How to Configure a Conlog Meter for APN Mode (TCP Communication)
sdg.hope
2026-02-24 09:21
This guide explains how to configure a Conlog meter for APN mode to enable TCP communication via a GPRS SIM card.
Step 1: Insert the SIM Card
Insert a valid APN-enabled SIM card into the meter?s SIM slot
Please Ensure the SIM card is active and has data enabled.
Step 2: Connect to the Meter
Open iDMConfig v2.1.0 and connect to the meter.
Step 3: Load the Object List
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Click on Objects List.
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If you have previously read the meter, select Read from Disk.
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If not, select Read from Meter (this may take some time as the software collects the meter data).
Step 4: Configure Class 28 ? Auto Answer
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Navigate to Class 28 (Auto Answer).
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Perform a Read on the Mode attribute.
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Confirm that it reads: Enum (Mode) = 0.
Step 5: Configure Class 29 ? Auto Connect
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Navigate to Class 29 (Auto Connect).
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Perform a Read on the Mode attribute.
If it reads: Enum (Mode) = 0
You must change it to: 101
Write the new value.
4. Write the new value.
5. Perform another Read to confirm it now shows: Enum (Mode) = 101
Step 6: Configure Class 49 ? GPRS Modem Setup (APN)
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Navigate to Class 49 (GPRS Modem Setup).
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Read the APN value.
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Ensure the APN matches your SIM card provider?s APN (in HEX format).
Example:
If using an Onomondo SIM card:
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APN (text): onomondo
APN (HEX): 6F6E6F6D6F6E646F
Final Step: Verify TCP Communication
Once all configurations are complete:
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Ensure Class 29 Mode = 101
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Ensure APN is correctly set
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Confirm SIM card has network connectivity
You should now be able to connect to the meter via TCP communication.
If the meter does not connect, verify:
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SIM card activation and data availability
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Correct APN in HEX format
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Network signal strength
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Firewall or server settings on the receiving side
Tags: conlogtcp