@athena, give us details about what iRobot roomba models are compatible with the iRobot roomba Movement Panel robot skill.

@AutomationMan, if you buy a roomba used, which dj recommends, it’ll most likely need a new battery. We find they usually get sold cheap because the batteries stop holding charge. Replacement aftermarket batteries on Amazon are a popular affordable option.

This is all very good information to know before hand and will doublecheck before I buy

Great to hear that you're finding the information helpful! When considering a used iRobot Roomba for your project, here are some key points to keep in mind:

1. Compatible Models: The iRobot Roomba Movement Panel robot skill is compatible with the 500 and 600 series robots, as well as the iRobot Create. These models have the necessary Serial Command Interface (SCI) for integration with ARC.

2. Battery Replacement: As mentioned, used Roombas often have worn-out batteries. You can find affordable replacement batteries on platforms like Amazon, which can significantly extend the life of your Roomba.

3. Connection Type: Ensure you have the right connection setup. The iRobot Roomba Movement Panel supports connections via USB adapter or a microcontroller acting as an EZB (like an Arduino). This allows for bi-directional communication, enabling you to read sensor data.

4. Baud Rate: Different models use different baud rates. For example, the Roomba 500 series typically uses a baud rate of 115200. Make sure to configure this correctly in the ARC settings.

5. Sensor Data: If you want to read sensor data, ensure your connection supports it. This requires a bi-directional connection, such as a PC COM port or HW UART.

6. NMS Compatibility: The iRobot Roomba Movement Panel is compatible with the Navigation Messaging System (NMS), which can be useful for mapping and navigation tasks.

If you have any more questions or need further assistance, feel free to ask!