Simple BLE scanner using clone of WeMos LOLIN32 Lite (Retired)

All output is dumped to the serial port, so it should work on any ESP32 dev board. BUILTIN_LET is on while scanning

A collection of HW info for this board can be found at https://github.com/markr1961/_ESP32_dev_board_docs in the Lolin32_Lite folder.

Based on https://github.com/espressif/arduino-esp32/tree/master/libraries/BLE/examples/BLE_scan

To configure the Arduino IDE to build and program ESP32 devices see https://docs.espressif.com/projects/arduino-esp32/en/latest/getting_started.html or follow the link from https://github.com/espressif/arduino-esp32 Board manager: https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json

Arduino board: "WEMOS LOLIN32-Lite" All other settings at default. Should work with "ESP32 Dev Module" but need to change the LED pin to 2. Board info: BN: Unknown board VID: 1A86 PID: 7523 SN: Upload any sketch to obtain it

WeMos has dropped the LOLIN32-Lite from their website. (Probably because of all the clones.) Internet Archive: https://web.archive.org/web/20191002041532/https://wiki.wemos.cc/products:lolin32:lolin32_lite

User LED is on GPIO22. DOIT ESP32 dev board V1 uses GPIO02 no user button.

Microcontroller ESP32-DOWDQ6 (single core) Operating Voltage 3.3V Digital I/O Pins 19 Analog Input Pins 6 Clock Speed(Max) 240Mhz Flash 4M bytes (T25S32) Length 5mm Width 2.54mm Weight 4g All of the IO pins run at 3.3V.

Battery Connector: PH-2 2.0mm Lithium battery interface: TP4054 or LT 500mA Max charging current

some of the clones have bad LiON charger chips. Video showing its replacement https://www.youtube.com/watch?v=a9f9vHjQSfQ

may have AMS1117 or low power ME6211