Proximity Detector with EFM Processor and Dual RS232 Interfaces

  • 1695


This module contains a AMS TMD26721 Proximity Detector. The module also contains an EFM32ZG108 Gecko low power microcontroller and two RS232 serial ports allowing it to be daisy chained in a network. Pre-Programmed for use in an openHAB Home Automation system or can be Re-Programmed for other uses.


  • AMS TMD26721
    • Integrated digital proximity detector, LED driver, and IR transmit LED
    • Proximity Detection
      • Reduced proximity count variation
      • Programmable offset control register
      • Saturation indicator
      • Programmable integration time and offset
      • Current sink driver for IR LED
      • 16,000:1 dynamic range
      • Maskable Proximity Interrupt
        • Programmable upper and lower thresholds
        • Persistence filter
    • Low power modes
      • Sleep mode 2.2µA Typical
      • Sleep after interrupt mode
      • Wait mode 90µA Typical
      • Programmable wait time from 2.7ms to > 8 seconds
    • +2.6V to +3.6V Input Voltage
    • Small Size: PCB is 20mm x 20mm (0.79" x 0.79")
    • Connector Options:
      • 10 Pin DF11 Male Connector to allow installation on an Engimusing Processor with DF11-10 I/O
      • 6 Pin DF11 Right Angle Male Connector for cable connection
  • EFM32ZG108 Gecko Microcontroller
    • ARM Cortex-M0+
    • Low Power Operation
    • 32KB Flash Memory
    • 4KB RAM
  • MAX3232 Dual RS232 Line Driver/Receiver
  • Two 4 Pin DF11 Right Angle Male Connectors each with Power and RS232
  • 6 Pin DF11 Right Angle Male Connector for Programming and Debug
  • Pre-Programmed with openHAB Item Firmware for Plug-and-Play
  • Pre-Programmed Firmware is Designed for Low Power Operation
  • May be Programmed with the Arduino IDE


  • Near-field proximity
  • Human presence detection
  • Home automation

Eagle Files
TMD26721 Proximity Detector Data Sheet


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