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The iM891A-XL is a compact and low-cost radio module that operates in the unlicensed 868/915 MHz band and combines a powerful Cortex® M4 controller with the LoRa® transceiver of Semtech® Corporation.

iM891A-XL supports the following LoRaWAN® frequency bands: EU868, IN865 US915, AU915 and AS923 (on request)

With an integrated +22 dBm power amplifier and a sensitivity of -149 dBm, a sensational link budget of 170 dB can be reached. This makes the iM891A-XL an ideal solution for numerous applications such as IoT sensors or home-, building- and industrial- automation.


It is also available without u.fl connector.

Prolink LoRaWAN® stack:

LoRaWAN® is a LPWAN protocol designed by the LoRa Alliance® to connect battery operated ‘things’ to the internet in regional, national or global networks.
LoRaWAN® network architecture is deployed in a star-of-stars topology in which gateways relay messages between end-devices and a central network server

The IMST’s ProLink LoRaWAN® firmware  can be integrated into end devices to participate in public or private LoRaWAN® networks. In addition, the ProLink LoRaWAN® fw adds a proprietary device to device communication to the standard LoRaWAN® FW.

Prolink LoRaWAN
Frequency rangeISM Band 868 MHz / 915 MHz
ModulationLoRa® Spread-Spectrum / wM-Bus
RF output powerup to +21 dBm (50Ω pad)
Receiver sensitivity-149 dBm
RF datarate0.24 to 37.5 kbps LoRa® modulation
250kbps FSK-modulation
RF rangeup to 15000 m (line of sight)
Operating voltage1.8 V to 3.6 V
Current consumption< 1.4 μA (module in sleep, RTC running)
7.2 mA (Rx)
48 mA (Tx @ 3.3 V/ +14 dBm)
RF (LoRa®)
IOsDigital IOs
Analog Inputs
Dimension (LxW)16.8 x 18.6 mm
Operating temperature-40°C to +85°C