Информация о продукте


Широкодиапазонный радио модуль

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.

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iM881A Datasheet V1.0 (1016.1 KB)
iM880B AN016 RFSettings V1_1 (492.1 KB)
WiMOD LoRaWAN EndNode Modem Feature Spec V1_10 (541.5 KB)
WiMOD LoRaWAN EndNode Modem HCI Spec V1_13 (964.4 KB)
iM88x AN011 RangeTest V1.1 (568.9 KB)
iM880B AN016 RFSettings V1.1 (611.2 KB)
LoRaWAN Certification Certificate - IMST GmbH iM881A EU868 (404 KB)
LoRaWAN GitHubCode QuickStartGuide (1.4 MB)
WiMOD LoRaWAN EndNode Modem Feature Spec V2.4 (590.1 KB)
WiMOD LoRaWAN EndNode Modem HCI Spec V1.22 (985.9 KB)
iM880x AN011 RangeTest V1_1 (253.5 KB)

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