BrewPiLess-32-PCB

PCB board to test BPL firmware from @vitotai with ESP32: https://github.com/vitotai/BrewPiLess

Support 3 versions of ESP32 Devkit

• 30 Pin
• 36 Pin
• 38 pin

Board Size: 80 x 100 mm

Layers: 2

Color: Blue

For connections see:

See https://github.com/vitotai/BrewPiLess/blob/master/docs/13.ESP32Pins.md

Power Supply options

External PS between 8-28Vdc

It uses an Input from 8-28 Vdc with a MP1584 Module.

IMPORTANT!!!! Don't populate JP1 jumper until you regulate this module output voltage. Power on J1 with a voltage between 8 and 28 Vdc, be carefull about polarity. Then regulate output to 5Vdc with potentiometer on module. After checked that voltage, you can populate Jumper to supply power to all board.

External PS 5Vdc

If you want to supply this board with 5Vdc directly, don't use MP1584 module and instead solder a jumper cable between Vin+ and Vout+. Power supply input on J1 too.

USB PS to ESP32

You can supply 5V throught USB from ESP32 too, but you are limited to 500mA from a computer, and 1A from an external 5V power supply

Warning 4-Pin OLED

Be carefull with 4-pin OLED, it has to be GND-VCC-SCK-SDA order! Somes are VCC-GND and can burn it!!! Check-it before connecting.

Features:

• 1 analog input for Sensor, like 5Vdc pressure sensor (P3), populate R4=10K and R5=20K to have a voltage divider of 1.5
• 3 digital input for Rotary Encoder or Switches (P6)
• 2 extra Input/Outputs for sensores or 2-relay Module (P8)
• 4 Input/Outputs for 4-relay Module (P5)
• 1 output for buzzer module or you can populate R6=10K, Q1=2N7000/2N7002 Mosfet transistor channel N, BZ1=5Vdc buzzer - diam=12mm
• 1 UART0 comm port (P9), you can interface it with a USB/RS-232 TTL module to communicate with PC (3.3V compatible)
• 1 One Wire port, mostly for read temperature sensors like DS18B20, you can connect in parallel. Populate R1=4.7K for less than 3 sensors.
• 1 extra Input/Outputs for sensores or 1-relay Module (P1)
• 1 OLED I2C connection for 4 or 7 pin 0.96 module (P4)
• 1 extra I2C port, for display LCD or ADC module ADS1115 (P11). You can select between 5 and 3.3V for this connector, soldering JP2 between 1-2 or 2-3 pins. Populate R2=4.7K and R3=4.7K if your I2C device doesn't have it. Oled/LCD and ADC module have it.
• 1 JTAG connection for debug with ESP-Prog