HL7812 GPIO2 constantly ON while in PSM mode

[hkiol]

PSM is working fine on HL7800 modems with current draw at 100uA as it should:

HL7800 sometimes not entering PSM mode

Hello, I am entering PSM hibernate mode by following this schema inside my application: AT+KSLEEP=1,2 // once at start-up STEP 1 When my device wakes up for next transmission, WAKEUP pin is pulled HIGH and I also give the command AT+CPSMS=0 just in case. The device transmits data. STEP 2 After data transmission I give the following command AT+CPSMS=1,"01001010","00000001" STEP 3 then I wait for +CEREG: 4 and after that I pull the WAKEUP pin LOW. then we go back to STEP 1 and so on… Th…