ESP32 PLC 42 I/Os



26 Inputs
16 Outputs

Communications: RTC, µSD, Ethernet, USB, Full/Half Duplex RS485, RS232, I2C, Modbus
WiFI & Bluetooth LE

Additional information

ESP32 PLC based details

Industrial Automation


Modular PLC
This is the first piece of equipment based on the Arduino technology designed for professional use. This PLC has 42 I/Os. It also contains several communication ports which provide more flexibility and control. The ESP32 family offers the possibility to expand up to 127 modules through I2C, which means that you can have until 7100 Inputs / Outputs in Master-Slave connections, additionally to sensors, etc…


Programming Software
This PLC can be programmed using the Arduino IDE platform. See the Documentation menu below to download the software for free.


Instantaneous connection and coding
The ESP32 PLC is programmed through the USB ports. This PLC can also be programmed through the Ethernet port remotely. This offers immediate access to the program, maintain and control. Also, you can continuously monitor the status for all the variables, inputs, outputs, etc. It is compatible with the Ardbox and the Touchberry Pi with instantaneous connection.
Total Inputs 26
Total Digital Optoisolated Inputs (4-24Vdc) 14
     Digital Optoisolated Inputs (4-24Vdc) 10
     Digital Optoisolated Inputs (4-24Vdc) | can work like interrupt Inputs INT (4-24Vdc) 4
10 bit Analog Inputs (0-10V) | Digital (4-24Vdc) Inputs configurable by software 12

Inputs note – * From the (Xx) Digital, (Yx) can be configured as Analog (Xx = Total Digital In, Yx = Number of Analog In) * From the (Xx) Digital, (Zx) can be configured as Interrupt (Xx = Total Digital In, Zx = Number of Interrupt pins)

Total Outputs 16
Digital Optoisolated Outputs (5-24Vdc) 10
Digital Optoisolated and PWM (5-24Vdc) | 12 bit Analog (0-10V) Outputs configurable by switch 6
Relay Outputs (220Vac – 5A) 0


Ethernet communication 1
Wi-Fi & BLE (Bluetooth Low Energy) 1
USB port (type B) communication (for uploading or debugging only) 0
Micro USB port (type B) communication (for uploading or debugging only) 1
I2C communication (interface with other Industrial Shields, sensors, I/Os modules) 1
Serial TTL (UART) communication 1
RS-232 communication 1
Half/Full Duplex RS-485 communication 1
SPI external port communication (using MOSI, MISO, SS pins of Arduino) 1
RTC (Real Time Clock. NOTE: I2C port used. See pinout modification) YES
µSD Socket (using SPI port, chip select D53 pin) YES


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