(utf8!)

这是API，还是以自己抓包为准。
curl -X POST -vv 'https://api.anjie-elec.cn/api/cashtopup/ReqAuth?accessToken=aaaaaaaaaaaaaaaaa.bbbbbbbbbbbbbbbb.ccccccccccccc' --data 'MachineId=AAAABBBB&Machinedata=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA&StudentId=11111111111111'

下面是对二维码的分析。1365010A这个卡本来有3.25元，另一个卡本来有0.16元，我冲5块钱，下面是一些二维码和服务器通信记录的分析。没做完，台麻烦。

final QR code reply: (sample 0-3)
       55 0A7B0391 63EF297A01A09273 773B0DFD
       55 0A7B0523 DA8D9DCD37E9654E 77A70DFD
       55 0A7B054F 0355A3E715D0E430 777B0DFD
       55 0A7B0597 8B860A6283C00938 77330DFD
          --------                  --------
          server time               something related to server time


server raw data reply: (sample 0-3)
E4D8C9E6CB8A8E94C32EA7 77DC0DFD 372805
35D890853871D259DD48CA 77A70DFD 9B0140
64D8F5D3767CAE4EB4A8E8 777B0DFD C6043E
4ED8244C112097BB1D4B8B 77330DFD 5D809C
                       -------- same as above


another qr code challenge:
                                                          0010: current balance (0.16 yuan)
           55 A343F703 000A7979D854B3F5F937963B02C48803FA 0010 E31ECB09 0000
qr code challenge:  (sample 0-3, the same)
           55 A343F703 000A7979D854B3F5F937963B02C48803FA 0145 1365010A 0000
challenge: 55 A343F703 000A7979D854B3F5F937963B02C48803FA 0145 1365010A 0000
              A343F703 == machine ID
                                                               1365010A == card ID
                     





server reply, server time test.
time         data
                                    37-2B == 98-8C == C  
0A7B0C8C:  4B D87B116B4EE666403203 77370DFD 246871
0A7B0C98:  C7 D826103518DE005297B6 772B0DFD 279450
0A7B0C99:  00 D826103518DE005297B6 772A0DFD B81D84

server_time = current_timestamp - 1393910716
https://www.unixtimestamp.com/index.php

0A7B0C55 -- Sun, 29 Sep 2019 08:49:21 GMT - 175836245
0A7B0DE6 -- Sun, 29 Sep 2019 08:55:38 GMT