Question housing

[sandmen]

Hi, is there a power switch for the battery in the housing ? Or, how to switch off the Bike-Computer ? Thanks

[euphi]

There is space for a switch, but I connected before USB-C power supply, so battery is always connected.

Software has a deep-sleep-button in the Settings screens (longpress on clock). Wakeup is by Touch. I choose this solution to keep the ULP and thus RTC running.

There are several drawbacks with this:

• T-RGB electronics provides power from battery to USB-C even in deep-sleep. (So the extra ESP32 to convert Forumslader Classic bluetooth to BLE is kept on, if battery voltage is high enough).
  • Solution: connect the second ESP32 before the switch.
• Touch can switch on T-RGB unintentionally.
  • Workaround: Auto-Deep-Sleep if no external power supply
  • Solution: Use boot-button for wake-up. I tried, but display (backlight) is not initialized correctly when I do so. (needs further investigation). This would also need a button extension in the housing (this is feasible).
• RTC is extremely unaccurate (several minutes per day depending on external influences (temperature, voltage etc.) so you cannot calibrate for the drift.)
  • Solution: Use different clock source (Internal 8.5 MHz oscillator). However, this is fixed in the Arduino-ESP32 and I was not able to compile (link) with own Espressif IDF configuration yet.