# JSON Schema
## Controller to Robot
| Field | Purpose | Possible Values |
| --------- | --------------------------------------- | --------------- |
| direction | Control Robot's movement direction | l, r, f, b, s |
| video | Switch video on or off | true, false |
| heartbeat | Ping robot to demand a heartbeat signal | time in milliS |
The s in direction is for stop

## Robot to Controller
| Field | Purpose | Possible Values |
| --------- | ------------------ | --------------- |
| heartbeat | Connectivity Check | time in milliS |
The time difference between the request and response signals will give us some measure of the connection strength/input lag.