๐ ๏ธ MAKER GUIDEApr 18, 2026โขโฑ๏ธ 2 min readโข๐ณ๐ต Tested in Nepal
Hardware Protocol Debugging: Using USB Logic Analyzers for I2C, SPI & UART
Master microcontroller hardware debugging and decode digital communication packets on I2C, SPI, and UART lines using affordable USB logic analyzers.
๐ ๏ธ BILL OF MATERIALS (BOM)
Required Hardware & Component Checklist
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Estimated Total (4/4 items):
NPRย 2,400
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NPRย 950
NPRย 750
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NPRย 200
Hardware Protocol Debugging: Using USB Logic Analyzers for I2C, SPI & UART
Decode complex serial packets (I2C address ACK/NACK, SPI register transfers, UART baud rates) in PulseView using the 24MHz 8-Channel USB Logic Analyzer and Dupont test probe leads.
Hardware Bill of Materials:
- Logic Analyzer: 24MHz 8-Channel USB Logic Analyzer ARM FPGA Debugger
- Test Platform: Arduino Nano V3.0 Solderless
- Test Display: 0.91 inch OLED module blue OLED 128X32 GND-VCC-SCL-SDA
- Jumper Leads: 40pcs 20cm 2.54mm Female to Female Dupont Wire Jumper Cable
Circuit Pinout & Protocol Sniffing Connections:
| Logic Analyzer Channel | Target Microcontroller Pin | Sniffed Protocol / Bus Line |
|---|---|---|
| Channel 0 (CH0) | Arduino Nano Pin A4 (SDA) | I2C Serial Data Waveform |
| Channel 1 (CH1) | Arduino Nano Pin A5 (SCL) | I2C Serial Clock Line |
| Channel 2 (CH2) | Arduino Nano Pin D11 (MOSI) | SPI Master Out Packet Capture |
| Channel 3 (CH3) | Arduino Nano Pin D12 (MISO) | SPI Slave In Packet Capture |
| Channel 4 (CH4) | Arduino Nano Pin D13 (SCK) | SPI High-Speed Clock Bus |
| Channel 5 (CH5) | Arduino Nano Pin D10 (SS) | SPI Chip Select Framing |
| Channel 6 (CH6) | Arduino Nano Pin D1 (TX) | UART Serial Byte Packets (e.g. 115200 Baud) |
| Analyzer GND | Arduino Ground (GND) | Mandatory Common Reference Ground |
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