I try to modify the configration parameter. Now it run well.
make menuconfig
Component config --->
Bluetooth --->
Bluedroid enable --->
Include GATT server module(GATTS) = cancel
BT/BLE MAX ACL CONNECTIONS(1~7) = 7
BT/BLE will first malloc the memory from the PSRAM = enable

Environment Development Kit: ESP32-Devkitc_V4 IDF version: ESP-IDF v3.1.2 Development Env: Make Operating System: Window 7 Power Supply: external 3.3V Problem Description I try to modify the example code of "gattc_multi_connect". I hope that it can be used to connect to seven GATT servers at the sam...

So when the esp32-devkitc-v4 board burns, must it press the boot button. No way to automate?

I have used this method, but it is not convenient.And I tried 10 pieces of it all.
I suspect that there is a problem with esp32-devkitc-v4's programming circuit design.
Because the same method is used on other brand boards, it is normal.
Are there other ways or suggestions for improvement?

I used win7+msys32 to work. I am a novice. I try simple example with esp32-devkit board. first connect usb cable and run "make menuconfig" to setup serial port(COM20). Then run "make flash" to build and burn flash.But got fail. The message as attached file. Sometime I click boot button when appear C...

I want to make flash my code to esp32_devkitc_v4 board. But appear the following error.
"A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header"
What happened?