Data Sheet

Hall Sensor
Temp sensor (-40C to 125C)
SD/SDIO/MMC Host Controller
CAN Bus
Other*
SJ3: Use to change voltage to
flash chip
36SenseVPGPIO36*ADC1_0*
37CapVPGPIO37*ADC1_1*
38CapVNGPIO38*ADC1_2*
39SensVNGPIO39*ADC1_3*
32XTAL32GPIO32ADC1_4Touch9
33XTAL32GPIO33ADC1_5Touch8
34GPIO34*ADC1_6VDET1
35GPIO35*ADC1_7VDET2
25GPIO25ADC2_8DAC1
26GPIO26ADC2_9DAC2
27GPIO27ADC2_7Touch7
14GPIO14ADC2_6HSPI_CLKTouch6
12GPIO12ADC2_5HSPI_QTouch5
13GPIO13ADC2_4HSP_IDTouch4
RSTReset
3V33.3V
GNDGND
VBATVBAT
VUSBVUSB
GNDGND
Reset button
GND
21 SDA GPIO21 V_SPI_HD
TX CLK3 GPIO1 U0_TXD
RX CLK2 GPIO3 U0_RXD
22 SCL GPIO22 V_SPI_WP U0_RTS
19 MISO GPIO19 V_SPI_Q U0_CTS
23 MOSI GPIO23 V_SPI_D
18 SCK GPIO18 V_SPI_CLK
5 GPIO5 V_SPI_CS0 LED (Blue)
15 GPIO15 ADC2_3 HSPI_CS0 Touch3
2 CS GPIO2 ADC2_2 HSPI_WP Touch2
0 CLK1 GPIO0 ADC2_1 Touch1 Button
4 GPIO4 ADC2_0 HSPI_HD Touch0
17 GPIO17 U2_TXD
16 GPIO16 U2_RXD
3V3 3.3V
GND GND
VBAT VBAT
VUSB VUSB
GND GND
Button: GPIO 0
____
*On datasheet, but may not be supported yet
ESP32
Dual-core Xtensa 32-bit LX6
Up to 240MHz
520kB internal SRAM
4MB external flash
Power
ESP32 VCC range: 2.2V-3.6V
VBAT: direct to battery (and charger)
Up to 250mA during RF transmissions
VUSB: direct to USB (5V)
Multiplexed I/Os allow up to
18 ADC channels
3 SPI interfaces
3 UART interfaces
2 I2C interfaces
2 I2S interfaces
16 LED PWM outputs
2 DACs
Wireless
Wifi: 802.11 b/g/n/e/i
WPA/WPA2/WPA2-Enterprise/SPS
Bluetooth: Bluetooth 4.2/BLE
ADC Preamp
GPIO pins 36,67,38, and 39 are able to
be used as a low noise analog
pre-amplifier
VCC: Output of regulator 3.3V/600mA
10 Capacitive Touch Inputs
GPIO 3.3V tolerant only
Name
Power
GND
Control
Arduino
GPIO
ADC
DAC
SPI
UART
Touch
Misc
*GPIO: Port Input Only
*ADC: Preamplifier ADC
SJ1: Can be cut to
change charge current
Jumpers
SJ2: Disconnect to
disable Power LED
microB
Connector
JST
Connector
for single
cell LiPo
Power LED: Red
Charge LED: Yellow
SparkFun ESP32 Thing (DEV-13907)
PCB Antenna