IEC 62056-21 Optical Interface
This article discusses an optical interface designed for communication with various devices using the IEC62056-21 standard, commonly utilized with different types of meters, though not limited to them.
INFO
The interface can be purchased on Tindie
Features
- Compatible with devices using the IEC62056-21 interface
- Designed for pinout compatibility with the Wemos Mini layout
- Supports both 3.3V and 5.0V logic levels
- Operates with a power supply range of 3.3V to 5V
Pinout
Pins without a label are not connected
Specification
- Power: 3.3V-5V
- Logic level: 3.3V or 5V
- Infrared wavelength: 850-940nm
- Transmission: half-duplex
- PCB
- Diameter: ⌀30mm ±0.2mm
- Material: FR4
- Color: Black
- Thickness: 1.6mm
- Surface Finish: Lead Free
PCB Dimensions
Pinout compatible with
- ESP8266 D1 mini
- ESP32 D1 mini
- ESP32 S2 mini
- ESP32 C3 mini
How to connect
Do not cross RX/TX signals.
Optical Interface | Microcontroller |
---|---|
VCC | 3.3V or 5V |
GND | GND |
TX | TX |
RX | RX |
Arduino
Before uploading the sketch disconnect TX and RX lines.