ESP micro PLC the size of a post stamp.
The uPLC-analog version is an ESP-32-C3 wifi, bluetooth module for communication and MCU, it has a 3.8-24V buck regulator, has four single ended / two differential 0-3V analog inputs through a ADS1115, one 12 bit 3.6msps analog dac through a MCP4725A0T , and one protected 3.3v GPIO for onwire communication (Eg for DS18b20 sensors). The analog uPLC allso has input voltage monitoring for battery applications.
| Parameter | Description |
|---|---|
| Input voltage | 3.8-24v |
| Current | TBD Wifi: ##mA, Radio Off: ##mA, Deep sleep ##uA |
| Communication | 2.4ghz WIFI, Uart TTL |
| Baudrate | 115200 |
| PCB size | 22x31.4mm |
| PCB info | 1.6mm FR4, HASL lead free, 4 layer |
| Case size | XxXxXmm TBD |
TODO
| Label | GPIO | Description |
|---|---|---|
| 3V3 | 3V3 | 3.3v output for sensor connection |
| ONE-W | GPIO18 | Protected gpio for onewire comm |
| GND | GND | GND port for sensor connection |
| GND | GND | GND port for sensor connection |
| 3V0 | 3V0 | 3.0v rail for analog input connections |
| AOUT0 | DAC | i2c DAC 0-3v3 analog input |
| AIN0 | ADC1 | i2c ADC 0-3v0 analog input |
| AIN1 | ADC2 | i2c ADC 0-3v0 analog input |
| AIN2 | ADC3 | i2c ADC 0-3v0 analog input |
| AIN3 | ADC4 | i2c ADC 0-3v0 analog input |
| GND | GND | Ground |
| 4-24V | Buck reg | 3.8-24v polarity protected power input |
TODO