Article

The ESP32 Pico Discovery Board

Experimenting made simple

The ESP32 chip is the big brother of the ESP8266: more SRAM memory, higher CPU speed, Bluetooth communication and a greater number of interface pins are just some of its features. Development boards such as the ESP32 Pico Kit make handling easier, they come already equipped with all the essentials such as an antenna, a voltage regulator and a USB interface. The use of pinheaders allows it to be plugged into a breadboard where an application circuit can be built around it. Some of the other necessary components such as pushbuttons, LEDs and a display are not always to hand. This is where the ESP32 Pico Discovery Board comes in, along with these essential components it also has a potentiometer and 7-segment display on one neat board.

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Materials

https://www.espressif.com/en/products/hardware/development-boards

http://www.elektormagazine.com/180341-01

https://esp-idf.readthedocs.io/en/latest/

https://www.arduino.cc/en/Main/Software

https://github.com/espressif/arduino-esp32

http://www.elektormagazine.com/160454

https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers

https://github.com/erikbartmann/ElektorESP32/

http://ai2.appinventor.mit.edu/

http://appinventor.mit.edu/extensions/

http://iot.appinventor.mit.edu/#/bluetoothle/bluetoothleintro

https://www.elektor.com/the-official-esp32-book

https://www.espressif.com/sites/default/files/documentation/esp32_technical_reference_manual_en.pdf

180341-179006-PCB.pdf

Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.

Elektor recommends the Elektor PCB Service service from its business partner Eurocircuits or AISLER as the best services for its own prototypes and volume production.

The use of our Gerber files is provided under a modified Creative Commons license. Creative Commons offers authors, scientists, educators and other creatives the freedom to handle their copyright in a more free way without losing their ownership.

PCB

Download Gerber file: 179006-1_180341 v1.1-ESP32_discovery_board_gerbers.zip

Component list

Component List

Resistors

R1,R2,R3,R4,R5,R6,R7,R8,R9,R10,R16,R17,R18,R19,R20,R21,R22,R23 = 330Ω

R11,R12,R13,R14,R15 = 10kΩ

P1 = 10kΩ linear potentiometer

Semiconductors

SA39-11SYKWA (Kingbright) 7-segment display

DC-10GWA (Kingbright) LED-bargraph

LCD, alphanumerical, 2x16 characters, with I²C Interface

Miscellaneous

K6,K7,K8,K9,K10,K14,K15,K16,K17 = 2-way pinheader socket, 0.1'' pitch

K12,K13 = 4-way SIL pinheader socket, 0.1'' pitch
K11 = 8-way SIL pinheader socket, 0.1'' pitch
K5 = 10-way SIL pinheader socket, 0.1'' pitch
K1,K2,K3,K4 = 17-way SIL pinheader socket, 0.1'' pitch
K18 = 8-way (2x4) pinheader socket, angled, 0.1'' pitch
K19,K20 = 5-way SIL pinheader socket, 0.1'' pitch