# \[Example\] ESP32 Reference Design ## Description An example development and reference design for the ESP32 microcontroller\. ## Project Details - **Owner:** abrahamc - **Created:** 3/1/2022 - **Last Updated:** 3/1/2022 - **Visibility:** Public ## Key Components ### A0 — Label **Pins:** - P1 - P2 ### A0 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### A1 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### A1 — Label **Pins:** - P1 - P2 ### A2 — Label **Pins:** - P1 - P2 ### A2 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### A3 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### A3 — Label **Pins:** - P1 - P2 ### A4 — Label **Pins:** - P1 - P2 ### A4 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### A5 — Label **Pins:** - P1 - P2 ### A5 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### A6 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### A6 — Label **Pins:** - P1 - P2 ### A7 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### A7 — Label **Pins:** - P1 - P2 ### AIN0 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### AIN0 — Label **Pins:** - P1 - P2 ### AIN1 — Label **Pins:** - P1 - P2 ### AIN1 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### AIN2 — Label **Pins:** - P1 - P2 ### AIN2 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### AIN3 — Label **Pins:** - P1 - P2 ### AIN3 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### B0 — Label **Pins:** - P1 - P2 ### B0 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### B1 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### B1 — Label **Pins:** - P1 - P2 ### B2 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### B2 — Label **Pins:** - P1 - P2 ### B3 — Label **Pins:** - P1 - P2 ### B3 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### B4 — Label **Pins:** - P1 - P2 ### B4 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### B5 — Label **Pins:** - P1 - P2 ### B5 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### B6 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### B6 — Label **Pins:** - P1 - P2 ### B7 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### B7 — Label **Pins:** - P1 - P2 ### D1 — [Schottky Diode](https://flux.ai/lwcassid/schottky-diode~zf.md) - Emission Coefficient: 2\.03 - Saturation Current: 3\.15e\-7A - Series Resistance: 2\.8Ω - Breakdown Voltage: 70V **Pins:** - ANODE - CATHODE ### DTS — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_CLK — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_CMD — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_EN — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_EN — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_EN — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO0 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO0 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO0 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO0 — Label **Pins:** - P1 - P2 ### ESP\_IO12 — Label **Pins:** - P1 - P2 ### ESP\_IO12 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO13 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO13 — Label **Pins:** - P1 - P2 ### ESP\_IO14 — Label **Pins:** - P1 - P2 ### ESP\_IO14 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO15 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO15 — Label **Pins:** - P1 - P2 ### ESP\_IO16 — Label **Pins:** - P1 - P2 ### ESP\_IO16 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO17 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO17 — Label **Pins:** - P1 - P2 ### ESP\_IO18 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO18 — Label **Pins:** - P1 - P2 ### ESP\_IO19 — Label **Pins:** - P1 - P2 ### ESP\_IO19 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO2 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO2 — Label **Pins:** - P1 - P2 ### ESP\_IO2 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO23 — Label **Pins:** - P1 - P2 ### ESP\_IO23 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO25 — Label **Pins:** - P1 - P2 ### ESP\_IO25 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO26 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO26 — Label **Pins:** - P1 - P2 ### ESP\_IO27 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO27 — Label **Pins:** - P1 - P2 ### ESP\_IO32 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO32 — Label **Pins:** - P1 - P2 ### ESP\_IO33 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO33 — Label **Pins:** - P1 - P2 ### ESP\_IO34 — Label **Pins:** - P1 - P2 ### ESP\_IO34 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO35 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO35 — Label **Pins:** - P1 - P2 ### ESP\_IO36 — Label **Pins:** - P1 - P2 ### ESP\_IO36 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO39 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO39 — Label **Pins:** - P1 - P2 ### ESP\_IO4 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO4 — Label **Pins:** - P1 - P2 ### ESP\_IO5 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO5 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_IO5 — Label **Pins:** - P1 - P2 ### ESP\_RX — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_RX — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_SD0 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_SD1 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_SD2 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_SD3 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_TX — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_TX — Label - Pin Type: Signal **Pins:** - P1 - P2 ### ESP\_TX — Label - Pin Type: Signal **Pins:** - P1 - P2 ### J1 — [Connector 01x04](https://flux.ai/jharwinbarrozo/connector-01x04-horizontal~h0.md) - Part Type: Connector **Pins:** - Pin\_1 - Pin\_2 - Pin\_3 - Pin\_4 ### J10 — [Connector 01x04](https://flux.ai/jharwinbarrozo/connector-01x04-horizontal~h0.md) - Part Type: Connector **Pins:** - Pin\_1 - Pin\_2 - Pin\_3 - Pin\_4 ### J11 — [Connector 01x04](https://flux.ai/jharwinbarrozo/connector-01x04-horizontal~h0.md) - Part Type: Connector **Pins:** - Pin\_1 - Pin\_2 - Pin\_3 - Pin\_4 ### J12 — [Connector 01x04](https://flux.ai/jharwinbarrozo/connector-01x04-horizontal~h0.md) - Part Type: Connector **Pins:** - Pin\_1 - Pin\_2 - Pin\_3 - Pin\_4 ### J13 — [Connector 01x04](https://flux.ai/jharwinbarrozo/connector-01x04-horizontal~h0.md) - Part Type: Connector **Pins:** - Pin\_1 - Pin\_2 - Pin\_3 - Pin\_4 ### J14 — [Connector 01x04](https://flux.ai/jharwinbarrozo/connector-01x04-horizontal~h0.md) - Part Type: Connector **Pins:** - Pin\_1 - Pin\_2 - Pin\_3 - Pin\_4 ### J15 — [Connector 01x04](https://flux.ai/jharwinbarrozo/connector-01x04-horizontal~h0.md) - Part Type: Connector **Pins:** - Pin\_1 - Pin\_2 - Pin\_3 - Pin\_4 ### J2 — [Connector 01x04](https://flux.ai/jharwinbarrozo/connector-01x04-horizontal~h0.md) - Part Type: Connector **Pins:** - Pin\_1 - Pin\_2 - Pin\_3 - Pin\_4 ### J3 — [Connector 01x04](https://flux.ai/jharwinbarrozo/connector-01x04-horizontal~h0.md) - Part