arduino_uno

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Arduino Uno

A microcontroller based around the ATmega328P chip.

With a 10-bit ADC over an operating range of 0–5V, the analog input pins have a resolution of 4.9mV.

It appears from the documentation that the serial pins (0 and 1) are internally connected to the USB interface [1]. In order to use both USB and another serial device, the SoftwareSerial library is necessary. In any case, serial operation is at TTL levels (not RS-232).

Pins A4 and A5 can also function as I2C SDA and SCL, respectively. The Wire library expects 7-bit addresses, so if given an 8-bit address, drop the least significant bit. Note also that the I2C buffer is 32 bytes [2].

References

[1] https://www.arduino.cc/reference/en/language/functions/communication/serial/
[2] https://www.arduino.cc/reference/en/language/functions/communication/wire/
  • arduino_uno.1671327959.txt.gz
  • Last modified: 2022-12-18 01:45
  • by asdf