Teltonika Calyx: Reliable Cellular Connectivity for Raspberry Pi in Kiosks, Signage and EV Charging
When you roll out a digital kiosk, smart sign, or EV charger, the one thing you can’t afford is downtime. A frozen screen or offline terminal doesn’t just look bad—it costs money, frustrates users, and damages trust. Getting reliable internet to those devices is harder than it sounds, especially when they’re spread across car parks, shopping centres or roadside locations.
That’s why the combination of a Raspberry Pi and a Teltonika Calyx cellular module has become such a practical solution. It turns a compact Pi into a self-contained IoT gateway—no cabling, no Wi-Fi headaches, just solid 4G or 5G connectivity that you can monitor and manage from anywhere.
Add a good IoT SIM card and Teltonika’s RMS remote management, and you’ve got everything you need for secure, low-maintenance deployments across hundreds of sites.
Why the Pi + Cellular Setup Works So Well
Independence from fixed networks
Most kiosk and digital signage sites don’t have Ethernet nearby, and relying on someone else’s Wi-Fi is a shortcut to unreliability. A Calyx-equipped Pi connects straight to the mobile network, powered from the same board—so you can install it anywhere with power and a signal.
Small, simple and efficient
You don’t need an industrial PC and a separate router. One Pi, one Calyx, one SIM. Less wiring, fewer points of failure, easier maintenance.
Smarter than a modem
Because the Pi runs local logic, you can buffer content, schedule updates, process telemetry, and even run diagnostics offline. The Calyx handles the connectivity while the Pi takes care of the brains.
Lower cost of deployment
This approach cuts installation and ongoing maintenance costs dramatically. You can roll out hundreds of compact, identical nodes instead of bespoke, over-engineered boxes that need constant babysitting.
Meet the Teltonika Calyx Range
Teltonika’s Calyx series is a family of Raspberry Pi cellular HATs that bring industrial-grade mobile connectivity straight to the board. They use the same trusted modem technology you’d find in Teltonika’s RUT routers, but in a format small enough for embedded projects.
Calyx EBD021 – 4G Pi HAT
- Technology: LTE Cat 4
- Speeds: Up to 150 Mbps down / 50 Mbps up
- 3GPP Release: 9
- Ideal for: reliable 4G data in signage, vending, kiosks, and telemetry
Highlights:
- Global 4G/LTE coverage with fallback for older networks
- Integrated SIM slot for IoT / M2M SIMs
- Compact design, draws power from the Pi
- Easy integration into existing Pi enclosures
Calyx EBD050 – 5G Pi HAT
- Technology: 5G Sub-6 GHz (SA / NSA) with 4G fallback
- Speeds: Up to 3.4 Gbps up / 2.4 Gbps down
- 3GPP Release: 15
- Ideal for: high-bandwidth and low-latency applications such as live video, interactive displays, or EV charging control
Highlights:
- True 5G performance with instant LTE fallback
- Built for data-heavy tasks and real-time responsiveness
- Backwards compatible for smooth rollouts before full 5G coverage
- Designed for long-term industrial use
Calyx EBD070 – 5G RedCap Pi HAT
- Technology: 5G RedCap (“Reduced Capability”)
- 3GPP Release: 17
- Ideal for: IoT and telemetry where 5G efficiency and lower cost matter more than extreme speed
Highlights:
- Optimised for low-power, always-on applications
- Mid-range speeds (150–220 Mbps) ideal for monitoring, control and light media
- Future-ready for upcoming UK RedCap rollouts
- Perfect for smart-city sensors, metering, or small kiosks
Typical Deployments
- ✅ Digital Signage – Push new content, monitor uptime, and restart devices remotely without rolling a van.
- ✅ Kiosks / Vending / Ticket Machines – Handle transactions securely, log data through VPN, and receive firmware updates automatically.
- ✅ EV Charging Stations – Keep payment systems, authorisation and telemetry running even in rural or roadside locations.
- ✅ Industrial Monitoring – Compact, rugged and easily powered, perfect for SCADA nodes or environmental sensors.
- ✅ Pop-Up Retail & Events – Deploy instant connectivity for temporary stands or mobile point-of-sale systems.
IoT SIM Cards – The Link that Keeps Everything Talking
The SIM card you use matters more than most people realise. Consumer SIMs aren’t built for remote, always-on equipment. IoT SIM Cards are. They’re designed for uptime, longevity and control.
At Millbeck, we provide SIMs specifically for these kinds of deployments:
- Roaming / Multi-Network SIMs: automatically pick the best signal (EE, Vodafone, O2, Three).
- Fixed IP SIMs: static addresses for VPN or remote access.
- Private APN SIMs: fully segmented traffic for secure enterprise IoT networks.
- Dynamic IP SIMs: for devices sending data out to cloud services.
- NB-IoT and LTE-M SIMs: ideal for low-power remote monitoring.
With the right IoT SIM, a Calyx-equipped Pi can sit in a locked cabinet or forecourt and stay online for years—no local IT, no messy network changes, just a stable, managed data link.
Teltonika RMS – Remote Management Made Simple
Even the best hardware is only as good as your ability to manage it. That’s where Teltonika RMS (Remote Management System) earns its keep.
RMS gives you:
- A live dashboard showing which devices are online and how they’re performing
- Remote configuration and firmware updates in bulk
- Secure remote access to the Raspberry Pi or any connected device via RMS Connect
- Automated alerts for signal drops, data spikes, or power loss
- Grouping and tagging for easy fleet-wide management
For installers and operators, it means no more unnecessary site visits. You can reboot, reconfigure or update a device from your desk, whether it’s in London, Leeds or Lisbon.
Putting It All Together
A typical deployment looks like this:
- Raspberry Pi 4 / 5 or Compute Module runs your app or control software.
- Teltonika Calyx provides the mobile link via the Pi’s GPIO header.
- IoT SIM Card ensures consistent, secure network access.
- Teltonika RMS keeps you in control remotely.
- External Antenna maintains strong signal inside enclosures or outdoor cabinets.
It’s a clean, modular setup that’s easy to replicate across hundreds of sites.
Benefits at a Glance
- Compact hardware footprint, minimal cabling
- Fast setup—ideal for large-scale rollouts
- Reliable 4G, 5G or RedCap connectivity
- Secure remote access through RMS without needing public IP SIMs
- Simple maintenance—updates and restarts from the cloud
- Future-proof cellular options for long-term projects
Why Buy Through Millbeck
Millbeck is a Teltonika Diamond Partner, which means our team works directly with Teltonika on hardware, firmware and support. We don’t just sell the box—we provide:
- Genuine Teltonika Calyx 4G / 5G Pi HATs
- UK-based IoT SIM Cards with fixed, private or dynamic IP
- High-gain antennas and low-loss LMR-grade cables
- Router configuration and RMS setup services
- Ongoing support from people who actually deploy these systems
If you’re building digital signage, EV charging infrastructure or remote kiosk networks, we can help you get them connected and keep them that way.
In Short
The Teltonika Calyx brings industrial-grade connectivity to the Raspberry Pi—compact, reliable and easy to manage. Pair it with Millbeck IoT SIM Cards and Teltonika RMS, and you’ve got a plug-and-play backbone for any smart-city or industrial deployment.
Strong signal. Remote control. Zero fuss.
That’s how connected infrastructure should be.