![Custom PCB with ESP32 WROVER: could not flash firmware in Arduino (boot mode problems) - ESP32 Forum Custom PCB with ESP32 WROVER: could not flash firmware in Arduino (boot mode problems) - ESP32 Forum](https://i.stack.imgur.com/YhqF0.png)
Custom PCB with ESP32 WROVER: could not flash firmware in Arduino (boot mode problems) - ESP32 Forum
![Amazon.com: Aokin ESP32 ESP-WROOM-32 Development Board 2.4 GHz WiFi and Bluetooth Dual Cores Microcontroller ESP-WROOM-32 Chip for Arduino NodeMCU, 2 Pcs : Electronics Amazon.com: Aokin ESP32 ESP-WROOM-32 Development Board 2.4 GHz WiFi and Bluetooth Dual Cores Microcontroller ESP-WROOM-32 Chip for Arduino NodeMCU, 2 Pcs : Electronics](https://m.media-amazon.com/images/I/71P0tkijw7L.jpg)
Amazon.com: Aokin ESP32 ESP-WROOM-32 Development Board 2.4 GHz WiFi and Bluetooth Dual Cores Microcontroller ESP-WROOM-32 Chip for Arduino NodeMCU, 2 Pcs : Electronics
![ESP32 Flash Encryption and Sec. Boot Keys Extraction #ESP32 #Encryption #PWN @LimitedResults « Adafruit Industries – Makers, hackers, artists, designers and engineers! ESP32 Flash Encryption and Sec. Boot Keys Extraction #ESP32 #Encryption #PWN @LimitedResults « Adafruit Industries – Makers, hackers, artists, designers and engineers!](https://cdn-blog.adafruit.com/uploads/2019/11/Untitled-51.png)