ET-C15
LoRa 433 MHz Board
SX1278 LoRa radio with regulated 3.3 V and spring antenna
AED 59.00
Out of stockOverview
SX1278 LoRa radio with regulated 3.3 V and spring antenna
The ET-C15 is built around the Semtech SX1278 (Ra-01) — 410–525MHz LoRa/FSK, +18dBm, −148dBm sensitivity. It connects over SPI 3.3V (not 5V tolerant — use a level shifter with 5V Arduinos) and is powered from VIN 3.3–5.5V → AP2112K.
Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.
Good for
- Long-range sensor links
- Meshtastic-style messaging
- Farm and desert telemetry
Key features
What makes it different
Radio
Semtech SX1278 (Ra-01): 410–525MHz LoRa/FSK, +18dBm, −148dBm sensitivity
Interface
SPI 3.3V (not 5V tolerant — use a level shifter with 5V Arduinos)
Supply
VIN 3.3–5.5V → AP2112K
Antenna
Spring antenna on module; IPEX version on request
Open documentation
Schematic, BOM and layout notes published for every board.
Breadboard friendly
Standard 2.54 mm pitch and M2.5 mounting holes.
Specifications
Technical specifications
| Radio | Semtech SX1278 (Ra-01): 410–525MHz LoRa/FSK, +18dBm, −148dBm sensitivity |
|---|---|
| Interface | SPI 3.3V (not 5V tolerant — use a level shifter with 5V Arduinos) |
| Supply | VIN 3.3–5.5V → AP2112K |
| Antenna | Spring antenna on module; IPEX version on request |
| Size | 25.4 × 25.4 mm |
|---|---|
| Mounting | 4 × M2.5 holes, 2.54 mm from each corner |
| Connectors | 11-pin 2.54 mm header |
| Main IC | Ra-01 (LCSC C90040) |
| Revision | Rev A |
| Libraries | Sandeep Mistry LoRa, RadioLib, RNode/Meshtastic (SX127x) |
|---|
Performance
Link budget
Pinout
Pin map and connections
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | Power | 3.3–5.5V |
| 2 | GND | Ground | Ground |
| 3 | 3V3 | Power | 3.3 V regulator output |
| 4 | GND | Ground | Ground |
| 5 | RST | Control | Active low |
| 6 | CS | SPI | NSS |
| 7 | SCK | SPI | SCK |
| 8 | MOSI | SPI | MOSI |
| 9 | MISO | SPI | MISO |
| 10 | DIO0 | Signal | TX/RX done IRQ |
| 11 | DIO1 | Signal | RX timeout |
Mechanical
Dimensions and what's in the box
In the box
- 1 × ET-C15 LoRa 433 MHz Board (assembled)
- 1 × 11-pin 2.54 mm male header, unsoldered
Getting started
- Wire the header: VIN, GND, 3V3, GND, RST, CS
- Libraries: Sandeep Mistry LoRa, RadioLib, RNode/Meshtastic (SX127x)
Compare
Which wireless or wired network board?
| LoRa 433 MHz Board (this board)This board | ET-C11 W5500 Ethernet Board | ET-C18 nRF24L01+ Socket Adapter | |
|---|---|---|---|
| What it does | SX1278 LoRa radio with regulated 3.3 V and spring antenna | Wired 10/100 Ethernet over SPI with hardwired TCP/IP | Stable 3.3 V supply and breadboard pinout for nRF24 modules |
| Interface | SPI 3.3V (not 5V tolerant — use a level shifter… | SPI up to 80MHz (3.3V, 5V-tolerant inputs) | SPI on a 1x8 breadboard header (nRF24 inputs are… |
| Best for | Long-range sensor links | Reliable wired IoT nodes | Reliable nRF24 links |
| Price | 59 AED | 39 AED | 9 AED |
Downloads
Documents and design files
Need a custom version of this board?
Different connector, size or sensor? We design and build custom variants.