Product / Service Details


The iM881A-M is a compact, low power, bidirectional radio module for the 868 MHz frequency band using Semtech’s LoRaWAN® modulation technology. The module provides ultra-long range spread spectrum communication and high interference immunity whilst minimising current consumption. Using the iM881A in an application minimizes the need for an expensive and time-consuming RF development. Fast time to market is possible with this pre-qualified module.

The iM881A provides an optimized RF performance for the extreme temperature range. In addition, the iM881A combines a powerful Cortex M0+ controller with the new LoRaWAN® transceiver SX1272 of Semtech Corporation. It has been specifically designed for battery driven devices. It consumes 38 mA in transmit with the maximum output power of +14dBm. Combined with an excellent sensitivity of down to -138 dBm a range of 15 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.

Embedded Software:
The iM881A-M can be ordered with a pre-programmed embedded protocol stack (iM881A-M_LoRaWAN®): 
It enables Low Power Wide Area Networks (LPWANs) for Internet-of-Things (IoT) and Machine-to Machine (M2M) applications and supports Activation By Personalization (ABP) or Over The Air (OTA) activation. It comes with the WiMOD LoRaWAN® HCI interface and allows easy configuration.

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Extended Features

Key features highlights:

– Compact module 20.0 x 25.0 x 3.3 mm
– LoRaWAN® modulation technology
– Sensitivity down to -138 dBm
– UART, SPI and I²C interface1
– Digital inputs and outputs
– Analog inputs
– Supply voltage range from 1.8 to 3.6 V
– RF interface matched to 50 Ω
– Output power level up to +15 dBm
– High link budget up to 153 dB
– Range up to 12000m (Line of Sight)
– STM32L051C8
– Pre-Certified according to EN 300 220

Supported Regional Parameters
Supported Classes
Class A
Vertical Markets
Smart Metering / Smart Utilities|Smart Agriculture / Farming|Transportation / Logistics / Supply Chain|Smart Buildings / Facilities Management|Smart Cities|Smart Environment|Smart Homes / Consumer|Smart Industry / Industrial IoT|Smart Infrastructure
Regional Markets
Regulatory Certifications
RED (Europe)

Product / Service links

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Test House Report EU868
File type: application/pdf
File size: 98.19 KB
iM881A-M Datasheet
File type: application/pdf
File size: 783.93 KB

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