The idea is to create an open source altimeter for skydiving. Currently the hardware is based on standard components connected with a custom pcb. So you can just order the pcb from JLCPCB and the rest of the parts from Aliexpress. The cost should be <50$ depending on the type of housing you choose.
- OTA firmware updates
- keep logbook on internal storage
- jump number
- exit altitude
- ff time
- deployment altitude
- cp time
- plane
- location
- date/time
- sync logbook via WiFi (Wishlist - needs a backend)
- sleep mode to save energy
- check pressure every xx seconds
- wake up on button press or climb detection
- date/time
- altitude
- climb rate
- time to altitude
- altitude
- numbers as big as possible on screen
- altitude
- descent rate
- ESP32 ( LOLIN D32 V1.0.0 - Aliexpress ~10$
- built in LiPo charger
- 2x BMP280 sensors Aliexpress (make sure to get the 6 pin version! Else you can't change the I2C address of the second sensor) ~2$
- 2.42" OLED SPI display Aliexpress ~20$
- 2.500mAh LiPo battery ~10$
- D3231 RTC module Aliexpress ~1$
- 3 buttons ~1$
- custom PCB
- 3D printed housing with wristmount
