* These are Tibbo BASIC/C-programmable devices and their function depends on the loaded app.
We offer many ready-to-use apps, among them a serial-over-IP (SoI) app and Modbus Gateway app.

EM1206 Programmable IoT Module

The EM1206 is a compact Tibbo BASIC/C-programmable IoT Module with Ethernet, as well as optional Wi-Fi* and 4G/LTE cellular** connectivity. The EM1206 has four UARTs.

In combination with the RJ203 jack/magnetics front-end (shown), the EM1206 forms a complete programmable Ethernet node occupying only 34.4 x 20mm (1.35 x 0.79") of the host board's space.

The module's potent hardware mix, which also includes the onboard flash memory hosting a hardened fault-tolerant file system, as well as the EEPROM and RTC, has been carefully tailored to address the typical needs of network-enabled control applications. Thus, the EM1206 is especially suitable for "connected" edge products such as sensors, data collectors, meters, and actuators.

Module testing and evaluation can be performed with our EM1206SK starter kit.

* Requires the WA2000 Wi-Fi add-on to be connected externally.

** Requires a standard 4G/LTE modem (i.e., Simcom's SIM7500) to be connected to a UART of the EM1206.

Here is How You Can Use the EM1206

As a Serial-over-IP (SoI)

Serial-over-IP conversion is a large part of what we do, and there is an entire section of our website dedicated to serial converters (a.k.a. "serial device servers"). We offer a free open-source serial-over-IP (SoI) app that turns the EM1206 into a full-featured four-port serial-to-IP converter.

Build Your Own
IoT Solution

The EM1206 is programmable in Tibbo BASIC and Tibbo C. Develop your very own IoT solution from scratch or take inspiration from our open-source applications and code samples published in the Code and Apps section.

Key Features

10/100 Base-T Ethernet port

Optional Wi-Fi connectivity
(with the WA2000 add-on)

Optional 4G/LTE cellular connectivity (requires an external modem)
4 UARTs support serial, Wiegand, and clock/data streams
17 general-purpose I/O lines (5V-tolerant)
Can drive an externally connected buzzer
4 synchronous serial ports with SPI and I2C modes
Supports externally connected LCDs and OLEDs
Supports external matrix and binary output keypads
Onboard RTC (requires external backup power)
1MB flash disk for TiOS, application code, and file system
2048-byte EEPROM
3.3V power
Mates with the RJ203 jack/magnetics front-end
EM1206 IoT ModuleTibbo Project Box



  • Powered by Tibbo OS (TiOS).
  • 10/100BaseT auto-MDIX Ethernet port (no magnetics):
    • Connect any suitable external jack and magnetics; or
    • Combine the EM1206 with the RJ203 jack/magnetics front-end.
  • Optional Wi-Fi interface (requires the WA2000 add-on module).
  • Can control a 4G/LTE modem* (such as the SIM7500).
  • Four high-speed serial ports (CMOS):
    • 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;
    • Encoding and decoding of Wiegand and clock/data streams.
  • 17 general-purpose I/O lines; 8 lines can work as interrupts.
  • Square wave output (can be used for buzzer* control).
  • 4 synchronous serial ports with SPI and I2C modes.
  • Supports LCD and OLED panels*.
  • Supports matrix and binary output keypads*.
  • RTC with dedicated backup power input.
  • 22KB SRAM for Tibbo BASIC/C variables and data.
  • 1MB flash memory for TiOS, application code, and file system.
  • 2048-byte EEPROM for data storage.
  • Four status LEDs onboard:
    • Green and red main status LEDs;
    • Yellow Ethernet link LED;
    • Green 100Mb LED.
  • Two control lines for attaching external green and red main status LEDs.
  • Software-controlled PLL for selecting high or low speed.
  • Reliable power-on/ brown-out reset circuit.
  • Power: 230mA @ 3.3V (100Base-T mode, full speed).
  • Dimensions (LxWxH): 33.4 x 18.1 x 4.2mm.
  • Dimensions with RJ203 (LxWxH): 34.4 x 20.0 x 15.5mm.
  • Operating temperature range: -40 ~ +70°C.
  • Firmware is upgradeable through the serial port or network.
  • Tibbo BASIC/C application can be debugged through the Ethernet LAN.
  • CE- and FCC- certified.

*Must be connected externally.

See Also:


Create powerful, network-enabled applications in Tibbo BASIC and Tibbo C. Learn more...

Platform objects:

  • beep — generates buzzer patterns.
  • button — monitors the MD (setup) line.
  • fd — manages the flash memory file system and direct sector access.
  • io — handles I/O lines, ports, and interrupts.
  • kp — works with matrix and binary keypads.
  • lcd — controls graphical display panels.
  • net — controls the Ethernet port.
  • pat — "plays" patterns on up to five LED pairs.
  • ppp — accesses the Internet over a serial modem (4G/LTE, etc.).
  • pppoe — accesses the Internet over an ADSL modem.
  • romfile — facilitates access to resource files (fixed data).
  • rtc — keeps track of date and time.
  • ser — controls serial ports (UART, Wiegand, clock/data modes).
  • sock — socket comms (up to 16 UDP, TCP, and HTTP sessions).
  • ssi — controls serial synchronous interface channels (SPI, I2C...).
  • stor — provides access to the EEPROM.
  • sys — in charge of general device functionality.
  • wln — handles the Wi-Fi interface.

Function Groups: 27 string functions, 8 date/time conversion functions, encryption/hash calculation functions (RC4, MD5, SHA-1), and more.

Variable Types: Signed and unsigned 8-bit, 16-bit, and 32-bit types; floating point and string types; user-defined arrays and structures.

Files and Documentation

TiOS Firmwaretios-em1206-3_60_06.bin — without Wi-Fi support
tios-em1206w-3_60_06.bin — supports GA1000 add-on
tios-em1206n-3_70_02.bin — supports WA2000 add-on
SoI Firmwaresoi_application-4_30-(EM1206EV)-(GA1000).bin
Documentation EM1206 Hardware Manual
EM1206 Programming Platform
RJ203 Hardware Manual
Serial-over-IP Solutions Manual
CE Certificateem1206_ev-ga1000-ce_rtte.pdf
FCC Certificateem1206_ev-fcc.pdf

Order the EM1206 and related parts

RJ203+EM1206 module combination.
Not available in the U.S.
EM1206SK Starter Kit

EM1206SK Starter Kit

The EM1206EV board plus accessories. The board comes with the RJ203+EM1206 module combination (soldered in) and, optionally, the WA2000 Wi-Fi add-on.

Also included on the board are the RJ45 jack with magnetics, power jack and regulator, one RS232 port with a DB9 connector, Wi-Fi add-on socket, LEDs, MD (setup) button, and a pin header for accessing the module's I/O pins.

For more information, see the EM1206EV documentation.

WA2000 Wi-Fi/BLE Add-on Module

WA2000 Wi-Fi/BLE Add-on Module

Miniature 802.11abgn + BLE4.2 board. Adds Wi-Fi (but not Bluetooth*) connectivity to T1000-based Tibbo programmable devices. Easy to use, fully integrated, low-power. Requires only 5 I/O lines to control. Supports over-the-air (OTA) firmware updates.

* To enjoy Bluetooth Low Energy (BLE) functionality offered by the WA2000, consider upgrading to Tibbo's ARM-based programmable devices.

This device cannot operate by itself. It has to be controlled by one of our compatible products.