SendPin

SendPin is a companion app for the Hammerhead Karoo, a cycling GPS computer. It sends a destination from the iPhone to the Karoo over Bluetooth Low Energy: the iPhone advertises a custom BLE service holding the destination in a GATT characteristic, and a Karoo-side extension — built on Hammerhead's own officially supported third-party extension framework (karoo-ext) — reads it and hands the coordinates to the Karoo's built-in navigation. PURPOSE AND TARGET AUDIENCE The audience is cyclists who own a Hammerhead Karoo and want to search for a destination using their phone rather than the Karoo's own limited on-device search and keyboard. The problem: cyclists often want to find somewhere to go — a café, a shop, a place a friend recommended — while already out riding, especially somewhere unfamiliar. Doing that safely is hard: checking a phone one-handed while riding is dangerous, and a…