Blinking LED Circuit Design
帮我修复 U2 附近剩下的 GND airwire 和 floating copper
Worked for 1 min 2 sec
我已经修掉了 floating copper：DRC 现在不再报 floating copper，只剩 1 个 GND airwire，位置是 U1:GND ↔ J1:Pin4(GND)。这个 airwire 的含义就是原理图 GND 已经同网，但 PCB 上这两个焊盘之间还缺实际铜连接；按修复流程需要把它接到 GND 铜区或补一段 Top 层 GND 线，floating copper 则可以删除或接入 GND，我已完成删除孤立铜这一步 。
Updated 1 layout rule
Set Trace's active to "false"
检查修复
Worked for 2 mins 15 sec
我检查并修复了一轮：已确认 floating copper / overlapping copper / dangling trace 都清掉了，GND 铺铜仍在 Top，并把 GND keepout 调到 0.5 mm。复查后现在只剩 1 个 GND airwire：U1:GND ↔ J1:Pin4(GND)；我尝试移动 J1 来让铺铜自动连上，但会引入新的断线/重叠，所以已回退，按 DRC 修复流程 airwire 本质上仍需要补实际铜连接。
添加 GND 走线
检查 U2 网络
运行 ERC/DRC
查看 J1 连接
Updated 3 layout rules
Set GND's connectedLayers to "Top"
Set GND's keepOut to "0.5mm"
Set GND's preferredTraceWidths to "0.5mm 0.8mm 1.0mm"
Placed components
0:10
Placed 1 component(s): J1
Updated 1 layout rule
Set J1's position to "8.2072mm 22.46mm"
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Firmware GPIO Map
Smart weighing + vision recognition system
This project uses a Seeed XIAO ESP32-S3 as the controller for a Grove Vision AI V2 4-pin I2C interface, a simple 4-pin ESP32-S3 expansion interface, an RGB status LED module, and switched 3.7V LiPo input. There is no onboard HX711 module and no load-cell connector in this simplified schematic.
Power
Table
| Net | Connection | Notes |
|---|---|---|
| 3V3 | U1 3V3 to U2 3V3 and U3 pin 1 | Common 3.3V module rail |
| GND | U1 GND to U2 GND, U3 pin 4, RGB module pin 4, and LiPo negative | Shared return |
| LIPO_PLUS_UNSWITCHED | J2 pin 1 to S1 input | LiPo positive before switch |
| BAT_PLUS_SWITCHED | S1 output to J3 BAT+ pad | Solder/wire to XIAO ESP32-S3 BAT+ pad; the selected library symbol does not expose BAT+ directly |
MCU pin assignments
Table
| Function | Net | XIAO ESP32-S3 pin | Peripheral/interface pin |
|---|---|---|---|
| Vision I2C SDA | I2C_SDA_GROVE | D4 / GPIO5 | U2 SDA |
| Vision I2C SCL | I2C_SCL_GROVE | D5 / GPIO6 | U2 SCL |
| Expansion DT | DT_D2_GPIO3 | D2 / GPIO3 | U3 pin 3 |
| Expansion SCK | SCK_D3_GPIO4 | D3 / GPIO4 | U3 pin 2 |
| RGB blue | LED_B_D10_GPIO9 | D10 / GPIO9 | J1 pin 1 / B |
| RGB green | LED_G_D9_GPIO8 | D9 / GPIO8 | J1 pin 2 / G |
| RGB red | LED_R_D8_GPIO7 | D8 / GPIO7 | J1 pin 3 / R |
Connectors and modules
- U2 is the actual Grove Vision AI Module V2. Only 3V3, GND, SDA, and SCL are connected to the XIAO ESP32-S3; all other Grove/module pins are intentionally left unconnected.
- U3 is a 4-pin hand-solderable ESP32-S3 expansion header. Physical pin order from top to bottom: pin 1 3V3, pin 2 SCK to D3/GPIO4, pin 3 DT to D2/GPIO3, pin 4 GND.
- J1 is the 4-pin common-cathode RGB LED module connector with built-in resistors. Physical pin order from top to bottom: pin 1 B to D10/GPIO9, pin 2 G to D9/GPIO8, pin 3 R to D8/GPIO7, pin 4 -/GND.
- J2 is the 2-pin JST-PH LiPo connector: pin 1 LiPo+, pin 2 LiPo-/GND.
- J3 is the switched BAT+ solder pad/header for the XIAO battery pad.
Firmware notes
- Configure I2C on GPIO5 SDA and GPIO6 SCL for the Grove Vision AI V2 module.
- Treat GPIO3 and GPIO4 as the external expansion interface signals: DT on GPIO3 and SCK on GPIO4.
- Configure LED outputs on GPIO9 for blue, GPIO8 for green, and GPIO7 for red. The LED module is common-cathode with built-in resistors, so drive the corresponding GPIO high to turn a channel on.
- GPIO7/GPIO8/GPIO9 are shared with the XIAO D8/D9/D10 SPI-labeled pins, so avoid using SPI on these pins at the same time as the RGB LED outputs unless the hardware is revised.
- Initialize LED outputs to a known low/off state early in firmware startup.
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