DC 9-24V 4 8 Channel Relay Module ESP32 WIFI Bluetooth Development Board RS485 Modbus Optocoupler Isolate Module CH340 Type-C

Features:1. Optional 4-channel or 8-channel relay configuration for flexible adaptation to diverse scenarios.2. Integrated CH340 chip enables one-click programming via Type-C interface.3. Opto-isolated input/output ensures robust interference resistance and stable operation.4. Supports Modbus protocol for compatibility with industrial automation systems.5. Integrated RS485 and USART interfaces deliver strong expandability and simplified networking.Specifications:Configuration: 4-channel, 8-channel (selectable)Power Supply: DC 9-24V / Type-C power supplyModule: ESP32 with Wi-Fi + BluetoothType-C Port: Power supply and programmingEN Reset Button: Press to resetBOOT Button: Press and hold, then press the Reset button to enter download modeOptocoupler Input: Controls relaysSerial Chip: Integrated CH340 (supports one-click programming)Integrated: RS485 interface; Modbus compatiblePCB Dimensions:4-channel: 93mm × 87mm; 4mm mounting holes8-channel: 152mm × 87mm; 3.5mm mounting holesProduct List:Relay Module ×1