请问是否有人如何使用ESP8266 MQTT TLS Connect Azure Device Provision Service(DPS) Cloud?
目前使用ES8266 MQTT 连接MSFT Azure DPS 会无法连线，以下是我的AT CMD，想请问是否哪个步骤漏掉了，才导致不能连线?
AT+MQTTUSERCFG=0,2,"NULL","NULL","NULL",0,0,""
AT+MQTTCLIENtiD=0,"wexxxxx"
AT+MQTTUSERNAME=0,"0ne00xxxx/registrations/wexxxxx/api-version=2019-03-31"
AT+MQTTPASSWORD=0,"SharedAccessSignature sr=0ne00xxxx%2Fregistrations%2Fwexxx&sig=4xnwmi4IabfS%2FZ5bFJSLl8sRZ5mTeI3eoU9RcNLtqgA%3D&se=12986972404&skn=enrolltest"
AT+MQTTCONN=0,"global.azure-devices-provisioning.net",8883,1
因为从微软官方的文件来看，如果要连线Azure DPS 必须使用BaltimoreCyberTrustRoot CA,所以想请问如果我想更新ESP8266 MQTT root CA(BaltimoreCyberTrustRoot.crt.pem)，我透过以下这篇教学，把BaltimoreCyberTrustRoot.crt.pem 转成.bin，要把该CA flash download
到以下哪个区域?
如何产生PKI REF:
AT+SYSFLASH?
+SYSFLASH:"factory_param",64,8,0xf1000,0x1000
+SYSFLASH:"server_cert",64,2,0xf2000,0x2000
+SYSFLASH:"server_key",64,3,0xf4000,0x2000
+SYSFLASH:"server_ca",64,4,0xf6000,0x2000
+SYSFLASH:"client_cert",64,5,0xf8000,0x2000
+SYSFLASH:"client_key",64,6,0xfa000,0x2000
+SYSFLASH:"client_ca",64,7,0xfc000,0x2000
+SYSFLASH:"wpa2_cert",64,8,0xfe000,0x2000
+SYSFLASH:"wpa2_key",64,9,0x100000,0x2000
+SYSFLASH:"wpa2_ca",64,10,0x102000,0x2000
+SYSFLASH:"mqtt_cert",64,11,0x104000,0x2000
+SYSFLASH:"mqtt_key",64,12,0x106000,0x2000
+SYSFLASH:"mqtt_ca",64,13,0x108000,0x2000
