Широкодиапазонный радио модуль IMST iM881A-M

Широкодиапазонный радио модуль IMST iM881A-M
  • SRD Band 863 to 870 MHz
  • Range: up to 12000 m
  • RF output power: up to +14 dBm
  • Sensitivity: up to -138 dBm

The iM881A-M is a compact and low-cost radio module that operates in the unlicensed 868 MHz band and combines a powerful Cortex-M0 controller with the new LoRa® transceiver SX1272 of Semtech Corporation. It has been specifically designed for battery driven devices. It consumes 40 mA in transmit with the maximum output power of +14dBm. Combined with an excellent sensitivity of down to -138 dBm a range of 12 km can be achieved in free space environment. The iM881A-M is pre-certified according the European R & TTE guideline and can be soldered like an SMD component. iM881A-M passed the Orange device interoperability test. This test validates the performance of the iM881A-M in the Orange public LoRaWAN® network environment.

The iM881A-M can be ordered with a pre-programmed embedded protocol stack in two options:

  • iM881A-M LR Base:This WiMOD LR (Long Range) Base firmware is a collection of functionalities and applications like Radio Link Test, Sensor App., Data Link Service, etc. embedded in our powerful WiMOD OS operating system. It does not include any LoRaWAN® functionalities. The WiMOD LR HCI interface provides to the user direct access to many radio parameters. Please refer to the download section.
  • iM881A-M LoRaWAN:The LoRaWAN® protocol stack, specified by the LoRa Alliance, is based on IBM’s LMiC and IMST’s WiMOD-OS. It enables Low Power Wide Area Networks (LPWANs) for Internet-of-Things (IoT) and Machine-to Machine (M2M) applications and supports Direct or Over The Air (OTA) activation. It comes with the WiMOD LoRaWAN® HCI interface and allows easy configuration. Please refer to the download section.

Application Areas

  • Automated Meter Reading
  • Home and Building Automation
  • Wireless Alarm and Security Systems
  • Industrial Monitoring and Control
  • Long Range Irrigation Systems
  • IoT (Internet of Things)
  • Smart Cities

Technical Data

  1. Frequency range:SRD Band 863 to 870 MHz
  2. Modulation:LoRa™ Spread-Spectrum
  3. RF output power:up to +14 dBm (50Ω pad)
  4. Receiver sensitivity:-138 dBm (SF 12; SB 125 kHz, CR 4/6)-134 dBm (SF 12; SB 250 kHz, CR 4/6)-128 dBm (SF 12; SB 500 kHz, CR 4/6)
  5. RF datarate:0.24 to 37.5 kbps50kbps FSK-modulation
  6. RF range:up to 12000 m (line of sight)
  7. Operating voltage:1.8 V to 3.6 V
  8. Current consumption:1.4 μA (module in sleep, RTC running)11.2 mA (Rx)38 mA (Tx @ 3.0 V/ +14 dBm); 29 mA (Tx @ 3.0 V/ +13 dBm)
  9. Interfaces:UARTSPI*I²C*RF (LoRa™)
  10. IO's:Digital IOsAnalog Inputs
  11. Dimension (LxWxH):20 x 25 x 3.3mm
  12. Operating temperature:-40°C to +85°C
  13. Certification:Pre-Certified according to ETSI EN 300 220iM881A-M passed the Orange device interoperability test

* This functionality is not part of the standard firmware.