Open Island

 From a boat utuber, it seems motor cycle android system is a pretty good solution for boater. some of them comes with android system 12-14, it means we can install apps we need. most of them are made in china, their map system is very different from others, so I turn to Aliexpress, their android system is the same as westen ones. This " EKIY M21 7 inch " it's water prppf at IP67, brightness is about 800 nit, with built in gps, and android 13. You can find some newer ones with larger screen and better function, I got this one with 71USD, and 3.2USD for shipping to TW, pretty good cost. shipping was very quick, package is light, no info about maker, no web site including gps antenna, power adapter is 12-24V in and 5V out with 3pins connector power: Yellow is the battery +, the red one is for key swiched power. This is the voltage measurement on the connector GND is direct connected to input GND(as most bulk converter) yellow is 5V, the upper 5V I guess: Is pull up to 5V fo...

 I seems to be able to work with sensorless BLDC at low speed, without position sensor. I got 2 of them: AM32电调/ESCape32电调/红隼电调PRO版 V2 6S at 70A can add on/off switch, selector for BEC voltage I ordered a AM32 version, but they send me a escape32 board. it did connect to AM32 win configurator. escape32 use CLI, so you need to run a CMD window in windows, and try to find the right com port. for example, my stuff show on windows as com3, then, it should be /dev/ttyS2 Connecting via ESCape32 CLI Utility with following command , I get the connection and got the data from ESC escape32-cli -d /dev/ttyS2 for firmware it would be escape32-update -d /dev/ttyS? firmware.bin As searching on net, there is a esp32 version wifi configuator, it use web on esp32 for configuration   A mini version: comes with a place to down load data: http://tools.freelyrc.com:8800/

 1. Lipo good for 5V out put with single cell lipo, no cut off when current is small. the type C is only for input charging, can't do uot put. But no turn off function. the switch only for wake up birght level indicate led, when no device connected. when out put power, the blue level indicate led always light up. 2. Life work with life, and can support small current, should not shut off aotomatic

 the charger is marked as 10.5V 3.8A but measure with meter, it shows 11.5V I was plan to use PD type C, but some charger does not provide 12V so , I have to set for 15V, if the charger only top 12V, it will delivery 12V. then use a DCDC to switch down to 11.5V The first I used is this small one, but it turn out very hot at about 2A load. so a larger module is necessary: with thing connected in a 3D print box, it does not save me much room... So, what for?