PLEXUS: a dedicated networking infrastructure that allows for extremely reliable data communications

To support cashless payments, Sendrato uses redundancy in data-communication by bundling together multiple existing and ad-hoc networks. Existing networks can be cellular networks, wired (LAN) networks or wireless (WLAN) networks or any other available network offered by existing network service providers. Ad-hoc networks are networks that are created by ourselves. These networks include IEEE 802.15.4 type of networks that utilise the following frequencies: 433MHz, 900MHz and 2.4GHz.

reliable: 99,9999% uptime


Data is sent simulta
neously by all of the networks

Resilient to (temporary) power failure

Each PLEXUS node is remotely monitored

Simultaneous data communication

With PLEXUS data is sent simultaneously over all of the networks e.g. cellular, 2.4 GHz, 433MHz, 900MHz, LAN or WLAN. The first data message received is processed, while the others are disregarded. The reply data message is again sent back over all networks and the first message received is used. So, if any of the available networks is slow or goes down, the remaining networks continue.

Remote monitoring

Each PLEXUS node is connected to a central management console allowing for remote monitoring of its status. This includes current location (a GPS receiver is built in each node), temperature, whether it's running on battery or external power, the status of the underlying networks and the total usage (download/upload bandwidth).


With an uptime of 99.9999%, PLEXUS is the solution for critical applications like cashless payments.