EM1206 as a 4-port Serial-over-IP Module

Not available in the U.S. The EM1206 ships blank. You will need to upload the right SoI binary into the module.

The EM1206 is a miniature Tibbo BASIC/C-programmable IoT module with Ethernet and optional Wi-Fi* connectivity.

The EM1206 has four independent UARTs that are packed onto 8 I/O lines (with multiple mapping options to choose from).

In combination with the RJ203 jack/magnetics front end (shown), the EM1206 forms a complete Ethernet node occupying only 34.4x20mm (1.35x0.79") of the host board's space.

The EM1026 may be uploaded with a fully functional serial-over-IP (SoI) application that turns the module into a powerful four-port serial-over-IP (SoI) device.

Both network interfaces — Ethernet and Wi-Fi — are fully supported by the SoI application, with automatic switchover depending on the serial network conditions.

As an SoI converter, the EM1206 is compatible with Tibbo Device Server Toolkit (TDST) for Windows. TDST includes the Virtual Serial Port Driver (VSPD), which enables you to use all four serial ports of the module as remote COM ports of your PC. The Linux version of the VSPD is available as well.

Click here for the description of the EM1206 as a network serial port programmable module.

* Requires the GA1000 Wi-Fi add-on to be connected externally.

Key Features

10/100 Base-T Ethernet port
4 UARTs on 8 I/O lines, flexible mapping options
High-performance CPU (T1000)

Optional Wi-Fi connectivity
(with the GA1000 add-on)

Mates with the RJ203 jack/magnetics front end

3.3V power
EM1206 IoT ModuleTibbo Project Box



  • 10/100Base-T auto-MDIX Ethernet port (mates with the RJ203).
  • Optional Wi-Fi interface (requires the GA1000 add-on module).
  • Four high-speed serial ports (CMOS) packed into 8 I/O lines:
  • Baudrates of up to 921,600bps;
    • None/even/odd/mark/space parity modes;
    • 7 or 8 bits/character;
    • Full-duplex mode with RTS/CTS and XON/XOFF flow control;
    • Half-duplex mode with direction control.
    • Flexible mapping with 15 different options, such as:
      • A single channel: RX, TX, CTS, RTS, DSR, and DTR lines;
      • 3.5 channels: RX, TX, RX2, TX2, RX3, TX3, and RX4 lines;
      • 13 additional arrangements.
  • Based on the high-performance T1000 IC.
  • Four LEDs:
    • Green and red main status LEDs;
    • Yellow Ethernet link LED;
    • Green 100Mb LED.
  • Two control lines for driving two additional external status LEDs.
  • Reliable power-on/brown-out reset circuit.
  • Power: 230mA @ 3.3V (100Base-T mode, PLL on).
  • Dimensions (LxWxH): 33.4x18.1x4.2mm.
  • Dimensions with RJ203 (LxWxH): 34.4x20.0x15.5mm.
  • Operating temperature range: -20 ~ +70C.
  • Firmware is upgradeable through the serial port or network.
  • CE- and FCC-certified.

See Also:

Files and Documentation:

SoI Firmwaresoi_application-4_10-(EM1206EV)-(GA1000).bin
DocumentationSerial-over-IP Solutions Manual
EM1206 Hardware Manual
RJ203 Hardware Manual
CE Certificateem1206_ev-ga1000-ce_rtte.pdf
FCC Certificateem1206_ev-fcc.pdf

Order your EM1206

The EM1206 ships blank. You will need to upload the right SoI binary into the module.

RJ203+EM1206 module combination
Not available in the U.S.