Hi po, first time mag-Arduino — bakit hindi nag-uupload yung sketch ko?

[jana_davao]

Newbie po dito, sorry kung obvious yung tanong haha

Bumili ako ng Arduino Uno + breadboard kit last week para sa intro course namin. Sinunod ko po yung tutorial for LED blink — nilagay ko yung LED with 220Ω resistor sa pin 13. Pero pag i-upload ko yung sketch sa Arduino IDE, ito po lumalabas:

Code: Select all

avrdude: stk500_recv(): programmer is not responding

Naka-USB naman po siya, may red LED na nag-light up sa board. Selected ko na rin po yung tamang port (COM3) at "Arduino Uno" sa Tools → Board.

Naka-stuck po ako buong gabi. May tip po kayo? Salamat in advance!

[mark_ee_qc]

Welcome sa "the hardware is fine, it's always something else" club haha. Yung error mo, IDE failing to talk to the bootloader. Karamihan ng cause:

1. CH340 driver missing — most cheap Uno clones use a CH340 USB-serial chip imbes na yung genuine ATmega16u2. Hindi laging auto-install yung Windows. I-search "CH340 Windows driver", install, restart, try uli. Ito ang sanhi mga 70% of the time.
2. Wrong board variant — try "Arduino Nano (Old Bootloader)" pati "Arduino Uno". Minsan yung clones ibang variant talaga.
3. COM port hijacked — close anything else na bukas using COM3. PuTTY, another IDE instance, kahit Bluetooth utilities minsan inaagaw yung port.
4. Hold reset (last resort) — pindutin yung reset button while clicking Upload, release after compile finishes. Pinipilit yung bootloader window.

CH340 driver muna i-try mo. Hindi obvious yung issue na yan kasi mukhang OK naman yung wiring side.

[tito_elmer]

Ay sayang, ang dali-dali nang mag-Arduino ngayon. Noong panahon ko, parallel-port programmer at AVRDUDE manually pa. Tatlong oras pa ako mag-troubleshoot ng same kind of error.

Tama si Mark — CH340 driver yung first thing to check. Pero may isa pa akong tip na hindi pa nababanggit:

Tanggalin mo lahat sa breadboard. Pag may jumper wire na touching pin 0 (RX) or pin 1 (TX), nakakasagabal sa USB-serial communication — yung pareho na pin yung ginagamit ng bootloader. Iwan mo lang yung USB cable, try uploading. Pag gumana, ibalik mo yung components in this order:

1. Upload sketch first
2. Disconnect USB
3. Connect external components
4. Reconnect USB

Iyan yung classic mistake na isang taon ko ring na-stuck dati. Bago mo i-blame yung software, alis muna lahat sa breadboard.

[circuitrocks]

+1 sa lahat ng above. Naabot na ni Mark and ni Tito yung main culprits.

Pag stuck ka pa rin after CH340 driver + breadboard cleanup, palitan yung USB cable. Minsan data-only / charging-only yung cable, hindi mag-carry ng upload signal. Yung mga Uno kits na binebenta namin may kasamang tested cable para hindi ito mangyari.

One more — kung mag-fail pa rin, post mo dito yung exact model number na nakaprint sa board (look for "ATmega328P" near the chip, plus any "REV3" markings). May targeted advice pa kaming pwede ibigay base sa exact variant.

Wag mo bibitawan — almost always something simple lang. Once madaanan mo ito, blink LED becomes the easiest part.