Teltonika CALYX Pi HAT+: Industrial 4G, 5G & 5G RedCap for Raspberry Pi

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.

Millbeck are 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.

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? Millbeck provides CALYX in the UK

We provide all three CALYX variants and can bundle these to form a full connectivity solutions with IoT SIMs and antennas.

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