The only way I get them to compile is to delete the ArduinoBLE library

testing using Arduino IDE 2.3.2, boards manager esp32 by Espressif ver. 3.0.2 and lower, ESP32C3 and other modules, win 11... Selecting file > examples>examples > custom libraries > ESP32 BLE Arduino > BLE client loads sketch client.ino Compiling gets: Many errors ending in Compilation error: 'BLEUU...

Thank you lbernstone
Yes, it is so obvious now.
I cut and pasted from the lines above and did not change putString to getString!

Thanks again.

Case closed

/* Using this page as a guide https://randomnerdtutorials.com/esp32-save-data-permanently-preferences/ the following code prints the following to the serial monitor: data saved 5 5 why does it not print? hello world */ #include <Preferences.h> Preferences preferences; const char* line1 = "hello"; co...

Update: All of the above tests were conducted on a protoboard. Then I soldered the capacitor (same as the one in the original tests) from EN to GND and all worked fine on both boards and at all baud rates. Bottom line: 1. Buy boards with the capacitor built in - good luck with that! 2. Never fully t...

Sorry, but I do not know what "idf.py" is or how it is used. At 115200 baud (in the sketch and monitor), what I am getting is strange characters like: %⸮FE⸮e%JJj⸮+⸮ѥ⸮⸮A or: rst:0x1 (POWERON_RESET),boot:0x0 (DOWNLOAD_BOOT(UART0/UART1/SDIO_FEI_FEO_V2)) waiting for download At 9600 baud, I get ⸮@t⸮⸮⸮⸮$...

My setup: Arduino IDE 1.8,12, Win10 64bit I have two Geekcreit ESP32 dev boards purchased from Banggood. There are no docs. Only ID on board is "2024" First problem was booting, which was fixed with 10uF cap from EN to gnd. Second problem was printing 'hello world" to serial monitor. All I get is ga...

Update: I was using ver. 1.2 of the library. Updated to ver. 1.13 and all works as expected.

Thank you Tinker and Sprite. Still no joy yet. This library was written in 2016 by JeeLabs (aka J.C. Wipple) who usually does good work. I am just a hobbyist and certainly not a geek, but it seems that the problem lies with some conversions or interpretations between the Arduino IDE and the ESP32 de...

Sketch is RTClib > ds1307 which does date and time functions using a DS1307 RTC connected via I2C and Wire lib After compiling, I get: Arduino: 1.8.12 (Windows 10), Board: "ESP32 Dev Module, Disabled, Default 4MB with spiffs (1.2MB APP/1.5MB SPIFFS), 240MHz (WiFi/BT), QIO, 80MHz, 4MB (32Mb), 921600,...