¶ Transmitter circuit diagram
The transmitter module is responsible for capturing user input through switches and sending data via the HC-12 module to the receiver unit. It also includes an OLED SSD1306 display for real-time feedback.
¶ Circuit diagram
The transmitter uses an Arduino Nano Every to control two SPST ON/OFF switches and one SPDT momentary switch, sending signals via an HC-12 module to a receiver unit. The circuit also includes an OLED display for real-time feedback. The schematic highlights all connections, including power, ground, and communication pins.
¶ Wiring Table
| Component | Pin on Arduino Nano Every |
|---|---|
| HC-12 VCC | 3.3V |
| HC-12 GND | GND |
| HC-12 TXD | D6 |
| HC-12 RXD | D7 |
| Up (SPDT Momentary Switch Action 1) | D2 |
| Down (SPDT Momentary Switch Action 2) | D3 |
| Busy (ON/OFF Switch) | D4 |
| Call (ON/OFF Switch) | D5 |
| OLED Display VCC | 3.3V |
| OLED Display GND | GND |
| OLED Display SCL | A5 (or SCL) |
| OLED Display SDA | A4 (or SDA) |
¶ Description of Components
- HC-12 Module: Handles wireless communication between the transmitter and receiver.
- SPDT Momentary Switch: One switch with two separate actions:
- Up Action: Sends a signal on D2.
- Down Action: Sends a signal on D3. - ON/OFF Switches: Two separate ON/OFF switches:
- Busy Toggle (D4)
- Call Toggle (D5) - OLED Display: Displays real-time feedback for the user.
- Arduino Nano Every: The central microcontroller managing all inputs, outputs, and communication.