Hello, I’m facing a problem using modem HL7802 with firmware 4.6.9.4. I use only HTTP connection. The connection to the serveur works fine when the modem is connected in CAT-M1 but when I’m in GSM (2G) I have the error: “HTTP connection error due to internal trouble” Log MCU to HL7802 (10:11:06.…

How about tcp and udp? I remember it should work in gsm mode [image] How to detect if NTP server cannot be reached HL78 I have just made a test with my HL7802 with GSM network here. I found that the CCLK time is updated after starting some UDP communication:…

Hi, Thanks for feddback. I try another thing but I got an error: (14:52:35.331) at+ksrat? (14:52:35.378) at+ksrat? (14:52:35.378) +KSRAT: 2 (14:52:35.378) OK (14:52:42.974) at+cfun=1,1 (14:52:43.025) at+cfun=1,1 (14:52:46.798) OK (14:52:55.927) at+cgdcont? (14:52:55.977) at+cgdcont? (…

I think you use the wrong apn for +cgdcont Btw, how about trying tcp and udp?

Hi, Since I have put AT+KCNXCFG=1,“GPRS”,“good APN” it’s now working. Now, even if I power OFF then power ON the board, it’s still working (without entering command KCNXCFG) In the AT command I can see this (my developement started with module fw version 4.3.9): [image] The modem shall works e…

Isn’t that the root cause is wrong APN is entered?

Hi, Before yesterday, I never put any APN in the modem and it worked fine with CAT-M1 and NB-IOT. So it should works with GSM too ?

You can make a test to verify in gsm mode

Hi, Thanks for feedback, I really appreciate your reactivity ! I have another modem and I try to connect in 2G and CAT-M1: 2G: [image] CAT-M1: [image] Here I didn’t put anything on APN.

why don’t you put the correct APN in the module? I remember GSM mode is a bit different from LTE mode. Even without APN, it can still register circuit switch network for GSM mode. For for LTE mode, user needs to enter correct when register network.

The product is not delivred with SIM card so I don’t know what will be the APN. I try AT command to read it from SIM card without success, any idea about how to get the APN ?

HL7802 - KHTTP_ERROR: 1,5 over GSM

IoT Modules HL78

jyijyi October 6, 2025, 10:55am 2

How about tcp and udp?

I remember it should work in gsm mode

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HL7802 - KHTTP_ERROR: 1,5 over GSM

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