First Robot

[Ocracoke]

Are you able to recommend a 3/4 channel transmitter?

As I mentioned in my last post, a OrangeRX transmitter would do the job here. Alternatively (and this is the one I have use with Shu! before), a FlySky TX/RX works fine as well.

The batteries you linked to are... OK but for reference, Shu! uses a 3S 9.9v 1500 milliamp LiFePO4 battery for the battery and a separate battery of the same specification for the weapon. Technically, this means the robot is running under volts as the motors are 12v but I've not had any issues in capacity with them.

Is that ESC suitable to do motors and servo?

The Sabretooth will run the drive motors. Personally, I wouldn't use a servo as the draw on those through the receiver might cause issues but the flip side is that if you use a servo, you don't need a weapon ESC.

What is the basic wiring for a robot, including weapon?

Below is a basic diagram of a drive system ESC where it assumes you have two separate ESCs, one for each drive wheel and the mixing is handled elsewhere. The weapon circuit in Shu! is literally half of this.

basic_robotics_diagram.png

If you did get a ESC that has mixing on it, such as the Sabretooth or similar, you'd only have the one ESC in that diagram as above linked to the two motors.