Last Updated on : 2022-10-26 06:59:47
The Tuya Sandwich Bluetooth LE SoC board (BTU) has Tuya’s BTU Bluetooth Low Energy (LE) network module as a microcontroller, which is designed to help you easily prototype your IoT ideas. It can work with other circuit boards to implement specific features.
The development board is integrated with Tuya’s proprietary high-performance BTU Bluetooth module. The development board has on-board buttons, GPIOs, and a USB-to-serial chip. For more information, see the BTU Module Datasheet.
1: Jumper switches (P9 and P8), used to change the mode of the user port. Placing a jumper cap on
PB7-RXD enables the module’s pin to connect to the TX and RX pins. Placing a jumper cap on
PB7-U_TXD enables the module’s pins to connect to the U2 chip so that the user port can communicate with the module through the micro-USB port.
2: Micro-USB (P2): Inputs 5V DC voltage and provides one extended serial port.
3: DC-005 (P1): Inputs 12V DC voltage.
4: Button (S2): Connected to the
PA0 pin on the module. When the button is pressed, the low level is output. When the button is released, the high level is output.
5: Serial port (P3): Used to flash firmware to the BTU module.
6: Button (S1): Connected to the
RST pin on the module. When the button is pressed, the low level is output, and the module is reset.
|1||NC||Leave it floating.|
|2||NC||Leave it floating.|
|3||RST||Reset the module, low-voltage reset.|
|4||3V3||3.3V power pin.|
|5||5V||5V power pin.|
|8||VIN||12V power pin.|
|10||NC||Leave it floating.|
|11||NC||Leave it floating.|
|12||NC||Leave it floating.|
|13||NC||Leave it floating.|
|14||NC||Leave it floating.|
|15||TX||Use a jumper cap to switch to the
|16||RX||Use a jumper cap to switch to the
|30||NC||Leave it floating.|
When DC-005 inputs 12V DC voltage, the board can supply power to external components.
|Power pin||Rated voltage/current|
|VIN||Depends on the input current of the adapter connected to the DC-005 terminal.|
This board outputs rated power of 5W, which cannot support the long-time simultaneous output of 5V/1A and 3.3V/0.6A.
Characteristics of the output voltage of 5V
We tested the voltage under the condition that there is no output voltage on the 3V3 pin.
Characteristics of the output voltage of 3V3 pin
We tested the voltage under the condition that there is no output voltage on the 5V pin.
The schematic diagram of the board:
The PCB board:
The board has a built-in USB-to-serial chip. The single-channel USB port can provide one extended serial ports. You can use a jumper cap to allow the user port on the module to connect to the USB-to-serial chip.
Pin connection description
|Pins on module||PB1||PB7|
|Pins on board||TX||RX|
The serial port is left floating and not connected to the pins on the USB-to-serial chip or the board. The two headers are open without jumper caps.
The serial ports on the module are connected to the USB-to-serial chip. The TX and RX on the board are left floating. Put the jumper caps as shown below.
The serial ports on the module are connected to the pins on the board. The pins on the USB-to-serial chip are left floating. Put the jumper caps as shown below.
Download the USB-to-serial chip driver for your operating system.
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