If you’ve ever tried to make a Raspberry Pi field‑ready, you’ll know the pain of USB dongles and improvised adapters. Teltonika CALYX is a purpose‑built Embedded Cellular Raspberry Pi HAT+ for Raspberry Pi 4 and 5 that delivers clean mechanics, proper RF, and industrial reliability without the usual compromises.

Buy from The Router Store (Millbeck), a Teltonika Diamond Partner, and bundle IoT SIMs and antennas for a one‑stop embedded solution.

What makes a HAT+ better than a USB stick in the field?

CALYX mounts rigidly on the Pi, keeps wiring tidy, and is engineered for continuous operation. In harsh or space‑constrained installs, this reduces failure points versus dangling USB modems and DIY carrier boards.

Note: CALYX is about dependable integration on Pi 4/5, not hobbyist tinkering.

Why CALYX?

In botany, the calyx protects the fruit while it develops.

Perfect symbolism.
The Teltonika CALYX Pi Hat protects your connectivity and gives the Pi a rugged, industrial-grade connection to the outside world.

The CALYX family at a glance

EBD021 — 4G Cat 4
Reliable, cost‑effective LTE for telemetry, logging, metering, and light camera workloads.

EBD070 — 5G RedCap
The efficiency sweet spot for modern IoT: lower power and cost than full 5G, with 5G‑class reliability and 4G fallback.

EBD050 — Full 5G
High throughput and low latency for video uplink, real‑time analytics, and edge AI backhaul.

Shared hardware highlights

• HAT+ form factor for Raspberry Pi 4 and Raspberry Pi 5
• Modem control via GPIO (wake, reset, status) and PCM audio support
• External SMA antenna connectors; nano‑SIM (4FF) push‑pull; some SKUs may support eSIM
• Built for unattended, industrial deployments

Technical details integrators care about

• Raspberry Pi support: Pi 4 and Pi 5 (HAT+)
• Data interface: USB data link to the Pi (variant‑dependent)
• Power options: via the 40‑pin header or over USB‑C
• Antennas: detachable external antennas; match high‑gain or MIMO to your RF conditions
• Environment: designed for industrial temperature ranges and continuous operation

Key takeaway: pick the variant for your bandwidth and power budget, then pair with the right antennas and SIM.

How it compares to generic Pi cellular boards

Quick bring‑up on Raspberry Pi OS / Linux

Use standard Linux modem tools; a typical flow looks like:

sudo apt-get update && sudo apt-get install -y modemmanager
mmcli -L (list modems)
mmcli -m 0 –enable (enable the modem)
mmcli -m 0 –simple-connect=”apn=<your_apn>”

Adjust commands for your distro and APN policy.

Proven applications we see in the field

• Raspberry Pi cellular edge gateways for CCTV/ANPR and rapid deployments where a full router won’t fit
• SCADA/PLC telemetry and environmental monitoring or data logging
• EV charger site control, kiosks and POS failover, smart cabinets and vending backhaul
• Pop‑up WAN for construction sites and events with quick setup and teardown
• Connectivity for Digital Signage Remote Management

5G RedCap in a sentence

Choose RedCap when you want 5G‑era reliability and latency improvements without the power and cost of full eMBB 5G—ideal for sensor‑heavy, mid‑bandwidth IoT fleets.

Ready to build? Buy CALYX in the UK

We stock all three CALYX variants and can bundle IoT SIMs and antennas. Order online or speak to our UK engineers for model selection and rollout advice and fast UK dispatch.

Shop CALYX here – CALYX

Speak to an engineer (UK): tel: 0300 124 6181 | sales@routerstore.com

When can you get one?

• Availability: Available now
• Production availability: Available now
• Expect limited early allocation: General availability now

If you deploy Teltonika routers already, the Teltonika Pi Hat gives you the missing smaller footprint option.

Why Buy from The Router Store?

We’re not a marketplace listing. We’re a Teltonika Diamond Partner — the highest level in their partner programme — with over 25 years of telecommunications experience through our parent company, Millbeck Communications.

Complete solution, single source. We supply the router, the antenna, and the SIM. Not three separate orders from three separate companies — one configured package from people who understand how all the components work together.

Expert deployment support. We’ll advise on antenna selection for your specific environment (indoor panel vs outdoor omni vs directional), SIM provisioning strategy (single-network vs multi-network vs eSIM), and router configuration for your use case. Whether you’re connecting a single CCTV camera or rolling out 500 solar inverter monitoring points, we’ve done it before.

UK-based stock and shipping. No waiting for European warehouses. UK stock, UK shipping, UK support.

Managed IoT SIMs. Our connectivity platform provides multi-network SIMs that roam between UK operators for maximum coverage, plus global IoT SIMs for international deployments. Usage monitoring, automated alerts, and remote SIM management included.

Volume pricing. Diamond Partner status means the best pricing on volume orders. Get in touch for project-specific quotes.

Call us on 0300 124 6181 or email sales@routerstore.com to discuss your requirements. We’ll spec the complete solution and get you a quote the same day.

TL;DR — Teltonika CALYX Pi Hat

Industrial cellular modem for Raspberry Pi.
Built by Teltonika.
Available Now from The Router Store (Millbeck)