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Re: Roborio RS-232 port issue
Quote:
Originally Posted by sanelss
Edit:Looks like it's just an issue with the logic levels, the rs-232 port is not ttl compatible and needs a level shifter circuit. In my case since it's only 1 way communication I can just use an inverter and should work
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Yes RS-232 is +15V to to -3V. The arduino is TTL UART at 5V. Conjecture, use the UART on the MXP port. Also note that the dedicated I2c, MXP I2c pins, and MXP UART are all at 3.3V. Using a 3.3 volt arduino or Bi-directional I2c safe level shiftier is necessary for I2c.
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12-03-2015, 12:28
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