| Pin Number |
Pin Name |
Description |
|---|---|---|
| 1 | Vpwr | Roomba battery + (unregulated) |
| 2 | ||
| 3 | RXD | 0 – 5V Serial input to Roomba |
| 4 | TXD | 0 – 5V Serial output from Roomba |
| 5 | DD | Device Detect input (active low) – used to wake up Roomba from sleep |
| 6 | GND | Roomba battery ground |
| 7 |
The RXD, TXD, and Device Detect pins use 0 – 5V logic, so a level shifter such as a MAX232 chip will be needed to communicate with a Roomba from a PC, which uses rs232 levels.
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