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EM1206+RJ203 Quad High Speed UART Programmable Embedded IoT Module

The EM1206 is a compact Tibbo BASIC/C-programmable IoT Module with Ethernet, as well as optional GPRS** 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 34.4x20mm (1.35×0.79″) of the host board’s space.

The module’s potent hardware mix, which also includes the onboard flash memory with 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 terminals, and other lightweight devices.

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

The EM1206 may be uploaded with a fully functional serial-over-IP (SoI) application that turns the EM1206 into a powerful serial over IP (SoI) device, a.k.a. the Ethernet converter.

** Requires a standard GPRS modem (i.e. Simcom’s SIM900), to be connected to the UART #4 of the EM1206.

Key Features:

  • High-performance CPU (T1000)
  • 10/100 Base-T Ethernet port
  • Optional GPRS connectivity(requires an external modem)
  • 4 UARTs support serial, Wiegand, and clock/data streams
  • 4 synchronous serial ports with SPI and I2C modes
  • 17 general-purpose I/O lines
  • Supports externally connected LCDs and OLEDs
  • Supports external matrix and binary output keypads
  • Can drive an externally connected buzzer
  • 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

Technical Data

Technical Data:

  • Based on the high-performance T1000 IC
  • 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)
  • 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
  • Supports LCD and OLED panels*
  • Supports matrix and binary output keypads*
  • programmable square-wave output for driving a buzzer*
  • Onboard RTC (requires external backup power)
  • 1MB flash memory for TiOS, application code, and file system
  • 2048-byte EEPROM for data storage
  • Four LEDs: Green and red main status LEDs, Yellow Ethernet link LED, Green 100Mb LED
  • Two control lines for driving two additional status LEDs*
  • Software-controlled onboard PLL
  • Reliable power-on/brown-out reset circuit
  • Power: 230mA @ 3.3V (100Base-T mode, PLL on)
  • Dimensions (LxWxH): 33.4×18.1×4.2mm
  • Dimensions with RJ203 (LxWxH): 34.4×20.0x15.5mm
  • Operating temperature range: -20 ~ +70C
  • Firmware is upgradeable through the serial port or network
  • CE- and FCC-certified.

*Must be connected externally

Order Options


Order Code Item
RJ203+EM1206-1024K-01 RJ203+EM1206 with 1024K flash, hardware 01



EM1206EV hardware manual (online)
EM1206 hardware manual (online)

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