I purchased a WeMos D1 CH340 WiFi Arduino with built in WiFi and Bluetooth using an onboard ESP-12F chipset. This is an ESP8266 based processor sold by LOLIN. I am trying to program it using the Arduino IDE. I have the board manager set up for the WeMos D1 R2 & Mini as the object board. I have been able to compile and run the Blink program, and have been able to compile and run a WiFi program where I can turn on and off an LED from a web browser, either on my PC or on my Android phone.

My ultimate goal is to create a stepper motor controller that I can run forward or backwards, and perhaps change the speed through and App on my Android phone using a Bluetooth connection. I have access to the MIT website for creating the phone App. I also have the shields needed to complete the project if I can get Bluetooth to work. I have tried many different libraries on the IDE with no success so far.

I tried to follow great example posted on the workshop

Introduction to ESP32 - Getting Started

that got the Blink and WiFi sketches working, but it fails on Bluetooth:

I have tried to compile a Bluetooth and a BLE notify program designed for the ESP32 board, (by Evandro Copercini updated by chegewara) but ran into difficulties. None of the libraries I have found include examples for my board, and when I try to adapt an example from the ESP32 board, I have problems with the "#include esp_xxx.h" files installed on my IDE. There are a large number of header files missing causing fatal compile errors. I have tried numerous compiles, adding the header files as they are found to be missing. I am not certain I am doing it right though.

When I find a file missing (e.g. esp_bt_main.h) I create a directory C:\Program Files\Arduino\libraries\esp_bt_main, then go to github.com and locate the missing file. I copy the file found into the directory and try to compile again. It gets further, but another file will be  missing. I continue the process, but finally I get an error for a header file called by some other header file:

C:\Users\Bob\My Documents\Arduino\libraries\ESP32_BLE_Arduino\src/FreeRTOS.h:14:10: fatal error: freertos/FreeRTOS.h: No such file or directory
14 | #include <freertos/FreeRTOS.h> // Include the base FreeRTOS definitions.
| ^~~~~~~~~~~~~~~~~~~~~
compilation terminated.
Using library ESP32_BLE_Arduino at version 1.0.1 in folder: C:\Users\Bob\My Documents\Arduino\libraries\ESP32_BLE_Arduino
Using library esp32-sdk-master in folder: C:\Program Files\Arduino\libraries\esp32-sdk-master (legacy)
Using library esp_gap_ble_api in folder: C:\Program Files\Arduino\libraries\esp_gap_ble_api (legacy)
Using library esp_err in folder: C:\Program Files\Arduino\libraries\esp_err (legacy)
Using library esp_compiler in folder: C:\Program Files\Arduino\libraries\esp_compiler (legacy)
Using library esp_bt_defs in folder: C:\Program Files\Arduino\libraries\esp_bt_defs (legacy)
Using library esp_gattc_api in folder: C:\Program Files\Arduino\libraries\esp_gattc_api (legacy)
Using library esp_gatt_defs in folder: C:\Program Files\Arduino\libraries\esp_gatt_defs (legacy)
Using library esp_bt in folder: C:\Program Files\Arduino\libraries\esp_bt (legacy)
Using library esp_bt_main in folder: C:\Program Files\Arduino\libraries\esp_bt_main (legacy)
Using library esp_gap_bt_api in folder: C:\Program Files\Arduino\libraries\esp_gap_bt_api (legacy)
Using library esp_bt_device in folder: C:\Program Files\Arduino\libraries\esp_bt_device (legacy)
Using library esp_spp_api in folder: C:\Program Files\Arduino\libraries\esp_spp_api (legacy)
Using library Blynk at version 1.2.0 in folder: C:\Users\Bob\My Documents\Arduino\libraries\Blynk
Using library esp_gatts_api in folder: C:\Program Files\Arduino\libraries\esp_gatts_api (legacy)
exit status 1
Error compiling for board LOLIN(WEMOS) D1 R2 & mini.
Invalid library found in C:\Program Files\Arduino\libraries\ESP32_BLE_Arduino: no headers files (.h) found in C:\Program Files\Arduino\libraries\ESP32_BLE_Arduino

I located the missing file FreeRTOS.h at github, but it seems to be structured differently. No matter where I try to copy it, it is not found on the next compile. It seems to be looking in a directory I am not allowed to access:

C:\Users\Bob\My Documents\Arduino\libraries\ESP32_BLE_Arduino\src/FreeRTOS.h:14:10:

Any suggestions? Am I totally off base here, or something?

Has anyone succeeded in getting this D1 board to work with Bluetooth?