Raspberry Pi model Pi Zero W based
up to 8h of battery life (*)
bluetooth low energy (BLE)
equipped with high precision GPS MTK3339 (**)
high precision barometer, thermometer and altimeter Bosch BMP280
PiTFT 2.8" colour touch screen
easily editable layouts in YAML

Arduino based bike system analyzing the state of the bike - acceleration, stop, turn direction. Sharing information that may be relevant to other traffic participants can improve traffic flow and safety.