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4 CHANNEL BLUETOOTH RELAY SHIELD
4 channel Bluetooth relay shield for Arduino. Wirelessly control AC/DC loads for home automation and IoT projects.
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Tag: 4 CHANNEL BLUETOOTH RELAY SHIELD
Description
The 4 Channel Bluetooth Relay Shield is a smart wireless control module designed for Arduino and microcontroller-based automation projects. Featuring built-in Bluetooth connectivity, it allows users to control up to four high-voltage AC or DC loads wirelessly using a smartphone, tablet, or Bluetooth-enabled device. Each relay can be independently switched, making it ideal for home automation, smart appliances, robotics, and IoT applications. The shield’s plug-and-play design simplifies installation and reduces wiring, while ensuring reliable and safe operation.
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58mm Thermal Printer (Black)
- Heavy-duty 58mm direct thermal printer
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- High speed printing of 90mm / Sec
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- Interface: usb + cash drawer support.
- Works with windows 7 / 8 /10
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- Long life thermal head.
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- Low cost,Low noise, fast speed print.
- Support cashbox drive.
- Compact and lightweight,beautiful design.
- Â Built in data bumper (data received when printing).
- Interface type parallel port or serial port.
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- Operation temperature0~50 Degree C
- Relative humidity10~80%
- Item size 12.8 * 18 * 10.8cm
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- Bluetooth module HC-08 Master and slave Two in one module.
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- Bluetooth protocol: Bluetooth Specification v2.0+EDR
- Speed: Asynchronous: 2.1Mbps(Max) / 160 kbps, Synchronous: 1Mbps/1Mbps.
- Security: Authentication and encryption.
- Profiles: Bluetooth serial port.

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