The iM820A is a compact wireless module for the 868 MHz frequency band. Thanks to specific transceiver properties, the iM820A supports low-power applications where permanent wireless availability is required. Its integrated 128-bit AES coprocessor makes this module particularly appropriate for security-related applications. It has a transceiver, microcontroller and an integrated PCB antenna. Of course you can get the module with a 50Ω port for connecting an external antenna. The iM820A can be soldered directly on the target hardware just as usual SMD components. The integration of an RF system in a new or existing product is therefore significant simplified, which reduces development time and costs. With the iM221A, a pin-compatible module for the 2.4 GHz frequency band is available.
Embedded Software
We also provide software to control the wireless communication and permit the implementation of common use cases. The UART interface connects to a host system via host controller interface (HCI) and allows simple configuration of the wireless and application parameters. Software updates are also made via UART interface using a bootloader already integrated into the module. We offer customizing to special requirements as a service.
WiMOD firmware - standard applications (AppStarterKit)
- Chat – bi-directional data transfer between two or more modules
- Radio Link Test – qualitative assessment of the radio link between two modules
- Remote Control – remote switching of outputs at the remote module
- Sensor Control – sensor data transmission between two or more modules
- Sensor Network – sensor network with a central data logge
WiMOD-firmware - sample applications (SampleApps **)
- Transparent Data Exchange – transparent data channel for cable replacement
- Remote Control – simple remote control application
- Range Demo – simple range test
Key Features
- Wireless module for 868 MHz band
- Wake on radio (WOR1) functionallity with low power consumption *
- RF datarate from 1.2 kbps up to 180 kbps
- 128-bit AES coprocessor *
- Received signal strength indicator (RSSI2)
- UART and SPI interface (SPI only on demand)
- Sample applications available
- Software- and pin- compatible with iM221A
- Bootloader functionallity included
- Small footprint, solderable like a SMD component
- Integrated PCB antenna or 50Ω pad
- RoHS conform
Application Area
- Locking systems
- Batterie driven sensor- and actuator- systems
- Remote control
- Building automation
- Metering
| Frequency range | 863 MHz to 870 MHz (902 MHZ to 928 MHz on demand) (433 MHZ on demand) |
| Modulation | GFSK, 2-FSK |
| RF output power | typ. 7 dBm (50Ω pad) |
| Receiver sensitivity | typ. -110 dBm @ 1 % PER3 1.2 kbps typ. -94 dBm @ 1 % PER & 180 kbps |
| RF data rate | 1.2 kbps – 180 kbps |
| RF Range | up to 1100m line of sight |
| Operatung voltage | 2.3 V to 3.6 V (typ. 3.0 V) |
| Current consumption | typ. 23 mA (receive @ 180 kbps) typ. 31 mA (transmit @ 7 dBm) typ. 5 mA (controller active, transceiver off) typ. 1 µA (power down) |
| IO’s | UART, typ. 38.4 kBaud (further on demand) SPI * |
| Interfaces | 6 general purpose IOs (analog/digital) 9 digital IOs |
| Dimensions (LxWxH) | 20 x 25 x 5 mm |
| Operating temperature | -20°C up to +70°C |
