USB-C Sensor Node
Thought for 35 sec
Thought for 23 sec — Assessing wire connections
Reading schematic details for J1, U1, U2 and 8 more.
Thought for a moment
Considering debug options
I'm thinking about the UART ISP on GPIO_8/9 not being connected for debugging. Maybe we could add test points, but right now we don’t have any. I'm considering using J2 pins 7/8 instead, but I wonder if SWD would be enough as it typically suffices for debugging. Skill suggests including UART updates, and datasheet backs that up. I’ll probably go with J2 pin 7 for UART_TX and pin 8 for UART_RX instead of using TDI, since SWD might cover it.
Evaluating GPIO Connections
I’m considering wiring for the U1 pins and determining which should be set to "no connect." The pins I've used include JTAG_TMS, JTAG_TCK, GPIO_8, and others. I need to list all unused GPIO that should not connect, possibly including the RF pins for the built-in antenna. I’m also thinking about the USB connector pins and whether certain capacitors might be necessary. Should I mark OUT2 as NC and remove C8 if LDO is disabled? I'll need to check the datasheet as well.
Considering pin configuration
I want to avoid a single-pin output, but using a capacitor could be okay. I’m thinking if CTRL4
shorter
I want to design a compact PCB for my NCS wearable monitoring system using an ESP32, AD8232 ECG, MAX30102 PPG, MPU6050 IMU, FSR pressure sensor, and microSD module. Use GPIO34 for ECG output, GPIO32/33 for LO+/LO−, GPIO21/22 for I2C, GPIO35 for FSR, and GPIO5/23/19/18 for microSD SPI. Power the system using a 3.7 V Li-Po battery with TP4056 charging, an ON/OFF switch, and a suitable voltage regulator. Please verify all connections and power requirements, add necessary protection/filtering components, minimize ECG noise, and create the schematic and compact 2-layer PCB layout.
Thought for 3 sec
No changes were made to the NCS wearable design. The current project still contains parts from the earlier USB‑C Wi‑Fi/BLE sensor concept.
Remaining: create and verify the ESP32 wearable schematic, Li‑Po charging/protection and regulation, ECG filtering/noise controls, then place and route the compact 2‑layer PCB. Execution is currently unavailable because your account has no ACUs.
Update project to wearable
Verify power budget
Create compact schematic
Add protection and filtering
Lay out 2-layer PCB
