Communications in stock - fast local access and practical choice
Get the communications hardware you need today without long overseas waits. Whether you're building a campus LoRa sensor network, wiring up Ethernet runs for a lab, or integrating cellular telemetry into a prototype, Communica holds a broad range of radios, modules, connectors and cables locally. That means lower lead times, branch collection options and VAT invoices for education and procurement accounts.
Why local stock matters for South African projects
Shipping delays and customs can turn a small build into a month-long project. With stock in Samrand and branches in Pretoria CBD and Cape Town, you can check availability immediately, reserve for branch pickup or request an account quote for bulk buys. Check our company background for service and branch details at About Us.
Typical in-stock categories and brand highlights
Common on-shelf items useful for communications projects:
- RF modules: LoRa, 433/868/915MHz transceivers and antenna kits
- Wi-Fi + Bluetooth modules and USB adaptors for rapid prototyping
- Cellular IoT modules and SIM holders for telemetry
- Ethernet PHYs, RJ45 connectors, shielded cable and glands
- Antennas, SMA/MCX connectors and adaptor assemblies
Browse categories and stock breadth on our collections page: Collections. To explore brands and compatible modules, see the shop-by-brand index: Shop by Brand.
Quick spec callouts and compatibility guidance
When choosing communications hardware, match three practical items: frequency/protocol, interface and power. Below is a compact comparison to speed selection.
| Type | When to use | Common interfaces |
|---|---|---|
| LoRa/LPWAN | Long-range, low-power sensors | UART, SPI |
| Wi-Fi / BLE | Local connectivity, devices and phone apps | UART, USB, SDIO |
| Cellular (2G/3G/4G/LPWA) | Wide-area telemetry and roaming | USB, UART, M.2 |
| Ethernet | High-bandwidth local networks | RJ45, SPI (MAC/PHY) |
Simple compatibility checklist: confirm module interface (UART/SPI/USB), voltage levels (3.3V vs 5V), antenna connector type (SMA/SMA-RP/Micro), and available drivers for your platform. For examples and product browsing, use the full product index: All Products.
Wiring and a basic antenna connection diagram
Typical UART wiring for an RF module to an MCU (3.3V):
MCU TX ----> Module RXMCU RX <---- Module TXGND <----> GND3.3V <----> VCC
SMA antenna fit: module SMA male <---- SMA female antenna. Use a coax adaptor where needed and ensure correct polarity to avoid loss.
