In this project i will hack the Maisto Rock Crawler RC car attaching a Raspberry Pi to it.
You can finally access the Rock Crawler through its own WebInterface that gives you the following features:
- Steering using sliders
- See where you are driving using the Raspberry Pi camera
- ... more to come
The project just started so I'm currently figuring out how the internal PCB of the car works.
Since I couldn't find something on the internet about this PCB I just grabbed my multimeter and found out on my own:
| Pin | Function |
|---|---|
| GND | Ground |
| VCC | 6V from battery pack |
| Ant | Antenna |
| M1 | Motor for forward and backward driving (one on the front axis and one in the rear) |
| M2 | Steering motor (only front axis) |
| a | If steer left: 3V, else 0V |
| b | If steer right: 3V, else 0V |
| c | Drive backwards: 3V, else 0V |
| d | Drive forwards: 3V, else 0V |
| RF_sel | Channel A: both 3V, Channel B: white 3v green 0v, Channel C: white 0v green 3v |
##Voltages M1
Driving forwards:
(M1-) ---- (-6V) ---- (M1+)
Driving backwards:
(M1-) ---- (6V) ---- (M1+)
##Voltages M2
Steering left:
(M2-) ---- (-2V) ---- (M2+)
Steering right:
(M2-) ---- (2V) ---- (M2+)
##Hacking the control In order to control the car you just need to bridge a, b, c or d with the 3V pin shown in the picture below.
| Pin | Function |
|---|---|
| a | Steer left |
| b | Steer right |
| c | Drive backwards |
| d | Drive forwards |
