HC-06 Wireless Serial 4 Pin Wireless RF Transceiver Module RS232 Wireless module
Product characteristics:
1. The core module uses HC-06 slave module, the outgoing interfaces include VCC, GND, TXD, RXD, and the LED status output pin is reserved. The microcontroller can judge whether the wireless is connected through the pin status, and the KEY pin is invalid for the slave
2. The led indicates the wireless connection status. Flashing indicates that there is no wireless connection. Constant light indicates that the wireless connection is connected and the port is open
3. The backplane is 3.3V LDO, and the input voltage is 3.6~6V. The current is about 30mA when not paired, and about 10mA after pairing. The input voltage must not exceed 7V!
4. The interface level is 3.3V, which can be directly connected to various single chip computers (51, AVR, PIC, ARM, MSP430, etc.), and 5V single chip computers can also be directly connected, without MAX232 or through MAX232!
5. The effective distance of open space is 10 meters, and it is possible to exceed 10 meters, but the connection quality of this distance is not guaranteed
6. After pairing, it can be used as a full duplex serial port without knowing any wireless protocol, but it only supports 8-bit data bit, 1-bit stop bit, and no parity communication format, which is also the most commonly used communication format and does not support other formats.
7. When no wireless connection is established, it supports setting baud rate, name and pairing password through AT command, and the set parameters are saved after power failure. Automatically switch to transparent mode after wireless connection
8. Small size (3.57cm * 1.52cm), factory patch production, ensure patch quality. It is covered with transparent heat shrinkable tube, which is dustproof and beautiful, and has certain anti-static ability.
9. This link is a slave. The slave can pair with various computers with wireless functions, wireless hosts, most mobile phones with wireless functions, PDAs, PSPs and other intelligent terminals. Slaves cannot pair with each other.
Common sense (very important):
TXD: The sending end, generally referred to as its own sending end, must be connected to another device's RXD for normal communication.
RXD: The receiving end, generally referred to as its own receiving end, must be connected to another device's TXD for normal communication.
During normal communication, the TXD itself is always connected to the RXD of the device!
Self receiving: During normal communication, RXD is connected to TXD of other devices. Therefore, if you want to receive the data sent by yourself, as the name implies, that is, you receive the data sent by yourself, that is, your own TXD is directly connected to RXD to test whether your sending and receiving are normal. This is the fastest and simplest test method. In case of problems, you should first do this test to determine whether the product is faulty. Also called loop back test.
