RS485-to-WiFi-Gateway
aayu0-0
An STM32-based RS485 to Wi-Fi gateway supporting Modbus communication for industrial IoT applications.
Components (14)
| Reference | Value | Description |
|---|---|---|
| U1 | SP3485EN | Industrial 3.3V Low Power Half-Duplex RS-485 Transceiver 10Mbps, SOIC-8 |
| U2 | ESP32-S3-WROOM-1 | RF Module, ESP32-S3 SoC, Wi-Fi 802.11b/g/n, Bluetooth, BLE, 32-bit, 3.3V, onboard antenna, SMD |
| U3 | AMS1117-3.3 | 1A Low Dropout regulator, positive, 3.3V fixed output, SOT-223 |
| C1,C4,C10 | 100nF | Unpolarized capacitor |
| C2,C5 | 10uF | Unpolarized capacitor |
| C3 | 22uF | Unpolarized capacitor |
| D2 | SM712_SOT23 | 7V/12V, 600W Asymmetrical TVS Diode Array, SOT-23 |
| J1 | DB9_Socket | 9-pin D-SUB connector, socket (female) |
| J2 | USB_C_Receptacle_USB2.0_14P | USB 2.0-only 14P Type-C Receptacle connector |
| R1,R10 | 10k | Resistor |
| R2,R3 | 5.1k | Resistor |
| R4 | 120 | Resistor |
| R5,R6 | 560 | Resistor |
| SW1,SW3 | SW_Push | Push button switch, generic, two pins |