eChook was founded to design and develop data logging and telemetry systems specifically aimed at the competitors in the Greenpower STEM racing series. An Arduino powered PCB connects to sensors around the car. Collected data is sent to an Android app over Bluetooth for display and logging. It can then be uploaded over the phones data connection for near real-time viewing in the pits. All designs are open source and backed up by comprehensive documentation. The low cost system is sold in kit form through the Greenpower shop with 100% of profit going to the Greenpower Education Trust.