In a similar vein, the developer of the Anduril open source flashlight firmware[0][1] once investigated loading settings via light flashed from the phone using

In a similar vein, the developer of the Anduril open source flashlight firmware[0][1] once investigated loading settings via light flashed from the phone using the flashlight's LEDs as photodiodes [0] https://code.launchpad.net/~toykeeper/flashlight-firmware/anduril2 https://code.launchpad.net/~toykeeper/flashlight-firmware/an... [1] UI diagram: https://budgetlightforum.com/node/76941 https://budgetlightforum.com/node/76941