firmware is OTA upgradable.
- ESP8266 WIFI socket for model ESP-01
- SPI and I/O connectors positioned, Uno-style. (Note 1)
- On Board 128kByte of fast SPI RAM 23LC1024 (nice for display buffer shadowing etc.)
- RESET Button
- IMU/AHRS sensor unit BMO085 with built in sensor processing software. This is a very advanced device that adds a nine axis Accelerometer + Gyroscope + Magnetometer with built in sensor fusing.
- On board RTC Real Time Clock PCF2123 with battery backup (Note 2)
- Pressure and Temperature sensor SPL06-007
- PDI connector for XMEGA programming.
- SPI connector, 6pin Arduino style header.
- Six ADC inputs. Arduino style but 0-3.3V, and 12 bit instead of 10 bit resolution.
- Screw terminal input for a 10kohm NTC thermistor. Providing off-board temperature sensing.
- Micro flash card with full support for Bascom AVRDOS
- I2C and three extra UARTs are available on the Arduino ports Jlow and Jhigh
- CPU XTAL of 11.0592MHz allowing CPU to run on 11, 22 or 33MHz with no UART baud error.
- USB XTAL of 12MHz for exact USB speed.
- RTC XTAL of 32768Hz/20ppm. This will run forever as long as power is available from battery, USB or SMPS. RTC will run also when board is powered down by the soft power button S1
- Note 1. Observe that all I/O’s are 3.3V rather than >Arduino’s 5V. This may disqualify some Shields but many will work.
Note 2. RTC battery backup depends on external battery being connected.