Issue on M66 modem

Technical Subjects Software General Function
1

issues on M66 modem

  1. we got “ERROR” on the command AT+QIACT for vA2123 HW and M66R01A12 firmware, no problem if using vA2124 HW with same firmware version .

  1. I was noted that a fresh M66 doesn’t send URCs on power up/down until the command AT&W (more exactly, I send the multicommand string “ATV1X0;+IPR=115200;+IFC=0,0;&W”). How does this command affect URC?

  2. If VDD_EXT (pin 24 of M66) is UP, does this mean M66 is fully initialized and ready for all operations?

2

  1. It should not relate to the firmware version. Here are the scenarios of +QIACT returns error:
    a). Network registration is not ready. Use AT+CGERG to check registration status first.
    b). Duplicated activation. If PDP context has already been activated, you would get ERROR if you send AT+QIACT to activate again. Please check AT+CGPADDR to see whether the PDP conetxt has already been activated.
    c). Incorrect APN. Please check conetxt profile for both A2123 and A2124. Command: AT+CGDCONT?

  2. M66 module is set to autobauding mode (AT+IPR=0) by default. In the autobauding mode, URC ―RDY and POWERED DOWN will not be reported to the host controller after module is powered on/off.
    When you set a fix value like AT+IPR=115200:&W, then you would see the URCs on power on/off.

  3. Yes, you can treat it as that. But some application fucntion could still under intializing.