Tunnel – DATALOGGER. Telemetry (digital and analog inputs) sent periodically to broker MQTT (via JSON object) + transparent IP-RS232 gateway for remote access to RS232 device.

Scenario details:

• 3 digital inputs and 2 analog inputs must be sent to a web server via HTTP request using a JSON object
• The MTX will collect the digital and analog data every 10 minutes, sending it to an MQTT broker using a JSON object. If there is no 4G/3G/2G coverage or the web server is not available, no readings should be lost and the MTX modem must store the read records (a maximum of 1000 records) in its flash memory to try to send it when there is coverage
• Likewise, it is necessary to be able to activate a transparent IP-RS232 gateway in parallel to the telemetries for the remote reading of a device with RS232 serial port at 9600.8, N, 1. For convenience there is a SIM with a fixed IP address in the MTX modem
• The modem must also send its status (coverage, IP, etc.) periodically (every 10 minutes) to the MQTT broker

Solution: MTX-Tunnel firmware + MTX-IOT-S [4-N]

Configuration example (config.txt file) for the indicated scenario:

Configuración

Observaciones

COMM_baudrate: 9600 COMM_bitsperchar: 8 COMM_autorts: off COMM_autocts: off COMM_stopbits: 1 COMM_parity: none GPRS_apn: movistar.es GPRS_login: MOVISTAR GPRS_password: MOVISTAR GPRS_timeout: 0 MTX_pin: 0000 MTX_model: 199802407 MTX_mode: server MTX_urc: off MTX_TPProtocol: ntp MTX_TPServer: ntp.roa.es MTX_TPServer2: es.pool.ntp.org MTX_TPFormat: unix MTX_ping: 35 MTX_pingIP: 8.8.8.8 GPIO_mode0: input GPIO_config0: normal GPIO_mode1: input GPIO_config1: normal GPIO_mode2: input GPIO_config2: normal ADC_mode0: voltage ADC_config0: normal ADC_mode1: voltage ADC_config1: normal TCP_port: 20010 FIREWALL_enabled: off LOGGER_enabled: on LOGGER_password: ID00001 LOGGER_server: www.miservidorWeb.com/json.asp?data= LOGGER_registerSize: 300 LOGGER_numRegistersFlash: 1000 LOGGER_ioPeriod: 600 LOGGER_httpMode: getjson DNS_enabled: on DNS_server: www.miservidorWeb.com/json.asp?data= DNS_password: ID00001 DNS_mode: http DNS_httpMode: getjson DNS_exdended: on DNS_period: 600 MQTT_server: tcp://broker.mqttdashboard.com:1883 MQTT_id: [IMEI] MQTT_login: MQTT_password: MQTT_attopic1: [IMEI]/AT MQTT_atrtopic: [IMEI]/ATR MQTT_qos: 1 MQTT_keepalive: 60 GPIO_mode0: input GPIO_config0: normal GPIO_mode1: input GPIO_config1: normal GPIO_mode2: input GPIO_config2: normal ADC_mode0: voltage ADC_config0: normal ADC_mode1: voltage ADC_config1: normal TCP_port: 20010 FIREWALL_enabled: off LOGGER_enabled: on LOGGER_registerSize: 300 LOGGER_numRegistersFlash: 1000 LOGGER_mode: mqtt LOGGER_mqttTopic: /LOGGER LOGGER_ioPeriod: 600 DNS_enabled: on DNS_mode: mqtt DNS_exdended: on DNS_period: 600 DNS_mqttTopic: /DNS

Data rate of communication of serial port Number of bits CTS Hardware flow control deactivated RTS Hardware flow control deactivated 1 stop bit No parity GPRS APN provided by GSM operator GPRS Login GPRS Password Modem is permanently connected to GPRS PIN if it has one Device model Gateways used Every 30 minutes PING check Time synch protocol Time server Time server backup Unix time format Time server backup Unix time format MQTT service MQTT broker, format protocol://url:port Device ID in broker Username Password MTX topic to recieve AT commands Topic where MTX sends responses to AT commands QoS established Keepalive GPIO0 configured as input for dry contact sensor GPIO0 normal GPIO1 configured as input for dry contact sensor GPIO1 normal GPIO2 configured as input for dry contact sensor GPIO2 normal ADC0 configured to read voltage ADC0 normal ADC1 configured to read voltage ADC1 normal TCP port to receive IP connections Firewall status Logger status to store readings Size of internal MTX registry Max. number of registries Logger sending mode Topic to send modem data Period to read send digital/analog inputs DNS to send status Sending mode Also sending GPIOs and ADCs Period of sending, also when data changes Topic to send status data

Details:

• Remember that you have the I / O descriptions of the MTX model in ANNEX 10 of this manual. Be sure to configure the microswitches appropriately to read voltage or current on the AD0 and AD1 inputs of the MTX modem

• The MTX modem will send the value of its digital and analog inputs, the Logger data, every 600 seconds (10 minutes). In the MQTT sending that the MTX modem will carry out the topic configu
  {“IMEI”:354033091487838,”TYPE”:”IOS”,”TS”:”2020-02-08T15:35:07Z”,”P”:”ID00001”,”IO0”:1,”IO1”:0,”IO2”:0,”IO3”:0,”IO4”:0,”IO5”:0,”IO6”:0,”IO7”:0,”IO8”:1,”AD0”:1200,”AD1”:4850}
  Where:
  IMEI: indicates the IMEI of the modem
  TS: timestamp of when the data was read in the modem
  TYPE: frame type. In this case it is “IOS”
  Q: the field indicated in LOGGER_password
  IOx: digital input/output x. see Annex 10 for more information. x = 0… 8
  ADx: analog input 1 and 2 (values ​​from 0 to 50,000 mV)

  In the same way, the modem status data, DNS frames, sent every DNS_period seconds to the web server via HTTP, will have the following format:
  {“IMEI”:”354033091487838”,”TYPE”:”DNS”,”TS”:”2020-02-08T10:23:13Z”,”P”:”ID00001”,”IP”:”95.124.213.236”,”CSQ”:18,”TECH”:”4G”,”VER”:”11.00”,”AUX”:””,”MOD”:”MTX-IOT-4G-S”,VCC:12000}
  Where:
  IMEI: indicates the IMEI of the modem
  TS: timestamp with modem time
  TYPE: frame type. In this case it is “DNS”
  Q: the field indicated in DNS_password
  IP: current IP of the modem
  CSQ: RSSI (0… 31)
  TECH: technology (2G, 3G, 4G)
  SEE: FW MTX-Tunnel version
  AUX: auxiliary field defined in DNS_aux
  MOD: model of the modem (MTX_model field)
  VCC: MTX supply voltage (in millivolts)