I hope to connect multiple Pixhawk autopilots to one PC, to establish a simulation system. In case you are unfamiliar with Pixhawk autopilot, here is a brief introduction:
Pixhawk autopilot is an STM32F4 based controller for unmanned aerial vehicles. It is equipped with interfaces including UART, CAN, SPI, I²C, et al.
Now I have up to 50 Pixhawks, and I want to connect them with one PC. The data transmission between Pixhawk and PC needs to satisfy:
- Each Pixhawk sending data @6.4 kbit/s and receiving data @25.6 kbit/s, at least.
- The PC needs to distinguish who the sender is, i.e. to distinguish which Pixhawk sent a certain datagram.
Since the add-on development of Pixhawk is hard, I am not going to use the CAN or I²C interface of the Pixhawk. My plan is, to add another chip or board between a Pixhawk and PC, just like:
So, my question is:
- What chip should I choose to finish this task?
- Is the UART communication between Pixhawk and the chip okay?
- What kind of bus should I choose?