Uploaded February 2025 | Updated September 2026, 3 weeks ago
It's easy to dismiss the humble USB cable.
Why is the error problem - No serial data received, caused by USB power
00:00 The ESP32 sometimes uploads successfully, but more frequently encounters numerous Error Failed Uploading
00:12 In this case. The servo motor requires high current
00:20 Before uploading, unplug and replug the USB cable
00:34 ESP32 LED lights seem to flash
00:47 For high-current devices connected to an ESP32, use an external power supply
01:04 The ESP32 USB computer. Servo power from External Adapter
01:14 ESP32 LED lights seem to stable
01:50 One of the causes of an ESP32 error, Specifically
01:55 A fatal error occurred: failed to connect ESP32. No serial data received
02:00 Power USB computer drop
02:16 Now, no Error "No serial data received"
The ESP32 communicates with your computer via a serial connection over USB.
This connection is crucial for uploading code, monitoring serial output, and debugging your projects.
When the USB power drops, the ESP32 crashes and neither sends nor receives data
Troubleshooting the power USB Cable Issue:
Pay attention to the ESP32's LED. Does it blink when the connected device is active? If it blinks, the power is likely unstable, which can cause program upload failures and the "No serial data received" error message.
The first solution is to remove and reconnect the USB cable from the computer and the ESP32. However, this solution is only temporary.
The second solution is to change the power source for the ESP32. Power the ESP32 only from the computer's USB port when uploading the program.
It's easy to dismiss the humble USB cable.
Why is the error problem - No serial data received, caused by USB power
00:00 The ESP32 sometimes uploads successfully, but more frequently encounters numerous Error Failed Uploading
00:12 In this case. The servo motor requires high current
00:20 Before uploading, unplug and replug the USB cable
00:34 ESP32 LED lights seem to flash
00:47 For high-current devices connected to an ESP32, use an external power supply
01:04 The ESP32 USB computer. Servo power from External Adapter
01:14 ESP32 LED lights seem to stable
01:50 One of the causes of an ESP32 error, Specifically
01:55 A fatal error occurred: failed to connect ESP32. No serial data received
02:00 Power USB computer drop
02:16 Now, no Error "No serial data received"
The ESP32 communicates with your computer via a serial connection over USB.
This connection is crucial for uploading code, monitoring serial output, and debugging your projects.
When the USB power drops, the ESP32 crashes and neither sends nor receives data
Troubleshooting the power USB Cable Issue:
Pay attention to the ESP32's LED. Does it blink when the connected device is active? If it blinks, the power is likely unstable, which can cause program upload failures and the "No serial data received" error message.
The first solution is to remove and reconnect the USB cable from the computer and the ESP32. However, this solution is only temporary.
The second solution is to change the power source for the ESP32. Power the ESP32 only from the computer's USB port when uploading the program.
