The uPLC (Universal Programmable Logic Controller) is a compact (22x32mm) I/O controller powered by the ESP32, designed to automate various tasks around you. So far, three versions have been developed. All versions are generally 24V-tolerant for digital I/O, except for the analog inputs, and feature a wide-range 3.8-24V buck regulator for power input.
The primary purpose of the uPLC is to "smartify" devices by integrating them with ESPHome. But it can also function as a direct, point-to-point PLC, using ESP-NOW for wireless communication, replacing traditional wired connections at a cost of latency.
- uPLC-Digital: High-speed digital I/O
- uPLC-Relay: Relays and digital I/O
- uPLC-Analog: ADC and DAC
- uPLC-COMM: For sensor connections- SPI, I2C, SDI12 support
- uPLC-4_20: Current loop for industrial sensors
- uPLC-TBD: If you have a good idea give me a message or issue
| Parameter | Description |
|---|---|
| Input Voltage | 3.8-24V |
| Current Consumption | TBD: WiFi Active: ##mA, Radio Off: ##mA, Deep Sleep: ##uA |
| Communication | 2.4GHz Wi-Fi, UART (TTL level) |
| Baud Rate | 115200 |
| PCB Size | 22 x 31.1 mm |
| PCB Material | 1.6mm FR4, HASL lead-free, 4-layer |
| Case Size | X x X x X mm (TBD) |
To facilitate manufacturing and development, I've created a panelized version using KiKit scripting. The uPLC-Stack includes two units of each version, making it easier to assemble and test multiple variants in one go. Im planning on
To use the panelization script, clone all the uPLC repositories and organize them in a directory one level back from the uPLC-Stack folder. This allows the KiKit script to automatically pull in all required files for panelizing.
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