from the lib
x = uint8_t TwoWire::endTransmission(void)
- Output 0 .. success
- 1 .. length to long for buffer
- 2 .. address send, NACK received
- 3 .. data send, NACK received
- 4 .. other twi error (lost bus arbitration, bus error, ..)
from the lib
x = uint8_t TwoWire::endTransmission(void)