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• V3
• V2
• V1

• General
• FAQ Usage
• How many sensor can I connect to an ML-525
• What is the maximum number of option boards
• 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
• Monitor sensor communication
• Asterisk on data record
• How to make a support request
• Return a defective Data Logger
• 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 ML-417 Main board
• RTC Clock is losing date-time when powered off
• Replace the Power board fuse
• Sensor Power is intermittent detecting a short-circuit situa...
• 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
• SLA V2.0 or a relay to power heavy load sensors
• 2, 3 and 4-wire sensor configuration
• Modbus (RS-485) (un)supported bus topology
• Sleep current values explained
• Sensor power notes
• HF filtering on a digital input port
• How to check an electronic fuse
• Setup digital port for Pause/Resume function
• Sensors
• MODBUS Start Measure Command
• SDI12 sensor sometimes missing measurement data
• SDI-12 Limitations
• 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
• YdocInsight has problems with placing files using FTP
• WiFi card response - Modem Message, NO CARRIER
• 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 activ...
• Aditional documentation on Ydoc data loggers using MQTT
• Data logger DNS testing
• (ML-525xx) eSIM status and balance check
• Modem connection failures
• WiFi connection problems
• Use of an external GSM /LoRa antenna
• Application
• How to configure hysteresis on a digital alarm
• Use of a Calculation channel to prevent neg. Readings
• Usage of alarming levels low-low .. High-high
• 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
• Symptoms pointing to a corrupted configuration
• More (than two) SMS recipients
• Different data and send intervals during day/night
• Serial port buffer size

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