Tag Archives: BLUETOOTH


#76 ESP32 that is Arduino & MicroPython Compatible

ESP-WROOM-32 32-bit 240 MHz microprocessor

The ESP32 has already integrated an antenna and RF balun, power amplifier, low-noise amplifiers, filters, and power management module. The entire solution takes up the least amount of printed circuit board area. This board is used with 2.4 GHz dual-mode Wi-Fi and Bluetooth chips by TSMC 40nm low power technology, power and RF properties best, which is safe, reliable, and scale-able to a variety of applications.


#75 JDY-30 Bluetooth relay board

JDY-30 Bluetooth

This is a 12V relay that you can switch using the built-in JDY-30 Bluetooth slave module. By using the iq-blue terminal app on your phone, you can wireless open or close the relay by sending simple hexadecimal code to the board.

  1. Provide 12V DC input power to the board
  2. Search for bluetooth device and pair to “JDY-30” (password is “1234”)
  3. Download the IQ-BLue Bluetooth Terminal App
  4. Using hexadecimal, send “A00101A2” (open the relay), “A00100A1” (close the relay)
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