Function get_csq 

pub fn get_csq() -> Result<i32>

Get the current network registration status.

Normally, CSQ = (113 + rssi) / 2

CSQ	RSSI
0	-113dBm or less
1	-111
2…30	-109…-53 dBm
31	-51 dBm or greater
99	not known or not detectable

Quectel Examples

None.

Implementation Notes

Calls ql_nw_get_rssi_ext (unfortunately not exported), which in turn calls qmi_client_send_msg_sync. The rssi value is then converted to CSQ.

The function calls printf("RSSI outside signal range: %d", arg1); in one of the branches, but I don’t know what the conditions are.