Romeo BLE DFR0351 Error: Programmer Not Responding
Sean.Kinney 2026-01-24 04:52:32 284 Views1 Replies I just recieved a new Romeo BLE today and tried upload an .ino file to it and I keep getting an error message. Error: programmer is not responding Warning: attempt 1 of 10: not in sync: resp=0x00. I have tried 2 computers and half a dozen USB wires. I tried the wired on another arduino and was able to upload to them. Any advice? Is it possible the board is defective? I am at a loss.
I am selecting Arduino UNO as the board and the connected com port. I am using Arduino IDE 2.3.7
Hi,
Sorry about the upload errors with your new Romeo BLE.
If the Bluetooth module on the Romeo BLE is in communication/pairing mode, it hogs the serial port (the same port the Arduino IDE uses to talk to the main chip), causing the "not in sync" error. First, confirm the Bluetooth module is NOT in active/pairing mode .
Fix steps:
1. Short-press the BOOT button (Bluetooth firmware update key) on the board BEFORE uploading—this resets the Bluetooth module and frees up the serial port. 2. If it still fails, test with the older Arduino IDE 1.8.x (your 2.3.7 may have compatibility quirks).For persistent issues: email [email protected].
niu.yixuan 
