The Teltonika Calyx is a purpose-built industrial-grade cellular Raspberry Pi HAT+ that delivers stable, high-performance mobile connectivity to the Raspberry Pi 4 and 5.
For years, developers working with the tiny but mighty Raspberry Pi for commercial and industrial applications faced a compromise. Their projects often relied on bulky USB dongles or unstable M.2 extensions to get online. These options compromise the Pi's essential compact footprint and introduce unacceptable points of failure in mission-critical environments.
The Teltonika Calyx transforms the widely accessible single board computer into a professional, resilient IoT gateway, providing reliability and high integration for applications requiring real-time response.
The CALYX mounts directly on top of your SBC computer, saving space and ensuring clean integration. Equipped with features like GPIO modem control and PCM audio support, CALYX offers compact and feature-rich cellular expansion for integrators and developers.
Calyx 4G: The Global Workhorse
The 4G Calyx features a robust 4G Cat 4 modem, which is a widely used standard in the industry today. It is perfect for high-volume deployments that require reliable global coverage and low-to-medium bandwidth without the need for 5G performance.
The Perfect Form Factor
Calyx cellular Raspberry Pi HAT+ achieves industrial-grade status through its integrated design. As a HAT+ device, it is designed to fit the Raspberry Pi perfectly, matching its credit-card size to ensure an ultra-compact, professional footprint.
This integration eliminates the instability and space consumption of consumer dongles and improvised M.2 setups. The module connects to the Pi via a USB Type C for high-speed data transfer, ensuring a clean and secure setup suitable for challenging environments. On top of that, Teltonika Calyx is engineered to operate across a wide industrial temperature range of -40 °C to +75 °C.
The Industrial Power of GPIO Control
Another competitive leap with Teltonika Calyx is in its physical integration and software control. Teltonika designed the module to utilize the Raspberry Pi’s dedicated GPIO pins to achieve full, essential modem control. This is the industrial secret sauce: your Raspberry Pi can act as a failsafe mechanism. If the modem ever locks up due to network instability, the Pi can automatically reset, power cycle, or wake the modem.
This GPIO advantage is a non-negotiable feature for mission-critical deployments, improving system uptime and cutting down on expensive, time-consuming field service visits.
Advanced Features: PCM Audio Support
Further enhancing its versatility, the Calyx Raspberry Pi HAT+ is designed with PCM audio support. This feature ensures clean, digital transfer of audio between the mobile modem and the Raspberry Pi via the GPIO pins.
This integration flexibility is vital for applications requiring integrated voice communication, such as SMS/Voice gateways, or specialized digital audio streams, future-proofing the device for complex applications.
Read the full article on the Teltonika website and see their use cases too
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