HC-12 433 MHz UART Transceiver
by Generic
SKU: PSA-CMP-HC12
No reviews yetTypical India street price
₹180–₹350
Longer-range serial radio than nRF24 in open fields (100 m–1 km claims).
Interface: UART
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Concept
A UART in, 433 MHz out, with AT for channel/power/baud.
A little theory
FU3 mode transparent serial. SET pin low for AT. Antenna quality dominates range. In the classroom, treat HC-12 433 MHz UART Transceiver as a intermediate part using UART. Typical India street price is about ₹180–₹350. Always verify voltage and pin labels on your exact module — silk screens vary across clones. Start with a datasheet or trusted learn guide, power the part correctly, share GND with the MCU, and test with a simple blink/read sketch before building the full project. Measure voltages with a multimeter when something fails, and keep actuator current off the MCU regulator.
How it works in a project
Two modules same channel/baud; Serial.write on one appears on the other.
Classroom & project use
- Farm sensor
- Robot telemetry across a playground
- Communication Modules classroom demo
Buying in India
Precautions
- Share a common GND with the microcontroller
- Verify polarity and voltage before powering the circuit
Specifications
| Band | 433MHz |
| Interface | UART |
| Category | Communication Modules |
| Difficulty | Intermediate |
| Voltage | 3.3–5V |
Pinout
VCC | GND | TX | RX (cross TX↔RX; common GND)
