ESP32 PLC Industrial Controller

Type	ESP32-based industrial PLC
Core technology	ESP32 (Espressif), dual-core
Operating system	None (bare metal / FreeRTOS)
Programming	Arduino IDE, C/C++
Native wireless	Yes — WiFi and Bluetooth on every model
Linux support	No
Docker support	No
Node-RED support	No
Main role	Connected industrial automation and IoT control
Certifications	CE, RoHS

What it is

An ESP32 PLC is an industrial controller based on ESP32 technology with native WiFi and Bluetooth on every model. It combines deterministic control with wireless connectivity. Programmed using Arduino IDE.

When to use it

When industrial I/O control and native wireless connectivity are both required
When Arduino IDE programming is preferred over Linux-based environments
For connected automation, remote monitoring and wireless distributed control
When the dual-core architecture (separate cores for control and communication) is beneficial

When not to use it

When Linux, Python, Docker, Node-RED or CODESYS are required — use Raspberry Pi PLC instead
When local databases, BI integration or heavy edge computing are needed — use Raspberry Pi PLC instead
When only a compact wireless IoT node is needed — consider WIS instead

Key features

Native WiFi and Bluetooth on every model — no additional hardware required
Dual-core ESP32: control logic and communications run independently
I/O range: 14 to 61 points
CORE and FLEX versions available on selected models

CORE and FLEX

FLEX: configurable — choose communication boards
CORE: the most popular pre-configured combination, ready to order

Compatible software and protocols

Arduino IDE (C/C++), Industrial Shields library
WiFi (native), Bluetooth (native), Ethernet, RS485, RS232 (selected models)
Modbus RTU, Modbus TCP, MQTT, I2C, SPI, UART (x2)

I/O specifications

Analog/convertible inputs configurable as 0–10V or 4–20mA. All digital outputs support PWM.

Model	Analog in	Digital in	Digital out	Relay	Total I/O	CORE/FLEX	Price from
ESP32 PLC 14	2	7	4	0	14	Yes	€109
ESP32 PLC 19R	4	2	3	8	17	No	€249
ESP32 PLC 21	6	7	8	0	21	Yes	€239
ESP32 PLC 38AR	10	9	11	8	38	No	€319
ESP32 PLC 38R	8	4	6	16	34	No	€329
ESP32 PLC 42	12	14	16	0	42	No	€309
ESP32 PLC 57R	12	6	9	24	51	No	€409
ESP32 PLC 58	16	21	24	0	61	No	€379

Prices are reference prices and may change.

Typical applications

Connected industrial automation with wireless monitoring
Industrial IoT control systems
Automated warehouse and logistics control
Industrial machinery retrofit and digitalisation