+ksup:0 comes again and again

IoT Modules Legacy HL Series
1

Hello everybody,

I’m developping a custom board with HL6528rd-g. In my own PCB, if I insert a sim card, all runs right. But if I put a sim card and a gsm antenna or a sim card and a gps antenna, +ksup: 0 comes again and again in my terminal. It seems like an operation of start-up. Anyone could give me some advices? Thanks

Sincerely

JL

2

JL,

It sounds like your unit is power cycling to me for some reason.

Regards

Matt

3

I am agreed with you. But I don’t know it seems like an electronic problem since I used my own PCB or I should use AT command to resolve this issue?

4

Its almost certainly a hardware issue and not related to the module firmware.

Regards

Matt

5

I have the same problem.
I will investigated and if you have the solution, please return.

6

My problem was solved, the power supply of the modem drops below 3.15V, and the modem resets when it try attach in the gprs.