無線模組
藍牙2.0 XBee模組 (HC-05晶片)
Bluetooth 2 0 Xbee Module Hc05
規格
- 供電電壓
- 3.3 V
- 介面
- uart
- 尺寸
- 31 × 24 × 9 mm
針腳
| 名稱 | 類型 | 說明 |
|---|---|---|
| UART_TX | output | UART Data output, CMOS, tri-stable with weak internal pull-up |
| UART_RX | input | UART Data input, CMOS input with weak internal pull-down |
| UART_CTS | input | UART clear to send, active low, CMOS input with weak internal pull-down |
| UART_RTS | output | UART request to send, active low, CMOS output tri-stable with weak internal pull-up |
| PCM_CLK | bidirectional | |
| PCM_OUT | output | |
| PCM_IN | input | |
| PCM_SYNC | bidirectional | |
| AIO0 | bidirectional | Programmable input/output line |
| AIO1 | bidirectional | Programmable input/output line |
| RESETB | input | CMOS input with weak internal pull-down |
| VCC | power | 3.3V |
| GND | ground | Ground pot |
| 1V8 | power | Integrated 1.8V (+) supply with on-chip linear regulator output within 1.7-1.9V |
| USB_- | bidirectional | |
| USB_+ | bidirectional | |
| SPI_CSB | input | Chip select for serial peripheral interface, active low, CMOS input with weak internal pull-up |
| SPI_MOSI | input | Serial peripheral interface data input, CMOS input with weak internal pull-down |
| SPI_MISO | output | Serial peripheral interface data output, CMOS input with weak internal pull-down |
| SPI_CLK | input | Serial peripheral interface clock, CMOS input with weak internal pull-down |
| PIO0 | bidirectional | Programmable input/output line, control output for LNA (if fitted), RX EN |
| PIO1 | bidirectional | Programmable input/output line, control output for PA (if fitted), TX EN |
| PIO2 | bidirectional | Programmable input/output line |
| PIO3 | bidirectional | Programmable input/output line |
| PIO4 | bidirectional | Programmable input/output line |
| PIO5 | bidirectional | Programmable input/output line |
| PIO6 | bidirectional | Programmable input/output line, CLK_REQ |
| PIO7 | bidirectional | Programmable input/output line, CLK_OUT |
| PIO8 | bidirectional | Programmable input/output line |
| PIO9 | bidirectional | Programmable input/output line |
| PIO10 | bidirectional | Programmable input/output line |
| PIO11 | bidirectional | Programmable input/output line |
其他規格
- 藍牙芯片
- HC-05
- 藍牙協定
- 藍牙 2.0
- 傳輸距離
- 10-15m
- 默認波特率
- 38400(主機模式)，9600(從機模式)
使用注意
- HC-05 模組供電範圍 3.1V~4.2V，但 UART 腳係 3.3V CMOS 電平，唔可以直接接 5V MCU 嘅 TX，要加電平轉換或者串聯電阻，否則會燒 RX。模組有兩個 1.8V 電源腳（14 號），默認用內部穩壓，如果外部供 1.8V 就要留意 jumper/接法，唔好同時供。UART 默認波特率視乎主/從模式：主機模式 38400，從機模式 9600，AT 模式通常要拉高 PIO11（KEY）再上電。USB 腳雖然引出，但唔係標準 USB 插座，要自己接 D+/D-，而且多數副廠板已經冇引出 USB。SPI 同 PCM 腳喺普通 AT 固件下未必用到，唔好當佢哋係通用 GPIO。