UART issues with BG95M2

IoT Modules LPWA Module
1

I have a BG95-M2 mounted on a custom board.

There is an issue with the board - I cannot turn off either the 3.3V supply or the 1.8V supply - they are always up, but I can power the module up.

When it powers up STATUS goes high and I see “RDY” on the uart.

STATUS then begins to toggle up and down, transitioning ever one or two seconds.

Each time it goes low I see another “RDY” on the uart.

I can send AT commands to the module, but they are ignored when STATUS is high. When STATUS is low the module responds .

For instance, when I send an ATI\r
I get back
Quectel
BG95-M2
Revision: BG95M2LAR02A04

Which looks good to me.

Any idea what’s going on?

2

Sorry,Is your description correct?Because it’s the opposite of what the hardware design manual says.It should be STATUS high can send AT normally and STATUS low can not do it.