Home automation that works for South African homes
Stop guessing which devices will integrate and which will arrive in time. Communica stocks a broad range of controllers, sensors, smart relays and development boards that let makers, students, technicians and procurement teams design systems that actually get installed. We focus on components you can collect same-day from Samrand or Pretoria CBD when available, and we provide VAT invoices and account quoting for institutional purchases.
Why choose local stock and expertise
Local availability reduces project delays. Common scenarios we help with: upgrading a student lab with Zigbee gateways and sensors, prototyping a smart energy monitor with ADC-capable microcontrollers, or replacing flaky Wi-Fi relays with wired-capable alternatives for reliably switched lighting. Browse our product ranges to match parts to the job: Shop by category or explore brands stocked locally on our Shop by Brand page.
Core components and compatibility callouts
Selecting controllers, radios and sensors requires matching interfaces, voltage rails and expected loads. Typical choices we advise:
- Controllers: ESP32 for Wi-Fi/Bluetooth prototypes; Raspberry Pi for edge gateways and media-rich automation.
- Radios: Zigbee or Z-Wave modules for mesh reliability; LoRa for long-range telemetry in large properties.
- Relays & switches: Choose SSRs or mechanical relays rated above expected inductive loads; include snubber networks for motors.
- Power: Use regulated 5V/12V supplies sized at 1.5× estimated steady current with headroom for startup surges.
Compare ranges and compatibility in our general product index: All Products. For branch pickup and opening hours, see Branches & Trading Hours.
Specification snapshot (quick table)
| Component | Typical spec | When to pick |
|---|---|---|
| ESP32 dev board | Dual-core, Wi-Fi, BT, 240MHz, 3.3V I/O | Prototyping Wi-Fi sensors and actuators |
| Raspberry Pi 4 | Quad-core, Ethernet, USB, 5V/3A supply | Edge gateway, camera or dashboard tasks |
| Zigbee coordinator | USB or GPIO; IEEE 802.15.4 radio | Reliable local mesh for sensors & bulbs |
| 12V switch-mode PSU | Regulated, 2A-10A options | Poor mains to DC conversion for LED strips, relays |
Quick wiring diagram (lighting relay + sensor)
Sensor (3.3V) | | GPIO ------[Opto/Driver]----- Relay Coil (12V) |Controller (GND) ----------------- GNDPower: 12V supply ---- Relay COM/NO ---- Light load ---- Mains
This ASCII sketch shows separation of low-voltage logic and mains switching. For hands-on wiring guides and parts, check our category pages under Collections.