Type: Connector **Pins:** - Pin\_1 - Pin\_2 - Pin\_3 - Pin\_4 ### J4 — [Connector 01x04](https://flux.ai/jharwinbarrozo/connector-01x04-horizontal~h0.md) - Part Type: Connector **Pins:** - Pin\_1 - Pin\_2 - Pin\_3 - Pin\_4 ### J5 — [Connector 01x04](https://flux.ai/jharwinbarrozo/connector-01x04-horizontal~h0.md) - Part Type: Connector **Pins:** - Pin\_1 - Pin\_2 - Pin\_3 - Pin\_4 ### J6 — [Connector 01x04](https://flux.ai/jharwinbarrozo/connector-01x04-horizontal~h0.md) - Part Type: Connector **Pins:** - Pin\_1 - Pin\_2 - Pin\_3 - Pin\_4 ### J7 — [Connector 01x04](https://flux.ai/jharwinbarrozo/connector-01x04-horizontal~h0.md) - Part Type: Connector **Pins:** - Pin\_1 - Pin\_2 - Pin\_3 - Pin\_4 ### J8 — [Connector 01x04](https://flux.ai/jharwinbarrozo/connector-01x04-horizontal~h0.md) - Part Type: Connector **Pins:** - Pin\_1 - Pin\_2 - Pin\_3 - Pin\_4 ### J9 — [Connector 01x04](https://flux.ai/jharwinbarrozo/connector-01x04-horizontal~h0.md) - Part Type: Connector **Pins:** - Pin\_1 - Pin\_2 - Pin\_3 - Pin\_4 ### PWM0 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### PWM0 — Label **Pins:** - P1 - P2 ### PWM1 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### PWM1 — Label **Pins:** - P1 - P2 ### PWM10 — Label **Pins:** - P1 - P2 ### PWM10 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### PWM11 — Label **Pins:** - P1 - P2 ### PWM11 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### PWM12 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### PWM12 — Label **Pins:** - P1 - P2 ### PWM13 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### PWM13 — Label **Pins:** - P1 - P2 ### PWM14 — Label **Pins:** - P1 - P2 ### PWM14 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### PWM15 — Label **Pins:** - P1 - P2 ### PWM15 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### PWM2 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### PWM2 — Label **Pins:** - P1 - P2 ### PWM3 — Label **Pins:** - P1 - P2 ### PWM3 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### PWM4 — Label **Pins:** - P1 - P2 ### PWM4 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### PWM5 — Label **Pins:** - P1 - P2 ### PWM5 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### PWM6 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### PWM6 — Label **Pins:** - P1 - P2 ### PWM7 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### PWM7 — Label **Pins:** - P1 - P2 ### PWM8 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### PWM8 — Label **Pins:** - P1 - P2 ### PWM9 — Label - Pin Type: Signal **Pins:** - P1 - P2 ### PWM9 — Label **Pins:** - P1 - P2 ### RST — Label - Pin Type: Signal **Pins:** - P1 - P2 ### S1 — [Push Button](https://flux.ai/jharwinbarrozo/push-button~eqk.md) **Pins:** - P1 - P2 ### S2 — [Push Button](https://flux.ai/jharwinbarrozo/push-button~eqk.md) **Pins:** - P1 - P2 ### SCL — Label - Pin Type: Signal **Pins:** - P1 - P2 ### SCL — Label - Pin Type: Signal **Pins:** - P1 - P2 ### SCL — Label **Pins:** - P1 - P2 ### SCL — Label - Pin Type: Signal **Pins:** - P1 - P2 ### SDA — Label - Pin Type: Signal **Pins:** - P1 - P2 ### SDA — Label - Pin Type: Signal **Pins:** - P1 - P2 ### SDA — Label - Pin Type: Signal **Pins:** - P1 - P2 ### SDA — Label - Pin Type: Signal **Pins:** - P1 - P2 ### TP1 — [Test Point](https://flux.ai/ramprakashvishnoi8/test-point~w1.md) **Pins:** - P1 ### TP2 — [Test Point](https://flux.ai/ramprakashvishnoi8/test-point~w1.md) **Pins:** - P1 ### TP3 — [Test