FAQ(s)

• General
  • FAQ Usage
  • How many sensor can I connect to an ML-525
  • How long will my battery last
  • How long will my SD card last
  • How long will my SIM balance last
  • Four principles of Data Sampling
  • Limited output drivers
  • SD Card Testing
  • Return a defective Data Logger
  • Asterisk on data record
  • How to make a support request
  • Monitor sensor communication
  • What is the maximum number of option boards
• Electrical
  • Low Start Voltage or Modem power to low
  • Usage of a Voltage Divider (A /D input)
  • Deep discharge LifePO4 battery
  • Connecting External Solar Charger to SLA power board
  • Replace T 2A fuse on Main board
  • RTC Clock is losing date-time when powered off
  • Replace the power board fuse
  • Sensor Power is intermittent detecting a short-circuit situation
  • Connect more Solar Panels to the SLA Power Board
  • Usage of a Pot(entio)meter to test without Sensor
  • How to monitor the Data Logger Power Usage
  • Easily change battery’s
  • Data logger Low power considerations
  • 2, 3 and 4-wire sensor configuration
  • SLA V2.0 or a relay to power heavy load sensors
  • Modbus (RS-485) (un)supported bus topology
• Sensors
  • MODBUS Start Measure Command
  • SDI12 Limitations
  • SDI12 sensor sometimes missing measurement data
  • Use Maintenance COM port to communicate to MODBUS Sensor
  • Send a HEX command to a Sensor
  • How to maintain maximum precision on ML-OI-AD boards
  • Find and change SDI12 sensor address
• Network & Modem
  • TLS and Cyphers
  • MQTT connection problems
  • DNS request failure
  • Modem failure after upgrade
  • Intermittend Modem failure or loosing Internet connection
  • Delete pending messages in Swarm cache /queue
  • 4G SIM does not connect to 4G LTE-m network
  • WiFi card response – Modem Message, NO CARRIER
  • YdocInsight has problems with placing files using FTP
  • TLS usage on FTP /MQTT /HTTP servers
  • SSL Certificate setup for Telit modem
  • GPS orientation
  • Modem testing
  • Find information on Network coverage
  • Updating modem firmware using FOTA
  • Differences SFTP and FTPS
  • After a remote scheduled session, TCP terminal remains active
  • Aditional documentation on Ydoc data loggers using MQTT
  • Data logger DNS testing
  • (ML-525xx) eSIM status and balance check
• Application
  • How to configure hysteresis on a digital alarm
  • Usage of alarming levels low-low .. High-high
  • Use of a Calculation channel to prevent neg. Readings
  • INV;Aggregations;Has invalid data
  • How many Sensors can be configured on one Data Logger
  • How to take a picture with the Camera
  • Digital Input Port Frequency Limitations
  • Emergency Restore the SD card
  • Aggregations (Derived channels menu) explained
  • SD storage and Network Transfer Rate calculations
  • Date & Time no longer synchronized to NTP
  • Battery lifetime is shorter than expected
  • Parameter activity prior to last measurement
  • Setup a secured MQTT Connection to AWS-IOT platform
  • Camera has stopped sending pictures
  • Interfacing with Ydoc BLE card
  • More (than two) SMS recipients
  • Symptoms pointing to a corrupted configuration