Teltonika CALYX EBD021 4G – Embedded Cellular Raspberry Pi HAT+ with 4G Cat 4, GPIO modem control and PCM audio
The Teltonika CALYX EBD021 4G is an Embedded Cellular Raspberry Pi HAT+ designed to add mobile Internet access to embedded systems based on Raspberry Pi 4 or 5. This 4G variant mounts directly on top of the SBC, saving space and providing neat integration within compact embedded designs. Supporting 4G Cat 4, GPIO modem control and PCM enhanced audio, the module is aimed at integrators and developers looking to add mobile connectivity where Wi-Fi or Ethernet are not available or reliable. With its 40-pin GPIO header, USB Type-C power supply, Nano-SIM support and mobile antenna connectors, the CALYX EBD021 represents a compact and feature-rich cellular extension for embedded applications.
4G Raspberry Pi HAT+ application and positioning for embedded systems and industrial integration
The CALYX EBD021 is positioned as a cellular expansion module for Raspberry Pi 4 and 5 in environments where fixed or wireless networks are unavailable or insufficiently reliable. Within the datasheet, the platform is linked to sectors such as industrial & automation, energy & utilities, smart city, enterprise and retail. By mounting directly to the SBC and combining mobile data, GPIO modem control and PCM audio, this model fits embedded designs where compact integration and mobile accessibility are key. This makes the product suitable for developers and system integrators looking to extend an embedded Raspberry Pi solution with 4G connectivity.
Why Teltonika CALYX EBD021 4G?
- 4G LTE Cat 4 supports mobile data rates of up to 75 Mbps downlink and 50 Mbps uplink for embedded mobile connectivity.
- Direct mounting on Raspberry Pi 4/5 supports space-saving and neat integration within compact embedded systems.
- GPIO modem control supports wake, reset and modem management via the Pi pins within embedded design environments.
- PCM enhanced audio supports clean audio transmission with low latency within audio-related applications.
- 40-pin GPIO header, USB Type-C power supply and Nano-SIM support flexible integration into Raspberry Pi-based hardware architectures.
- Operating temperature of -40 °C to 75 °C supports deployment in industrial and demanding environments.
Applications
- Industrial & automation
- Energy & utilities
- Smart city
- Enterprise
- Retail
- Embedded Raspberry Pi 4/5 systems
- Mobile connectivity for systems where Wi-Fi or Ethernet are not available or reliable
- Embedded designs for integrators and developers
Key features
- Embedded Cellular Raspberry Pi HAT+
- Suitable for Raspberry Pi 4 and Raspberry Pi 5
- 4G Cat 4 mobile connectivity
- Direct mounting on the SBC
- GPIO modem control
- PCM enhanced audio
- 1 x SIM slot (Nano SIM – 4FF), push-pull
- USB 2.0 & USB Type-C receptacle
- 2 x SMA for Mobile
- 40-pin GPIO header
- Operating temperature -40 °C to 75 °C
- With included mounting kit
Embedded 4G HAT+ technology and integration points
Designed as a direct cellular extension for Raspberry Pi 4 and 5, the CALYX EBD021 mounts directly to the SBC via the 40-pin GPIO header. The module combines 4G connectivity with GPIO modem control, allowing functions such as modem wakeup, reset and on/off to be controlled via Pi pins. In addition, the platform supports PCM audio and USB 2.0, making the module suitable for embedded designs where compact integration, mobile data and complementary control signals must converge within a single HAT+ solution. Because of this structure, the CALYX EBD021 aligns with system integration projects where space savings and mobile expansion play an important role.
Connectivity specifications
Mobile
- 4G LTE-FDD (Cat 4) – 75Mbps DL, 50Mbps UL
- LTE-TDD (Cat 4) – 65Mbps DL, 35Mbps UL
- DC-HSPA+ – 42Mbps DL, 5.76Mbps UL
- 3G – 384 kbps DL, 384 kbps UL
- 2G EDGE – 236.8 kbps DL, 236.8 kbps UL
- 2G GPRS – 85.6 kbps DL, 85.6 kbps UL
- 3GPP Release 9
SIM
- 1 x SIM slot (Nano SIM – 4FF), push-pull
USB
- USB 2.0
- USB Type-C receptacle
Antennas
- 2 x SMA for Mobile
Technical specifications
GPIO and control
- PWR_KEY – modem turn on/off
- Modem wakeup
- Modem reset
- Digital Input, 0 – 3.3 V logic level
- PCM Digital Interface, 0 – 3.3 V logic level
Nutrition
- USB type C – 5 VDC
- 40-pin GPIO header – 5 VDC and 3.3 VDC
Physical interfaces
- 1 x Power, NET IND, NET STAT
- On a 40-pin header/USB power
- USB Type-C receptacle
- 1 x SIM slot (Nano SIM – 4FF), push-pull
- 2 x SMA for Mobile
Dimensions and weight
- 56 x 23.11 x 95.48 mm
- 57 g
Montage
- With included mounting kit
- Environmental specifications
- Operating temperature -40 °C to 75 °C
Environment and hardware
Dimensions
- 56 x 23.11 x 95.48 mm
Weight
- 57 g
Montage
- With included mounting kit
Temperature range
- -40 °C to 75 °C
Certifications
CE, UKCA, EAC, UCRF, RCM, CB, WEEE
In the box
- CALYX
- Quick Start Guide
- PCB connector
- USB Type-C to USB Type-A cable
- Fasteners kit
