ESP32 Troubleshooting Guide
Expert tips and interactive solutions for common ESP32 issues. From Wi-Fi connection problems to advanced debugging, we've got you covered.
Top ESP32 Troubleshooting Tips
- 🔌
Use a Data-Capable USB Cables
A very common issue is using a USB cable that only provides power and doesn't support data transfer. Make sure you're using a full data-capable USB cable, not a charge-only one.
Read more - 🛠️
Press the BOOT/EN Button During Upload
Some ESP32 boards require holding the BOOT button while uploading code, especially if auto-reset isn’t working reliably.
Read more - 🛠️
Install the Correct Board and Drivers
Ensure you’ve selected the correct ESP32 board in the Arduino IDE or PlatformIO, and that required USB drivers (e.g., CP210x or CH340) are installed.
Read more - ⚡
Use a Stable Power Supply
Unstable or weak power can cause brownouts and erratic behavior. Ensure your supply provides at least 500mA at 3.3V (or 5V if regulated onboard).
Read more - 🔍
Monitor Serial Output for Debugging
The Serial Monitor can reveal boot errors or crash logs. Always initialize with Serial.begin() and check the correct baud rate.
Read more - 📶
Verify Wi-Fi Credentials and Signal Strength
Typos in SSID or password are easy to miss. Also, weak signal or router settings (e.g., 802.11n-only) can prevent connection.
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Go to FAQESP32 Error Categories
WiFi Connectivity
USB and Flashing Issues
Power Issues
Flash and Boot Issues
Debugging and Monitoring
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Our interactive troubleshooting wizard will guide you through common ESP32 problems and their solutions, step by step.