GreaseBoss Endpoint integrates Nordic Semiconductor’s nRF52833 SoC for data collection and sensor interface management, before relaying key metrics to a GreaseBoss gateway using its Bluetooth® LE connectivity. The nRF52833 SoC’s powerful 64 MHz, 32-bit Arm® Cortex® M4 processor with floating point unit (FPU) employs edge processing to select and send only the relevant information, avoiding unnecessary data transmission and conserving power.
From the gateway the key data is relayed to the Cloud, from where it can be accessed and analyzed by users. Both automated and on-demand reports are available from the ‘GreaseBoss Cloud’ web platform, allowing companies to check whether they are meeting their pre-set lubrication requirements, and receive alerts if any areas of non-compliance are detected. Users can also configure the plant structure set up from the web platform.
This system is built using Nordic solution partner Memfault’s IoT reliability platform for embedded observability, remote debugging, and over-the-air (OTA) fleet management. Memfault provides capabilities such as metric, reboot, and trace reporting along with performance benchmarking to ensure the reliability of the GreaseBoss Endpoint sensors. By leveraging Memfault, GreaseBoss Endpoint significantly reduces the need for unnecessary on-site visits and hardware returns to debug issues, saving time and money. It also helps users increase the uptime and reliability of their assets. With Memfault also used on its devices in development, GreaseBoss performs more quality analysis and ensures each device meets the required standards before shipping.
“To make GreaseBoss possible, our sensors needed to have the longest possible life while in harsh industrial environments with extreme temperatures and lots of RF obstacles,” says Condoleon. “The nRF52833 SoC hits the sweet spot with its ultra low power consumption, extended operating temperature range from -40 to 105˚C and max transmit power of +8 dBm. The wide input voltage range also helped simplify the design and remove unnecessary components from the BOM [Bill of Materials] by powering the chip directly off the replaceable coin cell battery.”
Due to the large number of sensors required, and their often hazardous or hard to reach placement, achieving a long battery life was key to this application. The GreaseBoss Endpoint was able to do this thanks, in part, to the low power operating characteristics of the nRF52833 SoC and Memfault’s performance monitoring capabilities. GreaseBoss also used the Nordic Power Profiler Kit II (PPK2) to run various power consumption scenarios to ensure that the devices can continuously function for several years.
“The great community, support and development tools were key drivers in choosing a Nordic solution,” continues Condoleon. “We used the nRF Connect SDK to build our application entirely in-house – in fact, we were able to use the SDK to prototype parts of our application in a matter of days and develop a field ready beta [solution] in weeks. The abundance of sample code made it easy to get started, and we found the documentation easy to navigate and helpful as we started to optimize for power and performance.”