$2 Module

Weightless delivers lowest possible cost IoT/M2M products.

The benefit of licence exempt spectrum

One of the most significant costs is that of the network itself and it has a number of elements. The first of these is the cost of suitable wireless spectrum. Conventionally, M2M solutions have been developed around legacy telephony based GSM technologies – GPRS, 3G and LTE. Not only are these technologies not optimal for most IoT applications but spectrum licensing costs are significant. The high cost of access to the radio spectrum inevitably translates into a corresponding high cost of data transmission for the end user.

Weightless technology is frequency agnostic and can operate across different spectrums – importantly including licence exempt spectrum with zero access costs. Weightless technologies are typically deployed in sub-1GHz frequencies; Weightless-W is designed to operate in TV white space spectrum whilst Weightless-N operates in Industrial, Scientific and Medical (ISM) bands.

Longer range, fewer base stations

Range is another element with a strong influence on the cost of network deployment. Range translates proportionately to cell size and is one factor in the determination of the number of terminal devices that can be associated with each base station. The fewer the base stations needed in any given network, the lower the overall network cost.

Both Weightless-W and Weightless-N technologies are capable of ranges equivalent to and better than GPRS, 3G and LTE. Excellent signal propagation characteristics mean long range and excellent penetration of signal into buildings. Typically an urban range to terminals mounted internally is around 5km whilst a line of sight rural implementation could achieve up to 30km. Excellent signal propagation in sub-1GHz spectrum also enables smaller, less sophisticated and lower cost antennas to be used on endpoints while antenna location can in many cases become less critical.


Whether you are developing a network that you will operate or you are designing applications to connect to an existing network managed by another operator, low network installation costs lead to lower tariffs to each user of the network. The capital expenditure (CAPEX) for a network is considerably less than for an equivalent traditional cellular technology. Commercial grade basestation hardware typically costs less than USD$3,000.

Lower OPEX

Weightless devices have been designed so that they do not send much data, and do not greatly load the network. Sensor-style devices may only wake up once every 15 minutes, or even less frequently. This will allow a tariff that charges only a small amount for when a device is communicating, and nothing at all when it is not, because the loading it places on the network is very small. This very low operational expenditure (OPEX) makes it possible to achieve the subscription fees of a few dollars per year needed to meet typical IoT use case requirements.

Low cost hardware

The Weightless-N specification requires no exotic, high cost components to implement either end of the link. Commodity transceiver and microcontroller devices together with a regulator, crystal, a small number of passives and a low cost antenna mean that modules can be produced for less than USD$2. The Weightless-W specification has been created in such a way that it can be implemented on a chip costing just USD$1-2 in volume.

Low cost deployment and maintenance

Fit and forget pricing of modules is complemented by the low power requirements for Weightless terminals making battery operation feasible. Battery powered devices avoid costly deployments requiring a connection to the grid whilst battery lives measured in years mean less or no scheduled maintenance.

What's next?

The cost of deployment of a Weightless network depends on many factors but the trend is very clearly downwards. We are continuously updating information about cost of components, chipsets and modules etc. We also have a full schedule of developments to roll out over the course of the next few weeks and months including new base stations, modules, endpoints, development kits, and evaluation kits - as well as new standards and enhancements to existing standards. To keep right up to speed on all the latest developments as they happen, please click on the orange "Send me breaking news" button in the banner above.