Mobile terminal and POS machine contact communication method and device and payment method
A POS machine and mobile terminal technology, applied in the field of communication, can solve the problems of cumbersome process, low NFC penetration rate, increased user cost, etc., and achieve the effect of high popularity, convenience and security.
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Embodiment 1
[0043] see figure 1 , the present embodiment is a kind of contact communication method between mobile terminal and POS machine, described mobile terminal and POS machine are provided with bluetooth module respectively, and this communication method comprises steps:
[0044] S1. Turn on the broadcast function of the Bluetooth module of the POS machine, and broadcast the Bluetooth signal;
[0045] S2. Turn on the scanning function of the Bluetooth module of the mobile terminal to obtain the Bluetooth signal broadcast by the POS machine;
[0046] S3. Calculate the distance between the mobile terminal and the POS machine according to the obtained Bluetooth signal;
[0047] Wherein, the distance between the mobile terminal and the POS machine is calculated according to the RSSI value of the Bluetooth signal obtained, and the specific steps of calculation are:
[0048] Calculate the RSSI value of the acquired Bluetooth signal;
[0049] The RSSI value is brought into the distance ...
Embodiment 2
[0061] Preferably, in order to further ensure the communication security between the mobile terminal and the POS machine, the mobile terminal and the POS machine further include a mutual locking step before establishing a communication connection according to the GATT protocol. That is, when the distance between the mobile terminal and the POS machine is less than the preset distance threshold, the mobile terminal and the POS machine enter a mutual locking state, and the POS machine and the mobile terminal in the locked state can only lock the mobile terminal or the POS machine with it. To establish a communication connection, even if the POS machine or mobile terminal with a distance less than the threshold is obtained, the connection will not be established. Through the locking step, the data transmitted between the mobile terminal and the POS machine can be prevented from being stolen by a third party, thereby ensuring communication security.
[0062] In one embodiment, in ...
Embodiment 3
[0064] see figure 2 , the present invention also provides a mobile terminal and a POS machine contact payment method, the mobile terminal and the POS machine are respectively provided with a Bluetooth module, the payment method includes the steps:
[0065] S10. Input the order information including the payment amount in the POS machine;
[0066] S20, the mobile terminal and the POS machine establish a communication connection according to the above-mentioned contact communication method between the mobile terminal and the POS machine;
[0067] S30. The mobile terminal shakes hands with the POS machine; the handshake process is:
[0068] The mobile terminal sends an encrypted handshake message to the POS machine;
[0069] The POS machine waits for the handshake message. If it times out, it disconnects. If it does not time out, it continues to receive the handshake message, and decrypts and judges the received handshake message. If the message information is correct, it sends...
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