Hi,
I am using an RG255C-GL (Revision: RG255CGLABR01A04M4G) and I am trying to prevent the module from automatically obtaining an IP address at power-up.
Current behaviour:
- On power-up, without sending any AT commands, the module:
- Registers to the network
- Attaches to packet service (
+CGATT: 1) - Activates CID 1 (
+CGACT: 1,1) - Obtains an IP address (
+CGPADDR: 1,"x.x.x.x")
I have already:
- Cleared the PDP context APN:
AT+CGDCONT=1,"IP","",""
AT+CGDCONT? confirms CID 1 APN is blank.
- Cleared the Quectel internal profile:
AT+QICSGP=1,"","","",0
AT+QICSGP=1 confirms it is empty.
Despite this, after a full power cycle, the module still:
- Shows
+CGATT: 1 - Shows
+CGACT: 1,1 - Receives an IP address (appears to be network-assigned default APN)
There is no AT+QCFG="autoconnect" option available in this firmware (AT+QCFG=? does not list it).
What I want:
- On power-up, the module should register to the network only.
- It should NOT automatically attach or activate any PDP context.
- I only want an IP address to be obtained after:
- I set the APN manually.
- I issue
AT+CGATT=1. - I manually activate the PDP context.
Questions:
- Is there a way to disable automatic EPS attach / default bearer activation at boot on the RG255C-GL?
- Is there a firmware setting to prevent CID 1 from auto-activating?
- Is this behaviour controlled by the modem firmware or by the network (default APN provisioning)?
- Is there a recommended method to keep the module in registered-but-detached state until explicitly commanded?
Any guidance would be appreciated.