M2M Machine to Machine

433MHz Wireless Transceiver Modules as an alternative with advantages

The Multi-Path-Fading problems of gigahertz applications can be avoid by using a lower ISM frequency band. The 433MHz TinyOne Lite module is a multi-channel radio board, delivering up to 10 mW in the 433 MHz ISM band (unlicensed frequency band).

The module has the same mechanical characteristics like the 868MHz version (same PCB format, half-moons connectors, metallic cover…) and has same software functionalities. It allows ‘point-to-point’, `multipoint’ or ‘network’ functioning modes (mesh-topology, chain-topology,..).

The “ERC recommendation 70-03” describes the different usable sub-bands in the 433 MHz license free band, in terms of bandwidth, maximum power, duty cycle and channel spacing.

These bands are free to use but the module and the user must respect some limitations. Most of these restrictions are integrated in the conception of the module, except the duty cycle. For example, the 1e band is limited to a 10% duty cycle. This means that each module is limited to a total transmit time of 6 minutes per hour. It is the responsibility of the user to respect the duty cycle. Band 1e2 is not applicable due to 25kHz channel spacing.

Furthermore, the module complies with the ETSI 300-220-1 v1.3.1 standards (specific for SRD).Finally, the module complies with the new European Directive 2002/95/EC concerning the Restrictive Usage of Hazardous Substances (RoHS). Please contact Rutronik´s Wireless Competence Center for an individual discussion about the advantages, disadvantages, products, protocols and development equipment.