BC26 MQTT OK BC28 Fail

IoT Modules LPWA Module
1

请帮我解说问题在哪，以下指令在BC26 可以正常，BC28为什么不行

REBOOTING
@????
Boot: Unsigned
Security B… Verified
Protocol A… Verified
Apps A… Verified

REBOOT_CAUSE_APPLICATION_AT
Neul
OK

ATI
Quectel
BC28
Revision:BC28JAR01A08

OK

AT+QMTOPEN=0,“iot.cht.com.tw”,1883
OK

+QMTOPEN: 0,0
AT+QMTCONN=0,“22022926541”[,“PK7CUSEZEZKKYYESYH”[,“PK7CUSEZEZKKYYESYH”]]
OK

+QMTCONN: 0,0,0
AT+QMTPUB=0,0,0,0,"/v1/device/22022926541/rawdata",[{“id”: “GLU”,“time”: “2020-04-12T10:44:58”,“value”: [“666”]}]
ERROR

AT+QMTSUB=0,1,"/v1/device/22022926541/sensor/GLU/rawdata",2
OK

+QMTSUB: 0,1,0,128

+QMTRECV: 0,0,"/v1/device/22022926541/sensor/GLU/rawdata",{“result”:false,“message”:“You cannot access - unknow key type”,“topic”:"/v1/device/22022926541/sensor/GLU/rawdata"}

iot平台 https://iot.cht.com.tw/iot/developer/mqtt
若有需要更新固件，请发至chifu20002000@yahoo.com.tw

2
  1. 無法註冊帳密
    AT+QMTCONN=?
    +QMTCONN: (0),""[,""[,""]]

Ans:
Delete [ ]

AT+QMTCONN=0,"","",""

  1. 無法發布訊息
    AT+QMTPUB=?
    +QMTPUB: (0),,,,"",""

Ans:
Command change
AT+QMTPUB ==> AT+QMTPUBEX

結論：指令說明誤導開發者

3

Hi Chifu
BC28 Special characters are not supported.
You can use the following modes to publish messages.
AT+QMTPUB=,,,,"" After “>” is responded, input the data to be sent. Tap “CTRL+Z” to send, and tap “ESC” to cancel the operation.