4.2.4 Analog / UART

Config

The SmartSampler2 provides a combined Analog / UART connector with shared power supply pins and six signal pins. Each signal pin can either be used as an Analog input (0–5 V), Pulse input (0–5 V) or as part of a UART port (TX/RX).

Connector Pinout

For detailed information about electrical characteristics, pin assignments, voltage ranges, and hardware limitations, please refer to the dedicated hardware documentation.

Channel Selection

In the Basic tab, each of the six signal pins can be configured as either:

• Analog input → Voltage measurement in the range of 0–5 V.
• Pulse input → Pulsed sensors with an output range between 0–5 V.
• UART signal → Assigned as TX or RX for one of the three available UART ports.

Example:

• Enable Analog 1 and Analog 2 → Both pins operate as analog inputs.
• Switch UART1 ON → Pins 1 (TX) and 3 (RX) are reserved for UART1 communication and no longer available as analog inputs.

Save Settings

• Press Save to apply the channel selection.
• Changes take effect immediately and persist after restart.

Notes

• Each UART requires two pins (TX + RX).
• When a pin is used for UART, it is not available as an analog input.
• Supply pins (V+ and GND) are common for all connected devices.
• Ensure correct wiring when combining analog sensors and UART devices on the same connector.