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1. Power Connections:
   • Ensure that all necessary power pins such as 3.3V and GND are connected properly.
2. Required Components:
   • Confirm that all mandatory pins for the ESP32-S3 module, such as EN (Enable), IO0 (Boot), and others required for functionality, are set up correctly.
3. Pin Assignments/Connections:
   • Verify that all pin assignments are correct and match the intended design requirements.
4. Antenna Connection:
   • Make sure the U.FL antenna connector on the ESP32-S3 module is properly accounted for if required.

• 3V3: Ensure all 3.3V power pins are connected to a stable 3.3V source.
• GND: All ground pins should be connected to a common ground.

• EN: Typically connected to a pull-up resistor to 3.3V and might include a capacitor to ground to avoid noise issues.

• RXD0 and TXD0: Should be connected to your UART interface for programming/debugging.

• Make sure you're providing an external antenna via the U.FL connector if required, as it's not included with the module.

• Power:
  • Connect $3V3$ to a 3.3V power source.
  • Connect all GND pins ($GND$, GND__2, GND__3, etc.) to a common ground.
• Basic Components:
  • Connect $EN$ to a pull-up resistor (typically 10kΩ) to 3.3V and a 0.1µF capacitor to ground.
  • Connect $RXD0$ to the TX of your UART programming tool.
  • Connect $TXD0$ to the RX of your UART programming tool.

• You might have additional connections or components not listed here, ensure to include those as needed.
• If using additional peripherals such as sensors or modules, make sure their power and signal connections are accurate.

copilot

1. 1 x ESP32-S3-WROOM-1U-N8R2
2. 4 x MAX31865

• The ESP32 will use IO19 as MISO, IO23 as MOSI, IO18 as SCLK, and additional GPIOs for CS (chip select).
• The 3.3V and GND pins of the ESP32 will be used to power the MAX31865 ICs.
• The MAX31865 will communicate using the SPI interface.
• Pull-up resistors for SPI lines are internal or otherwise managed.

• MISO: IO19
• MOSI: IO23
• SCLK: IO18
• CS1-4: IO4, IO5, IO13, IO14

• VCC: 3.3V
• GND: GND
• SCLK: SCLK
• SDI(MOSI): MOSI
• SDO(MISO): MISO
• CS: CS1, CS2, CS3, CS4

• Connect ESP32 $3V3$ to each MAX31865 VCC
• Connect ESP32 $GND_{2}$, $GND_{3}$, etc. to each MAX31865 GND

• Connect ESP32 $IO18$ (SCLK) to each MAX31865 SCLK
• Connect ESP32 $IO23$ (MOSI) to each MAX31865 SDI
• Connect ESP32 $IO19$ (MISO) to each MAX31865 SDO

• Connect ESP32 $IO4$ to MAX31865 CS1
• Connect ESP32 $IO5$ to MAX31865 CS2
• Connect ESP32 $IO13$ to MAX31865 CS3
• Connect ESP32 $IO14$ to MAX31865 CS4

• Connect VCC and GND of each MAX31865 to 3.3V and GND of ESP32 respectively.
• Connect SCLK of each MAX31865 to IO18 of ESP32.
• Connect MOSI (SDI) of each MAX31865 to IO23 of ESP32.
• Connect MISO (SDO) of each MAX31865 to IO19 of ESP32.
• Connect CS of each MAX31865 to different GPIO pins: IO4, IO5, IO13, IO14.

vitriltd

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• U1 (MAX31865_1)
• U2 (MAX31865_2)
• U3 (MAX31865_3)
• U4 (MAX31865_4)

• Connect [$3V3$]:(3V3):1 to U1:VCC, U2:VCC, U3:VCC, and U4:VCC
• Connect [$GND$]:(GND):1 to U1:GND, U2:GND, U3:GND, and U4:GND
• Connect $GND\_2$:1, $GND\_3$:1, $GND\_6$:1, $GND\_9$:1, $GND\_7$:1, $GND\_4$:1, and $GND\_5$:1 in common GND net for all MAX31865 GND pins.

• Connect [$IO18$]:(IO18):1 (SCLK) to U1:SCLK, U2:SCLK, U3:SCLK, and U4:SCLK
• Connect [$IO23$]:(IO23):1 (MOSI) to U1:SDI, U2:SDI, U3:SDI, and U4:SDI
• Connect [$IO19$]:(IO19):1 (MISO) to U1:SDO, U2:SDO, U3:SDO, and U4:SDO

• Connect [$IO4$]:(IO4):1 to U1:CS
• Connect [$IO5$]:(IO5):1 to U2:CS
• Connect [$IO13$]:(IO13):1 to U3:CS
• Connect [$IO14$]:(IO14):1 to U4:CS