From the datasheet for this module, here are the pin groups you asked for:
Bootstrap / strapping pins
These are sampled at power-up / hardware reset to set boot behavior and related configuration:
Table
Module pin
Signal name
GPIO
14
IO12 / MTDI
GPIO12
23
IO15 / MTDO
GPIO15
24
IO2
GPIO2
25
IO0
GPIO0
29
IO5
GPIO5
The datasheet specifically lists 5 strapping GPIOs and names them as GPIO0, GPIO2, MTDI, MTDO, and GPIO5.
Input-only pins
These are not general bidirectional GPIOs:
Table
Module pin
Signal name
GPIO
4
SENSOR_VP
GPIO36
5
SENSOR_VN
GPIO39
6
IO34
GPIO34
7
IO35
GPIO35
In the pin table, these are marked as I rather than I/O.
Pins connected to internal memoryConnected to internal SPI flash
The datasheet says GPIO6 to GPIO11 on the ESP32 chip are connected to the module’s integrated SPI flash and are not led out to module pins.
Table
Chip GPIO
Status
GPIO6
Connected to internal SPI flash, not led out
GPIO7
Connected to internal SPI flash, not led out
GPIO8
Connected to internal SPI flash, not led out
GPIO9
Connected to internal SPI flash, not led out
GPIO10
Connected to internal SPI flash, not led out
GPIO11
Connected to internal SPI flash, not led out
PSRAM-related note
The datasheet also notes that IO16 / GPIO16 is connected to embedded PSRAM only on module variants that include embedded QSPI PSRAM. For those variants, it cannot be used for other functions.
Table
Module pin
Signal name
GPIO
Note
27
IO16
GPIO16
Reserved only on PSRAM-equipped variants
USB pins
No native USB pins are present
The retrieved pin definitions do not include USB_DP, USB_DM, or any USB interface pins
So for this module, USB is not available as a native peripheral on the module pins
Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
General Purpose Thick Film Standard Power
and High-Power Chip Resistor
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film
Features:
- RMCF – standard power ratings
- RMCP – high power ratings
- Nickel barrier terminations standard
- Power derating from 100% at 70ºC to zero at +155ºC
- RoHS compliant, REACH compliant, and halogen free
- AEC-Q200 compliant
Bluetooth, WiFi 802.11b/g/n, Bluetooth v4.2 +EDR, Class 1, 2 and 3 Transceiver Module 2.4GHz ~ 2.5GHz Antenna Not Included, U.FL Surface Mount #RF#wifi#ESP32#CommonPartsLibrary#MCU#module