Point](https://flux.ai/ramprakashvishnoi8/test-point~w1.md) **Pins:** - P1 ### TP4 — [Test Point](https://flux.ai/ramprakashvishnoi8/test-point~w1.md) **Pins:** - P1 ### TP5 — [Test Point](https://flux.ai/ramprakashvishnoi8/test-point~w1.md) **Pins:** - P1 ### TP6 — [Test Point](https://flux.ai/ramprakashvishnoi8/test-point~w1.md) **Pins:** - P1 ### U2 — MCP23017\-E/SO - Manufacturer Part Number: MCP23017\-E/SO - Manufacturer Name: Microchip Technology - Datasheet URL: http://www\.microchip\.com/mymicrochip/filehandler\.aspx?ddocname=en023709 - Part Type: Integrated Circuit - Package or Case Code: 28\-SOIC **Pins:** - \~RESET - A0 - A1 - A2 - GPA0 - GPA1 - GPA2 - GPA3 - GPA4 - GPA5 - GPA6 - GPA7 - GPB0 - GPB1 - GPB2 - GPB3 - GPB4 - GPB5 - GPB6 - GPB7 - INTA - INTB - SCK - SDA - VDD - VSS ### U3 — TPS564201DDCR - Manufacturer Part Number: TPS564201DDCR - Datasheet URL: http://www\.ti\.com/general/docs/suppproductinfo\.tsp?distId=10&gotoUrl=http%3A%2F%2Fwww\.ti\.com%2Flit%2Fgpn%2Ftps564201 - Manufacturer Name: Texas Instruments - Package or Case Code: TSOT\-23\-6 - Part Type: Integrated Circuit **Pins:** - EN - GND - SW - VBST - VFB - VIN ### U4 — USB4110\-GF\-A\_REVB - Manufacturer Part Number: USB4110\-GF\-A - Package or Case Code: Surface Mount, Right Angle - Manufacturer Name: GCT - Datasheet URL: https://gct\.co/files/drawings/usb4110\.pdf - Part Type: Connector **Pins:** - CC1 - CC2 - DN1 - DN2 - DP1 - DP2 - GND - GND - GND - GND - GND - GND - SBU1 - SBU2 - VBUS - VBUS ### U5 — ADS1115IDGSR - Datasheet URL: https://www\.ti\.com/general/docs/suppproductinfo\.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww\.ti\.com%2Flit%2Fgpn%2Fads1113 - Part Type: Integrated Circuit - Manufacturer Name: Texas Instruments - Manufacturer Part Number: ADS1115IDGSR - Package or Case Code: 10\-VSSOP **Pins:** - ADDR - AIN0 - AIN1 - AIN2 - AIN3 - ALERT/RDY - GND - SCL - SDA - VDD ### U6 — [CP2102N\-A02\-GQFN28](https://flux.ai/vasyl/cp2102n-a02-gqfn28~xo8.md) - Manufacturer Part Number: CP2102N\-A02\-GQFN28 - Manufacturer Name: Silicon Labs - Package or Case Code: CP2102N\-A02\-GQFN28 - Datasheet URL: https://www\.silabs\.com/documents/public/data\-sheets/cp2102n\-datasheet\.pdf - Part Type: Integrated Circuit **Pins:** - \~CTS - \~DCD - \~DSR - \~DTR - \~RI\~/CLK - \~RST - \~RTS - \~RXT\~/GPIO\.1 - \~SUSPEND - \~TXT\~/GPIO\.0 - \~WAKEUP\~/GPIO\.3 - CHR0 - CHR1 - CHREN - D\- - D\+ - GND - GND - GPIO\.4 - GPIO\.5 - GPIO\.6 - NC - RS485/GPIO\.2 - RXD - SUSPEND - TXD - USB - VDD - VREGIN ### U7 — PCA9685PW,118 - Package or Case Code: 28\-TSSOP - Manufacturer Name: NXP - Datasheet URL: https://www\.nxp\.com/docs/en/data\-sheet/PCA9685\.pdf - Manufacturer Part Number: PCA9685PW,118 - Manufacturer Part Number: PCA9685PW,118 - Part Type: Integrated Circuit **Pins:** - \~OE - A0 - A1 - A2 - A3 - A4 - A5 - EXTCLK - LED0 - LED1 - LED10 - LED11 - LED12 - LED13 - LED14 - LED15 - LED2 - LED3 - LED4 - LED5 - LED6 - LED7 - LED8 - LED9 - SCL - SDA - VDD - VSS ### USB\_D\- — Label **Pins:** - P1 - P2 ### USB\_D\- — Label **Pins:** - P1 - P2 ### USB\_D\- — Label **Pins:** - P1 - P2 ### USB\_D\+ — Label **Pins:** - P1 - P2 ### USB\_D\+ — Label **Pins:** - P1 - P2 ### USB\_D\+ — Label **Pins:** - P1 - P2 *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://flux\.ai/abrahamc/example\-esp32\-reference\-design\~1d](https://flux.ai/abrahamc/example-esp32-reference-design~1d).* --- *Generated from [https://flux\.ai/abrahamc/example\-esp32\-reference\-design\~1d](https://flux.ai/abrahamc/example-esp32-reference-design~1d)*